Vol2 Endangering Landslide

Volume: II Section: 1I Page No: 7

Comprehensive CAT Plan of Satluj River Basin

Section 2:

Introduction

Site Details

Location Bajir bawadi

Stretch Details

General Information:

Type of surface Rockfall , Soil slope with erosion, and road subsidence Average inclination of rock slope w.r.t. Horizontal

[°] Above the road Below the road

60 45°

Total Length of the stretch (L)

[m] 100 m

Total Sloping Height (H)

[m] Above the road Below the road

100 75

Vegetation (if any) Yes(Little) Debris type(soil/ boulders)

Soil and small sized rocks



Approach to top portion of Slope

Yes / No Yes

Distance required at the top of slope (for Top anchoring)

[m] 4

Type of strata at Top of Cutting slope

Soil/ Rock/Rock with Soil cover

Rock with soil cover

Distance between slope bottom and infrastructure

[m] <1.0 m

Whether any erosion control measures to be provided on the face:

Yes

No

Whether Toe protection measures are to be provided

Yes

No

Problem The slope in this area is of rock above the road and below the road the slope is made of soil. The rock slope has been eroded at some stretches leading to rockfall. The soil slope is posing a problem of stability and surface erosion. Also some parts of the stretch has the problem of road sudsidence. The toe of the slope is subjected to erosion by the river at the bottom of the slope

Proposed Solution To take account of the stability and erosion of the slopes below the road level, gabions walls and Bio Mat (erosion control mat) along with DT Mesh is proposed to be laid on the slope surface. A toe wall made of gabion can be constructed at the bottom of the slope to prevent any toe erosion or encroachment leading to the failure of the slope, which also helps in stabilizing the slope. For road subsidence, gabion walls are to be constructed below the road to improve the stability of the slope and Bio Mat is proposed to take care of erosion on the slope. U pins of 0.6 m length are used to adhere Bio Mat to the slope which are placed at spacing of 3 m c/c. Bio Mat acts as erosion control mats and which after covering with vegetative soil will aid the local shrubs to establish firm roots.



Typical Cross-section:

Notes:

Gabion Wall for Mumbai-Pune Express way



Costing:

Location: Bajir Bawadi Stretch: Rockfall, Soil slope with erosion and Road subsidence Solution: Simple drapery system using Steel Grid MO and Erosion control Mat, Bio Mat on the failed slope and 5m High toe Gabion wall bove the Road level & Series of Gabion walls of height 5m Each for Toe protection and Slope retension ; Assumed Avg. Ht. 100.0m, length 200m; Total No. of Gabion walls : 3 No's

S.No Description Unit Qty Rate Amount (`)

1

Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc, with a thermally bonded geotextile at the rear of Gabions, etc complete.

Cum 6000 2700 16,200,000.00

2 Dressing of the soil-boulder slope to obtain a levelled surface

Sq.m 20000 250 5,000,000.00

3 Cutting of soil slope to required level and inclination as per drawing

Cum 6000 400 1,260,000.00

4 Backfilling at select areas with the excavated material to the required level and inclination as per drawings

Cum 6000 250 1,500,000.00

5

Providing and laying of Bio Mat Turf Reinforcement Mat made of an open three dimensional synthetic mat made of Polypropylene filaments with an additional Hexagonal shaped Double Twisted Wire Mesh of Mesh Type 10 x 12, Zn + PVC Coated 2.70/3.70 mm wire dia. including providing U Pins at every 3-4m c/c, neccessary laps etc

Sq.m 20000 850 17,000,000.00

6 Spreading of vegetative soil over the Erosion Control Blanket and planting of local shrubs etc

Sq.m 20000

-

7

Providing and laying of Simple Drapery System for protection of falling of loose boulder using SteelGrid-MO, Mesh type 10x 12, reinforced with 8.0mm steel cable over the entire slope, including providing anchors at the top and bottom, use of required accessories, complete.

Sq.m 20000 1500 7,500,000.00

8

Other miscellaneous civil works such as providing proper drains, toe collection system of loose rocks, access roads to the top etc.

LS

9,692,000.00

TOTAL

58,152,000.00



Section 2:

Introduction

Site Details

Location Browni

Stretch Details Stretch-1

General Information

Type of surface Weathered rock mass Average inclination of

rock slope w.r.t.

Horizontal

[°]

85

Total length of the

stretch (L) [m] 250

Total Sloping Height

(H) [m] 20-50

Vegetation (if any) No Debris type(soil/

boulders) Soil mixed with Boulders

Surface of rock

Regular / Undulating / Bumpy / Overhanging

Approach to top portion of

Slope Yes / No Yes

Distance Required at the

top of slope (for Top

anchoring)

[m] 4

Type of strata at Top of

Cutting slope



Road blocked by




Distance between slope

bottom and infrastructure [m] < 1.0

Whether any erosion

control measures to be

provided on the face:

Yes

No

Whether Toe protection

measures are to be

provided

Yes

No

Problem The principal problem in this stretch is of the rocks falling from the slope and blocking the road below. Since, the road is running closely to the foot of the slope, any unprecedented rockfall will lead to the closure of the road until the period of further clearance. On the slope, boulders mixed with soil are present and measures are to be taken to prevent the erosion of soil which finally leads to rockfall.

Proposed Solution To reduce the steepness of the slope, the soil portion at the top of the slope has to be removed and slope of 45° to 60° is to be made. Since large amount of the debris observed is of less than 0.5 -1 m in size, Steelgrid MO is proposed to be laid as simple drapery over the prepared slope. To prevent the debris from reaching on to the road, bottom anchoring may be done at frequent intervals for collecting debris and can be removed periodically.



Notes:

Site Details

Location Browni; At the Nalla; Problem of Debris Flow which flows in to the river

Stretch Details Stretch-2 General Information:

Type of surface Weathered rock mass with debris

Average inclination of rock slope w.r.t. Horizontal

[°] NA

Total width of the stretch (L)

[m] 10 – 15 m


[m] NA

Vegetation (if any) No Debris type(soil/ boulders)

Big Boulders

Surface of rock



Yes / No NA

Steelgrid MO application

Flow of debris




Distance Available at the top of slope (for Top anchoring)

[m] NA


Rock/soil/Rock with Soil cover

NA


[m] NA


Yes

No


Yes

No

Problem The problem in this particular stretch is of the small sized boulders/debris being carried from the upstream by the flowing water in the nalla and is deposited onto the road causing obstruction to the vehicles moving on the road.

Proposed Solution Debris flow barriers are proposed to be placed at three locations across the nalla. The debris flow barriers intercept the flowing rocks and prevent them from moving further down the nalla thus preventing the debris from blocking the road. The debris flow barrier on the upstream should be of higher energy than that of the barriers provided on the downstream of the nalla.

Debris Flow Barrier



Notes: Site Details Location Browni Stretch Details Stretch-3 General Information:

Type of surface Soil slope with heavy erosion

Average inclination

of rock slope w.r.t.

Horizontal


60 45°

Total Length of the

stretch (L) [m] 100 m


(H)

[m] Above the road Below the road

30 75

Vegetation (if any)

Yes(Shrubs and trees are present at some places of the stretch)

Debris type(soil/

boulders) Soil and small sized rocks

Debris Flow Barriers



Notes:

Approach to top

portion of Slope Yes / No Yes

Distance required at

the top of slope (for

Top anchoring)

[m] 3

Type of strata at Top

of Cutting slope


Soil

Distance between

slope bottom and

infrastructure

[m] <1.0 m

Whether any erosion

control measures to

be provided on the

face:

Yes

No

Whether Toe

protection measures

are to be provided

Yes

No

Problem The stretches in this area are of steep soil slopes which pose the problem of slope instability and also subsidence of the road can be observed at some places. The slopes are also subjected to severe erosion finally leading to the failure of slopes. Further, the cuts made in the slopes for the formation of roads have lead to the instability of the slopes.

Proposed Solution To take account of the excessive erosion of the steep slopes above the road level, Bio Mat (erosion control mat) along with DT Mesh is proposed to be laid on the slope surface. A toe wall made of gabion can be constructed at the bottom of the slope to prevent any toe erosion or encroachment leading to the failure of the slope, which also helps in stabilizing the slope. For the portion of slope below the road level and for road subsidence, series of gabion walls are to be constructed at intermediate places to improve the stability of the slope and Bio Mat is proposed to take care of erosion on the slope. U pins of 0.6 m length are used to adhere Bio Mat to the slope which are placed at spacing of 3 m c/c. Bio Mat acts as erosion control mats and which after covering with vegetative soil will aid the local shrubs to establish firm roots.





Costing:

Location: BROWNI Stretch: 1; Steep Slope with small sized boulders less than 0.5m nominal size with soil slope at the Top. Solution: Simple Drapery System at the Vertical Rock Face using Steel Grid MO system along with trimming of the top soil slope; Assumed Avg. Ht. 25.0m, length 200m


1

Providing and laying of Simple Drapery System for protection of falling of loose boulder using SteelGrid-MO, Mesh type 10x 12, reinforced with 8.0mm steel cable over the entire slope, including providing anchors at the top and bottom, use of required accessories, complete.

Sq.m 5000 1500 7,500,000.00

2 Loose rock scaling on the slope Cum 1500 950 1,425,000.00

3 Trimming of the soil slope on the top to a safe angle

Cum 5000 250 1,250,000.00



4


LS LS

2,543,750.00

TOTAL

12,718,750.00

Location: Browni Stretch: 2; Large flow of Debris (Small to medium sized boulders debris flow with water on the Nalla) Solution: Passive system of Debris Flow protection using Flexible High Energy Debris Flow Barriers at various intervals ; Assumed Avg. width of Stretch: 10.0m, No. of Barriers : 3 No's

S.No Description Unit Qty Rate Amount (INR)

1

Providing and laying of High Energy Debris Flow Barrier System , 6m height comprising of Main Interception Nets and additional Nets , Flexible posts, detachable base plates adequately galvanised, lateral bracing cables & upslope cables with ground anchors as per design and foundation anchors for posts and with all accessories complete.

LM 30 300000 9,000,000.00

2 Removing of Loose Boulders / Debris Cum 30 950 28,500.00

4 Other miscellaneous civil works such as excavation, channelizing, access roads to the top etc.

LS LS

2,257,125.00

TOTAL

11,285,625.00

Location: Browni Stretch: 3, Soil slope with heavy erosion Solution: Simple drapery system using Steel Grid MO and Erosion control Mat, Bio Mat on the failed slope and 5m High toe Gabion wall bove the Road level & Series of Gabion walls of height 5m Each for Toe protection and Slope retension ; Assumed Avg. Ht. 105.0m, length 100m; Total No. of Gabion walls : 6 No's


1


Cum 12000 2700 32,400,000.00


Sq.m 10500 250 2,625,000.00


Cum 3150 400 1,260,000.00

4

Backfilling at select areas with the excavated material to the required level and inclination as per drawings

Cum 3150 250 787,500.00



5


Sq.m 10500 850 8,925,000.00


Sq.m 10500 -

7


LS 9,199,500.00

TOTAL 55,197,000.00

GRANTD TOTAL: 79,201,375.00



Section 2:

Introduction

Site Details Location Dubling Bridge Stretch Details Soil Slope stability issues caused due to toe erosion at the bottom

by the River and surficial erosion on the slopes


Type of surface Soil slope not protected by vegetation; and Toe erosion.

Average inclination of rock

slope w.r.t. Horizontal [°]

60

Total length of the stretch (L) [m] 200 Total Sloping Height (H) [m] 50 Vegetation (if any) No Debris type(soil/

boulders) Soil with small rocks


Slope Yes / No Yes

Distance Available at the top

of slope (for Top anchoring) [m] <0.5


Cutting slope

Soil/Rock/Rock with Soil cover

Soil


bottom and infrastructure [m] NA

Whether any erosion control

measures to be provided on

the face:

Yes

No


measures are to be provided

Yes

No




Problem The toe of the slope is being eroded by the flowing river and also the slope is made of soil which poses the problem of soil erosion. Also the flowing river is causing the problem of siltation on one side of the river at the meander.

Proposed Solution A gabion toe wall of height 5 m is proposed along the bottom of the slope to control toe erosion along with gabion mattresses of 4 m length and 0.5 m thick to prevent the scouring at the bottom. Bio Mat is proposed to be laid on the slope to prevent soil erosion along with u-pins at 3m c/c spacing. Local vegetation needs to be planted on the top of Bio Mat to enhance the protection against surficial erosion. Also to control the erosion at the bottom of the slope, groynes of 8-10 m are to be provided at two locations which help in the process of siltation.



Notes:



Costing: Location: Dubling Bridge Stretch: Soil slope not protected by vegetation and Toe erosion. Solution: Soil Slope protection with 5m High Gabion retaining wall to retain the road, Erosion control Mat, Bio Mat on the slope and 5m High toe Gabion wall at bottom along with Apron protection using 0.5m thk. And River training measures using Gabion Mattress along with some Groynes. Assumed Avg. Ht. 50.0m, length 200m; Total No. of Gabion walls : 2 No's S.No Description Unit Qty Rate Amount (`)

1

Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc for Gabion walls and Groynes, complete.

Cum 8000 2700 21,600,000.00


Sq.m 10000 250 2,500,000.00


Cum 3000 400 1,200,000.00


Cum 3000 250 750,000.00

5


Sq.m 10000 850 8,500,000.00


Sq.m 10000 -

7

Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabion mattress of 0.5m thickness and 5m length and of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc for apron protection, complete.

Cum 1000 3200 3,200,000.00

8


LS LS 7,550,000.00

TOTAL 45,300,000.00


Section 2:

Introduction

Site Details

Location

Stretch Details


Type of surface Nallas with lot of debris flow


slope w.r.t. Horizontal [°]

Total width of the stretch

(W) [m]

Total Sloping Height (H) [m]

Vegetation (if any) No

Surface of rock


Slope Yes / No

Distance Available at the

top of slope (for Top

anchoring)

[m]


Cutting slope

Soil/Rock/

with Soil cover


bottom and infrastructure [m]

Whether any erosion



Volume: II Section: 1I Page No:

hensive CAT Plan of Satluj River Basin

Gangarang Nalla

Nallas with lot of debris flow

NA

5-10

NA

Debris type(soil/

boulders) Big Boulders


Yes / No NA

NA

Soil/Rock/Rock

with Soil cover NA

NA

Yes

No

Flow of debris

24

Boulders

/ Overhanging

Typical Cross-section


measures are to be

provided

This stretch is a glacier prone nallas with

large amount of debris flows along with

heavy water flow.



section:

Toe protection

measures are to be Yes

No

Problem

glacier prone nallas with


Proposed Solution

Debris flow barriers are

placed at three

The debris flow barriers intercept the

flowing rocks and prevent them from

moving further down the nalla thus

preventing the debris

road downstream.

the upstream is of higher energy as

compared to the barriers at other

locations

25


Proposed Solution

Debris flow barriers are proposed to be

locations across the nalla.

The debris flow barriers intercept the

flowing rocks and prevent them from

moving further down the nalla thus

preventing the debris from damaging the

road downstream. The barrier provided on

the upstream is of higher energy as

compared to the barriers at other


Notes:

Costing:

Location: Gangarang Nalla

Stretch: Nallas with lot of debris flow

Solution: Passive system of Debris flow protection through the Nallahs using Flexible

High Debris Flow Barriers at various intervals ; Assumed Avg. width of Stretch: 10.0m,

No. of Barriers : 3 No's

S.No Description

1

Providing and laying of High Energy

Debris Flow Barrier System , 6m height

comprising of Main Interception Nets and

additional Nets , Flexible posts,

detachable base plates adequately

galvanised, lateral bracing cables &

upslope cables with ground anchors as

per design and foundation anchors for

posts and with all accessories complete.

2 Removing of Loose Boulders

3

Providing and laying of Spot rock bolting

for a depth of 5-6m, with a 32mm dia

continuous threaded bar including drilling

and grouting

4

Other miscellaneous civil works such as

providing proper drains, toe collection

system of loose rocks, access roads to

the top etc.

TOTAL



with lot of debris flow



Unit Qty Rate Amount (INR)




additional Nets , Flexible posts,



ground anchors as



LM 30 300000

9,000,000.00

Cum 30 950

28,500.00


6m, with a 32mm dia

continuous threaded bar including drilling Nos 32 28800

921,600.00


toe collection

system of loose rocks, access roads to LS LS

2,487,525.00

12,437,625.00

26



Amount (INR)

9,000,000.00

28,500.00

921,600.00

2,487,525.00

12,437,625.00

Section 2:

Introduction

Site Details

Location Stretch Details

General Information

Type of surface

Average inclination of soil slope w.r.t. Horizontal

Total Length of the stretch (L) Total Sloping Height (H)

Vegetation (if any)

Approach to top portion of Slope Distance Required at the top of slope (for Top anchoring)



Khadura Dhank


Soil slope with heavy erosion

[°]

60 – 70 Degrees

[m] 1500 m

Sloping Height [m]

100 m

Yes Debris type(soil/ boulders)

Yes / No ----

at the top of slope (for [m] 5

27


70 Degrees

Debris type(soil/ Soil with boulders






[m]


Yes


Yes

Problem The problem at this stretch can be divided as

soil erosion on the slope and the toe erosion

of the slope by the river water. Due to the

erosion of the soil on the slope, boulders

from the slope are falling into the river,

obstructing the water flow. Also the toe

erosion in a period of time may lead to the

global failure of the slope



Soil/Rock/Rock with Soil

NA

Yes

No

Yes

No

The problem at this stretch can be divided as

soil erosion on the slope and the toe erosion

of the slope by the river water. Due to the

erosion of the soil on the slope, boulders

river,

obstructing the water flow. Also the toe

erosion in a period of time may lead to the

Proposed Solution A toe wall made from gabions is to be

placed at the toe of the slope to prevent

the erosion at the bottom of the slope

due to the river. The soil slope has to be

cut and trimmed to make an slope of 45°

- 60°. Over the prepared slope,

or Biomac can be laid to promote the

vegetation on the surface which can be

adhered to slope using 0.6 m length U

pins.

28

Proposed Solution

A toe wall made from gabions is to be

o prevent


has to be

cut and trimmed to make an slope of 45°

60°. Over the prepared slope, Bio Mat

or Biomac can be laid to promote the

which can be

adhered to slope using 0.6 m length U-

Notes:



29



Costing:

Location: Khadura Dhank Stretch: Soil slope with heavy erosionSolution: Erosion control Mat, Bio Matbottom along with Apron protection using 0.5m thk. Gabion Mattress Assumed Avg. Ht. 100.0m, length 1500m;

S.No Description

1

Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc for Gabion walls and Groynes, complete.




5

Providing and laying of Bio MatReinforcement Mat made of an open three dimensional synthetic mat made of Polypropylene filaments with an additional Hexagonal shaped Double Twisted Wire Mesh of Mesh Type 10 x 12, Zn + PVC Coated 2.70/3.70 mm wire dia. including providing U Pins at every 3-4m c/c, neccessary laps etc


7


8


TOTAL



Stretch: Soil slope with heavy erosion Bio Mat on the slope and 5m High toe Gabion wall at

bottom along with Apron protection using 0.5m thk. Gabion Mattress Assumed Avg. Ht.

Unit Qty Rate Amount (

Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc for

ls and Groynes, complete.

Cum 30000 2700 81,000,000.00

boulder slope to Sq.m 150000 250

37,500,000.00

Cutting of soil slope to required level

Cum 45000 400 18,000,000.00


Cum 45000 250 11,250,000.00

Bio Mat Turf Reinforcement Mat made of an open three dimensional synthetic mat made of Polypropylene filaments with an additional Hexagonal shaped Double Twisted Wire Mesh of Mesh Type 10 x 12, Zn + PVC Coated 2.70/3.70 mm wire dia. including providing U Pins at

4m c/c, neccessary laps etc

Sq.m 150000 850 127,500,000.00

Spreading of vegetative soil over the Erosion Control Blanket and planting of Sq.m 150000

-

Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabion mattress of 0.5m thickness and 5m length and of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with

equired sizes and quality etc for apron protection, complete.

Cum 3750 2500 9,375,000.00

Other miscellaneous civil works such as providing proper drains, toe collection system of loose rocks, access roads to

LS 56,925,000.00

341,550,000.00

30

on the slope and 5m High toe Gabion wall at bottom along with Apron protection using 0.5m thk. Gabion Mattress Assumed Avg. Ht.

Amount (`)

81,000,000.00

37,500,000.00 18,000,000.00

11,250,000.00

127,500,000.00

9,375,000.00

56,925,000.00

341,550,000.00



Section 2:

Introduction

Site Details Location Kaneri Stretch Details General Information:

Type of problem Landslide


slope w.r.t. Horizontal 60°

Total Length of the stretch

(L) [m] 300 m

Total Sloping Height (H) [m]

30

Vegetation (if any) Yes Debris type(soil/

boulders) ------




Slope Yes / No Yes

Distance required at the top

of slope (for Top anchoring) [m] NA


Cutting slope


NA


bottom and infrastructure [m] <1.0 m

Whether any erosion



Yes

No


measures are to be

provided

Yes

No

Problem The slope in this area is has failed causing lanslides and change in the level of the roads.

Proposed Solution To take account of the stability of the stability of the slope and the landslide, gabion walls as supposed to be placed at suitable locations on the slope.




Notes:




Costing:

Location: Kaneri Stretch: Landslide and slope stability Solution: 5m High toe Gabion walls above the Road level ; Assumed Avg. Ht. 30.0m, length 300m; Total No. of Gabion walls : 2 No's


1


Cum 12000 2700 32,400,000.00


Sq.m 9000 250 2,250,000.00


Cum 2700 400 1,260,000.00


Cum 2700 250 675,000.00

5


LS 7,317,000.00

TOTAL 43,902,000.00

Section 2:

Introduction

Site Details

Location

Stretch Details

General Information

Type of surface

Average inclination


Horizontal

Total width of the

stretch (W)


(H)

Vegetation (if any)

Surface of rock

Approach to top

portion of Slope

Distance Available at


Top anchoring)


of Cutting slope

Volume: II Section: II Page No:


Khoragla Nalla


Nallas with debris flow

[°]

NA

[m] 15-20

Sloping Height [m] NA

No Debris type(soil/

boulders)

Regular / Undulating / Bumpy

Yes / No NA


the top of slope (for [m] NA

of strata at Top Rock with Soil cover NA

Debris Flow

35


Debris type(soil/ Big Boulders

/ Overhanging

Debris Flow



Distance between

slope bottom and

infrastructure

[m]

Whether any erosion

control measures to

be provided on the

face:

Yes

Whether Toe

protection measures

are to be provided

Yes

Problem

This stretch is the glacier prone nallas with


heavy water flow.



NA

Yes

No

Yes

No

This stretch is the glacier prone nallas with


Proposed Solution

Series of three high energy debris flow

barriers made of ring nets are to be

constructed at the upstream side of the

nalla to prevent the huge rock masses

from moving down the nalla.

36

high energy debris flow

are to be

constructed at the upstream side of the

nalla to prevent the huge rock masses

Notes:

Costing:

Location: Khoragla Nalla


Solution: Passive system of Debris Flow protection using Flexible High Energy Debris

Flow Barriers at various intervals ;

Barriers : 3 No's

S.No Description

1


Debris Flow Barrier System ,

comprising of Main Interception Nets

and additional Nets , Flexible posts,





posts and with all acc


3

Providing and laying of Spot rock

bolting for a depth of 5

32mm dia continuous threaded bar

including drilling and grouting

4




the top etc.

TOTAL



Location: Khoragla Nalla



Flow Barriers at various intervals ; Assumed Avg. width of Stretch: 20.0m, No. of

Unit Qty










LM 30

Removing of Loose Boulders Cum 30

Providing and laying of Spot rock

bolting for a depth of 5-6m, with a

continuous threaded bar

including drilling and grouting

Nos 32



system of loose rocks, access roads to LS LS

37



Assumed Avg. width of Stretch: 20.0m, No. of

Rate Amount (INR)

300000

9,000,000.00

950

28,500.00

28800

921,600.00

2,487,525.00

12,437,625.00


Section 2:

Introduction

Site Details

Location Kuppa valley Stretch Details

General Information

Type of surface Soil slope with heavy erosion




[m]


[m]

Vegetation (if any) Yes


Yes / No

Distance Required at the top of slope (for Top anchoring)

[m]





Soil slope with heavy erosion

Above the road

Below the road

60-70 50-60°

500

200

Debris type(soil/ boulders)

Soil

Yes

5

Rock with Soil

38

Typical Cross

Distance between slope bottom and infrastructure Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

Problem The main problem at this stretch is of the loose soil mixed with boulders. The steep slopes pose the problem of heavy erosion and slope instability. the base of the slope is causing the problem of erosion of soil at the bottom leadierosion. Since the slope is made of soil, the surface also has the problem of continuous soil erosion.




[m] <0.5 m

Whether any erosion to Yes

No

protection measures Yes

No

Problem

The main problem at this stretch is of the loose soil mixed with boulders. The steep slopes pose the problem of heavy erosion and slope instability. Baspa river flowing at the base of the slope is causing the problem of erosion of soil at the bottom leading to toe erosion. Since the slope is made of soil, the surface also has the problem of continuous

Proposed Solution The slope has to be trimmed and made to an angle of 45-with Biomac or adhered to the slope with UGabions walls of heifght 5 m are placed at intermediate locations on the slope below the road. A toe wall made of gabion is placed at the bottom of the slope to prevent toe erosion and 0.5 m thick gabion mattress is also placed at the bottom to take prevent scouring.Erosion control Mats to be covered with vegetative soil and planted with local shrubs.

39


Proposed Solution

The slope has to be trimmed and made to -60° and is to be covered

with Biomac or Bio Mat and DT Mesh adhered to the slope with U-pins. Gabions walls of heifght 5 m are placed at intermediate locations on the slope below the road. A toe wall made of gabion is placed at the bottom of the slope to prevent toe erosion and 0.5 m

mattress is also placed at the bottom to take prevent scouring. Erosion control Mats to be covered with vegetative soil and planted with local




40

Costing:

Location: Kuppa ValleyStretch: Soil slope with heavy surficial erosion, toe erosion from RiverSolution: Soil Stabilization using Erosion control Mat, High toe Gabion wall bove the Road level & Series of Gabion walls of height 5m Each for Toe protection and Slope retension ; Assumed Avg. Ht. 200.0m, length 500m; Total No. of Gabion walls : 6 No's

S.No Description

1

Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVCMesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc, complete.

2 Dressing of the soilobtain a levelled surface



5

Providing and laying of Reinforcement Mat made of an open three dimensional synthetic mat made of Polypropylene filaments with an additional Hexagonal shaped Double Twisted Wire Mesh of Mesh Type 10 x 12, Zn + PVC Coated 2.70/3.70 mm wire dia. including providing U Pins at every 3-4m c/c, neccessary laps etc


7 Loose rock scaling on the slope

8 Trimming of the soil slope on the top to a safe angle

9

Other miscellaneous civil works such as providing proper system of loose rocks, access roads to the top etc.

TOTAL



Location: Kuppa Valley Stretch: Soil slope with heavy surficial erosion, toe erosion from RiverSolution: Soil Stabilization using Erosion control Mat, Bio Mat on the failed slope and 5m High toe Gabion wall bove the Road level & Series of Gabion walls of height 5m Each for

protection and Slope retension ; Assumed Avg. Ht. 200.0m, length 500m; Total No. of Gabion walls : 6 No's

Unit Qty

Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc,

Cum 40000

Dressing of the soil-boulder slope to obtain a levelled surface

Sq.m 100000

Cutting of soil slope to required level and inclination as per drawing

Cum 30000

at select areas with the excavated material to the required level and inclination as per drawings

Cum 30000

Providing and laying of Bio Mat Turf Reinforcement Mat made of an open three dimensional synthetic mat made of Polypropylene filaments with an additional Hexagonal shaped Double Twisted Wire Mesh of Mesh Type 10 x 12, Zn + PVC Coated 2.70/3.70 mm wire dia. including providing U Pins at


Sq.m 100000

Spreading of vegetative soil over the Erosion Control Blanket and planting of local shrubs etc

Sq.m 100000

Loose rock scaling on the slope Cum 2500

Trimming of the soil slope on the top to

Sq.m 500


LS

41


Stretch: Soil slope with heavy surficial erosion, toe erosion from River on the failed slope and 5m

High toe Gabion wall bove the Road level & Series of Gabion walls of height 5m Each for protection and Slope retension ; Assumed Avg. Ht. 200.0m, length 500m; Total No.

Rate Amount (`)

40000 2700 108,000,000.00

100000 250 25,000,000.00

30000 400 12,000,000.00

30000 250 7,500,000.00

100000 850 85,000,000.00

100000 -

950 2,375,000.00

250 125,000.00

48,000,000.00

288,000,000.00


Section 2:

Introduction

Site Details

Location Lal Dhank Stretch Details

General Information

Type of surface Fragmented Rocks on the erosion


[°]


[m]


[m]


Surface of rock




Fragmented Rocks on the slope with soil cover subjected to

[°] 60

500

500


Huge Boulders


42

subjected to

Huge Boulders



Approach to top portion of Slope Distance Required the top of slope (for Top anchoring) Type of strata at Top of Cutting slope Distance between slope bottom and infrastructure/ road Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

Problem The rocks on the slope are fragmented with joints and fissures. There is loose soil cover on the top which also causes the removal of small sized rocks.



section:

Yes / No ---

the top of slope (for [m] 10

Type of strata at Top Soil/Rock/Rock with Soil cover


[m] ----

Whether any erosion control measures to Yes

No


No

Problem

The rocks on the slope are fragmented with joints and fissures. There is loose soil cover

which also causes the removal of

Proposed Solution HEA panels of 400 x 400/10 mm

double twisted mesh

cortical strengthening are proposed on

the surface after the removal of loosely

held rock masses.

43



Proposed Solution

of 400 x 400/10 mm and

double twisted mesh 10x12/3 with

cortical strengthening are proposed on

the surface after the removal of loosely

held rock masses.


Notes:

Costing:

Location: Lal Dhank Stretch: Fragmented Rocks on the slope with soil cover Solution: Simple Drapery System at the Vertical Rock Face using HEA Panel + DT Netting system iand cortical strengthening over the slope; Assumed Avg. Ht. 100.0m, length 500m

S.No Description

1

Providing and laying of Simple Drapery System for protection of falling of loose boulder using HEA Panel, size 400 x 400mm, 10.0mm steel cable with a Mechnanically woven Double Twisted Zn. + PVC Coated Wire Mesh, 2.70/3.70mm dia. over the entire slope, including providing anchors at the top and bottom, use of required accessories like top support etc, complete.


3 Trimming/removal of any existing soil slope on the top to a safe angle

4

Supply and fixing of Steel Anchor bolts of 25mm dia. and depth of 3m with washer plates of size 150mm x150mm x 6mm in rock for cortical strengthening at 3m c/c including drilling of holes, inserting cement capsules inside the holes, other accessories etc.with all contractors materials, scaffolding, tools & plants, all lead & lift, contractors manpower etc, as complete and as shown in drawings.

4


TOTAL



Stretch: Fragmented Rocks on the slope with soil cover Solution: Simple Drapery System at the Vertical Rock Face using HEA Panel + DT Netting system iand cortical strengthening over the slope; Assumed Avg. Ht. 100.0m, length


Providing and laying of Simple Drapery System for protection of falling of loose boulder using HEA Panel, size 400 x 400mm, 10.0mm steel cable with a

woven Double Twisted Zn. + PVC Coated Wire Mesh, 2.70/3.70mm dia. over the entire slope, including providing anchors at the top and bottom, use of required accessories like top support etc,

Sq.m 50000 4000 200,000,000.00

Loose rock scaling on the slope Cum 10000 950 9,500,000.00

Trimming/removal of any existing soil slope on the top to a safe angle

Sq.m 10000 250 2,500,000.00

Supply and fixing of Steel Anchor bolts of 25mm dia. and depth of 3m with washer plates of size 150mm x150mm

strengthening at 3m c/c including drilling of holes, inserting cement capsules inside the holes, other

ith all contractors materials, scaffolding, tools & plants, all lead & lift, contractors manpower etc, as complete and as shown in

No's 1111 7500 8,332,500.00

Other miscellaneous civil works such as proper drains, toe collection

system of loose rocks, access roads to LS

44,066,500.00

264,399,000.00

44

Solution: Simple Drapery System at the Vertical Rock Face using HEA Panel + DT Netting system iand cortical strengthening over the slope; Assumed Avg. Ht. 100.0m, length

Amount (`)

200,000,000.00

9,500,000.00 2,500,000.00

8,332,500.00

44,066,500.00

264,399,000.00

Section 2:

Introduction

Site Details

Location

Stretch Details

General Information

Type of surface

Average inclination


Horizontal

Total Length of the

stretch (L)


(H)

Vegetation (if any)

Approach to top

portion of Slope



Top anchoring)



Lippa Valley

Below the road level


Soil slope subjected to erosion

[°]

45

[m] 200

Sloping Height [m] 8

Yes Debris type(soil/

boulders)

Yes / No Yes



45


Debris type(soil/ Soil and small

sized rocks



Notes:


of Cutting slope

Soil/Rock/Rock with

Soil cover

Distance between

slope bottom and

infrastructure

[m]

Whether any erosion

control measures to

be provided on the

face:

Yes

Whether Toe

protection measures

are to be provided

Yes

Problem

The main problem is of the slope material at

the bottom being carried away by the

flowing water in the river. The slope is made

of soil which also causes erosion over the

surface of the slope.

8 m high Gabion wall on bank of river Godavari, Nasik



Rock with NA

NA

Yes

No

Yes

No

main problem is of the slope material at

the bottom being carried away by the

flowing water in the river. The slope is made

of soil which also causes erosion over the

Proposed Solution

Over the slope, Bio Mat can be provided

to prevent the erosion of the slope.

high gabion wall and 0.5 m thick gabion

mattress can be constructed along the

bottom of the slope to protect the base of

the slope from the erosion effect of the

river water.

Gabion wall on bank of river Godavari, Nasik

46

Proposed Solution

can be provided

to prevent the erosion of the slope. 3 m

and 0.5 m thick gabion

can be constructed along the

bottom of the slope to protect the base of

effect of the

Section 2:

Introduction

Site Details


General Information

Type of surface

Average inclination of rock slope w.r.t. Horizontal Total length of the stretch (L) Total Sloping Height (H)

Vegetation (if any)

Surface of rock

Approach to top portion of Slope Distance Required at the top of slope (for Top anchoring) Type of strata at Top Cutting slope



Lippa Valley Above the road

General Information

Soil Slope with huge boulders

erage inclination of [°]

80

[m] 200


Yes Debris type(soil/ boulders)


Approach to top portion Yes / No Yes

at the top of slope (for [m] 4

Type of strata at Top of Soil/ Rock/Rock with Soil cover


47

Basin

Debris type(soil/ Boulders and soil



Comprehensive CAT Plan of Satluj River



[m]


Yes


Yes

Problem

Loosely held huge rock boulders on the

slope are to be prevented from falling down

the slope.



< 1.0

No

No

Loosely held huge rock boulders on the

slope are to be prevented from falling down

Proposed Solution Scaling should be done to remove the

loose boulders on the surface of the

slope. After scaling, HEA panels 400x

400/10 along with double twisted mesh

10x12 is draped over the slope with top

and bottom anchoring.

48

Scaling should be done to remove the

loose boulders on the surface of the

HEA panels 400x

400/10 along with double twisted mesh

10x12 is draped over the slope with top

Notes:

Costing:

Location: Lippa ValleyStretch: 1, Soil slope subjected to erosionSolution: Erosion control Mat, bottom including 0.5 m thk Gabion mattress as apron protection; Assumed Avg. Ht. 8.0m, length 200m; Total No. of Gabion walls : 1 No

S.No Description

1

Providing and laying ofwoven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc, complete.



5

Providing and laying of Bio Reinforcement Mat made of an open three dimensional synthetic mat made of Polypropylene filaments with an additional Hexagonal Twisted Wire Mesh of Mesh Type 10 x 12, Zn + PVC Coated 2.70/3.70 mm wire dia. including providing U Pins at every 3-4m c/c, neccessary laps etc


10


TOTAL



HEA + DT over the slope

Location: Lippa Valley Stretch: 1, Soil slope subjected to erosion Solution: Erosion control Mat, Bio Mat on the failed slope and 5m High toe Gabion wall at bottom including 0.5 m thk Gabion mattress as apron protection; Assumed Avg. Ht. 8.0m, length 200m; Total No. of Gabion walls : 1 No

Unit Qty

Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc, complete.

Cum 4000


Sq.m 1600

Backfilling at select areas with the excavated material to the required level

inclination as per drawings Cum 480



Cum 1600


Sq.m 1600


LS LS

49

Basin

on the failed slope and 5m High toe Gabion wall at bottom including 0.5 m thk Gabion mattress as apron protection; Assumed Avg. Ht.

Rate Amount (`)

4000 2700 10,800,000.00

1600 250 400,000.00

400 192,000.00

1600 850 1,360,000.00

1600 -

2,550,400.00

15,302,400.00


Location: Lippa Valley Stretch: 2; Steep Slope with Moderately jointed rock slope with boulders of big size > 0.5m and < 1.0m. Solution: Simple Drapery System at the Vertical Rock Face using HEA Panel + DT Netting system ; Assumed Avg. Ht. 50.0m, length 200m

S.No Description

1

Providing and laying of Simple Drapery System for protection of falling of loose boulder using HEA Panel, size 400 x 400mm, 10.0mm steel cable with a Mechnanically woven Double Twisted Zn. + PVC Coated Wire Mesh, 2.70/3.70mm dia. over the entire slope, including providing anchors at the top and bottom, use of required accessories like top support etc, complete.


3 Trimming/removal of any existing soil slope on the top to a safe angle

4


TOTAL



Stretch: 2; Steep Slope with Moderately jointed rock slope with boulders of big size >

Drapery System at the Vertical Rock Face using HEA Panel + DT Netting system ; Assumed Avg. Ht. 50.0m, length 200m


Providing and laying of Simple Drapery System for protection of falling of loose

HEA Panel, size 400 x 400mm, 10.0mm steel cable with a Mechnanically woven Double Twisted Zn. + PVC Coated Wire Mesh, 2.70/3.70mm dia. over the entire slope, including providing anchors at the top and bottom, use of required accessories

tc, complete.

Sq.m 10000 4000 40,000,000.00

Loose rock scaling on the slope Cum 2000 950 1,900,000.00

Trimming/removal of any existing soil slope on the top to a safe angle

Sq.m 2000 250 500,000.00


LS 8,480,000.00

50,880,000.00

50

Stretch: 2; Steep Slope with Moderately jointed rock slope with boulders of big size >

Drapery System at the Vertical Rock Face using HEA Panel + DT Netting

Amount (`)

40,000,000.00

1,900,000.00 500,000.00

8,480,000.00

50,880,000.00

Section 2:

Introduction

Site Details

Location

Stretch Details

General Information

Type of surface

Average inclination of

rock slope w.r.t.

Horizontal

Total length of the

stretch (L)


Vegetation (if any)

Surface of rock

Approach to top portion

of Slope



Top anchoring)



Namgia

General Information

Slope with several outcrops rock of heavy weathered rock

inclination of [°]

30

[m] --

Sloping Height (H) [m] 150

No Debris type(soil/

boulders)


Approach to top portion Yes / No Yes



51


Slope with several outcrops rock of heavy weathered

Debris type(soil/ Boulders





Cutting slope



bottom and

infrastructure

[m]

Whether any erosion



Yes


measures are to be

provided

Yes

Problem

The rocks from the slopes are rolling down

the slope and falling onto the infrastructure

at the base of the slope.




Rock

< 1.0

No

No

The rocks from the slopes are rolling down

the slope and falling onto the infrastructure

Proposed Solution A series of weirs with gabions can be

constructed on the slope to retain the

rocks from moving down the slope and

also vegetation can be also promoted on

the gabions.

52

Proposed Solution

A series of weirs with gabions can be

retain the

rocks from moving down the slope and

also vegetation can be also promoted on

Notes:

Costing:

Location: Namgia Stretch: Large slope stabilization with a water ChannelSolution: Series of Gabion weirs each of height 5m; Assumed Avg. Ht. 150.0m, length 200m; Total No. of Gabion walls : 5 No's

S.No Description

1






10


TOTAL



Stretch: Large slope stabilization with a water Channel Solution: Series of Gabion weirs each of height 5m; Assumed Avg. Ht. 150.0m, length 200m; Total No. of Gabion walls : 5 No's

Unit Qty

Providing and laying of mechanically woven double twisted hexagonal shaped

Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc, complete.

Cum 20000


Sq.m 30000

Cutting of soil slope to required level and inclination as per drawing

Cum 9000


Cum 9000

Spreading of vegetative soil over the Erosion Control Blanket and planting of

shrubs etc Sq.m 30000


LS

53


Solution: Series of Gabion weirs each of height 5m; Assumed Avg. Ht. 150.0m, length

Rate Amount (`)

20000 2700 54,000,000.00

30000 250 7,500,000.00

400 3,600,000.00

250 2,250,000.00

30000 -

13,470,000.00

80,820,000.00


Section 2:

Introduction

Site Details

Location Powari Pangi Nalla

Stretch Details Above the road level

General Information

Type of surface Slope with several outcrops rock of heavy weathered rock

Average inclination


Horizontal

[°]

Total Length of the

stretch (L) [m]


(H) [m]


Surface of rock


Approach to top

portion of Slope Yes / No



Top anchoring)

[m]


of Cutting slope

Soil/Rock/Rock with

Soil cover



Powari Pangi Nalla

Above the road level


[°] 60

2000

150 - 200

Debris type(soil/

boulders) Huge Boulders


Yes

---

Rock with Rock

54


Huge Boulders



Distance between

slope bottom and

infrastructure/ road

Whether any erosion

control measures to

be provided on the

face:

Whether Toe

protection measures

are to be provided

Problem

The problem is of the large boulders rolling

down the slopes from high heights causing

damage and blockage of roads



section:

[m] <0.5 m

Whether any erosion

measures to Yes

No


No

The problem is of the large boulders rolling

down the slopes from high heights causing

damage and blockage of roads.

Proposed Solution





cut and trimmed to make an slope of 60°.

Over the prepared slope, Bio Mat can be

laid to promote the vegetation on the

surface which can be adhered to slope

using 0.6 m length U

55

Basin

Proposed Solution





cut and trimmed to make an slope of 60°.

Over the prepared slope, Bio Mat can be

te the vegetation on the

surface which can be adhered to slope

using 0.6 m length U-pins.


Notes:



56

Costing:

Location: Powari Pangi

Stretch: Slope with several outcrops rock of heavy weathered rock

Solution: Erosion control Mat,


175.0m, length 2000m;

S.No Description

1

Providing and laying of mechanically

woven double twisted hexagonal

shaped Zn+PVC

Mesh wire Dia. 2.7mm / 3.7mm and

Mesh type 10x12 including lacing,

tying and filling of Gabions with stones

of required sizes and quality etc for

Gabion walls and Groynes, complete.

2 Dressing of the soil

obtain a levelled surface

3 Cutting of soil slope to required level

and inclination as per drawing

4

Backfilling at select areas with the

excavated material to the required

level and inclination as per drawings

5

Providing and laying of Bio Mat Turf

Reinforcement Mat made of an open

three dimensional synthetic mat made

of Polypropylene filaments with an

additional Hexagonal shaped Double

Twisted Wire Mesh of Mesh Type 10 x

12, Zn + PVC Coated 2.70/3.70 mm

wire dia. including providing U Pins at

every 3-4m c/c, neccessary laps etc

6

Spreading of vegetative soil over the

Erosion Control Blanket and planting of

local shrubs etc

7



shaped Zn+PVC

mattress of 0.5m thickness and 5m

length and of Mesh wire Dia. 2.7mm /

3.7mm and Mesh type 10x12 including

lacing, tying and filling of Gabions with

stones of required sizes and quality etc

for apron protection, complete.

8

Other miscellaneous civil works such

as providing proper drains, toe

collection system of loose rocks, access

roads to the top etc.

TOTAL



Location: Powari Pangi


Solution: Erosion control Mat, Bio Mat on the slope and 5m High toe Gabion wall at


175.0m, length 2000m;

Unit Qty



shaped Zn+PVC Coated Gabions of

Mesh wire Dia. 2.7mm / 3.7mm and

Mesh type 10x12 including lacing,

tying and filling of Gabions with stones

of required sizes and quality etc for

Gabion walls and Groynes, complete.

Cum 40000

Dressing of the soil-boulder slope to

obtain a levelled surface Sq.m 350000


and inclination as per drawing Cum 105000

Backfilling at select areas with the

excavated material to the required

level and inclination as per drawings

Cum 105000

Providing and laying of Bio Mat Turf

Reinforcement Mat made of an open

three dimensional synthetic mat made

of Polypropylene filaments with an

additional Hexagonal shaped Double

Twisted Wire Mesh of Mesh Type 10 x

12, Zn + PVC Coated 2.70/3.70 mm

. including providing U Pins at


Sq.m 350000

Spreading of vegetative soil over the

Erosion Control Blanket and planting of

local shrubs etc

Sq.m 350000



shaped Zn+PVC Coated Gabion

mattress of 0.5m thickness and 5m

length and of Mesh wire Dia. 2.7mm /

3.7mm and Mesh type 10x12 including

lacing, tying and filling of Gabions with

stones of required sizes and quality etc

for apron protection, complete.

Cum 5000

Other miscellaneous civil works such

as providing proper drains, toe

collection system of loose rocks, access

roads to the top etc.

LS

57

Basin


on the slope and 5m High toe Gabion wall at


Rate Amount (INR)

2700

108,000,000.00

350000 250

87,500,000.00

105000 400

42,000,000.00

105000 250

26,250,000.00

350000 850

297,500,000.00

350000

-

2500

12,500,000.00

114,750,000.00

688,500,000.00


Section 2:

Introduction

Site Details

Location Powari Pangi NallaStretch Details Below the road level


Type of surface Soil slope with


[°]


[m]


[m]



Yes / No

Distance Available at the top of slope (for Top anchoring)

[m]





Powari Pangi Nalla the road level

Soil slope with boulders subjected to erosion

[°] 45

2000

15-20



NA

NA

Rock with NA

58



Distance between slope bottom and infrastructure Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

Problem The portion of the slope below the road level

is facing the problem of toe erosion by the

high velocity waters of river Sutlej. The

velocity of the flowing water is around 4

m/s. Also the face of the slope is also being

subjected to erosion due to presence of

of loose soil.



section:

[m]

Whether any erosion control measures to Yes

No


No

Problem

portion of the slope below the road level

is facing the problem of toe erosion by the

high velocity waters of river Sutlej. The

velocity of the flowing water is around 4

m/s. Also the face of the slope is also being

subjected to erosion due to presence of lot

Proposed Solution Over the slope to take care of erosion,

Bio Mat is to be laid after the scaling of

the loose boulders and to avoid the

erosion of the slope toe due to river

water gabion wall can be constructed and

gabion mattress can be laid at the toe of

slope to prevent scouring action. The

height of the gabion wall from the river

bed should be more than the HFL of the

flowing river.

59


Proposed Solution

Over the slope to take care of erosion,

is to be laid after the scaling of

the loose boulders and to avoid the

erosion of the slope toe due to river

wall can be constructed and

gabion mattress can be laid at the toe of

slope to prevent scouring action. The

height of the gabion wall from the river

bed should be more than the HFL of the


Notes:

8 m highGabion wall on bank of river Godavari, Nasik



8 m highGabion wall on bank of river Godavari, Nasik

60

Costing:

Location: Powari PangiStretch: 1, Soil slope with boulders subjected to erosionSolution: Erosion control Mat, bottom including 0.5 m thk Gabion mattress as apron protection; Assumed Avg. Ht. 20.0m, length 2000m; Total No. of Gabion walls : 1 No

S.No Description

1




5

Providing and laying of Reinforcement Mat made of an open three dimensional synthetic mat made of Polypropylene filaments with an additional Hexagonal shaped Double Twisted Wire Mesh of Mesh Type 10 x 12, Zn + PVC Coated 2.70/3.70 mm wire dia. including providing U Pins at every 3-4m c/c, neccessary laps etc


7


TOTAL



Location: Powari Pangi Stretch: 1, Soil slope with boulders subjected to erosion Solution: Erosion control Mat, Bio Mat on the failed slope and 5m High toe Gabion wall at bottom including 0.5 m thk Gabion mattress as apron protection; Assumed Avg. Ht. 20.0m, length 2000m; Total No. of Gabion walls : 1 No

Unit Qty


Cum 40000


Sq.m 40000

Backfilling at select areas with the excavated material to the required level

inclination as per drawings Cum 12000



Cum 40000


Sq.m 40000


LS LS

61


on the failed slope and 5m High toe Gabion wall at bottom including 0.5 m thk Gabion mattress as apron protection; Assumed Avg. Ht.

Rate Amount (`)

40000 2700 108,000,000.00

40000 250 10,000,000.00

12000 400 4,800,000.00

40000 850 34,000,000.00

40000 -

31,360,000.00

188,160,000.00


Section 2:

Introduction

Site Details

Location Rispa Stretch Details


Type of surface Soil slope with

Average inclination


Horizontal

[°]

Total Length of the

stretch (L)

[m]


(H)

[m]


Approach to top




Top anchoring)

[m]


of Cutting slope


Distance between

slope bottom and

infrastructure

[m]



Soil slope with boulders and heavy erosion

70

500 m

40 m

Debris type(soil/

boulders) Soil with boulders

Yes / No Yes

>3m

Soil/Rock/Rock with Soil

NA

62

with boulders


Whether any erosion

control measures to

be provided on the

face:

Whether Toe

protection measures

are to be provided

Problem The major problem is of the instability of the

slopes and erosion of the soil on the slopes.

The slopes have failed making the slope

nearly vertical. Also at the toe of the slope, a

river is flowing which erodes the toe adding

to the instability of the slopes.



section:

Whether any erosion

control measures to Yes


Problem

The major problem is of the instability of the

slopes and erosion of the soil on the slopes.

The slopes have failed making the slope

nearly vertical. Also at the toe of the slope, a

which erodes the toe adding

to the instability of the slopes.

Proposed Solution Series of gabions

be constructed on the slope with

laid on the surface. At the b

slope gabion wall is to be constructed

along with gabion mattresses to avoid toe

erosion and scouring. Also, groynes are

to be constructed along the flow of river

to prevent erosion and increase siltation

on the banks.

63


No

No

Proposed Solution

Series of gabions of 4 m are proposed to

be constructed on the slope with Bio Mat

laid on the surface. At the bottom of the

wall is to be constructed

along with gabion mattresses to avoid toe

erosion and scouring. Also, groynes are

to be constructed along the flow of river

to prevent erosion and increase siltation


Costing:

Location: Rispa Stretch: Soil slope with boulders and heavy erosionSolution: Erosion control Mat, Bio Mat5m Each for Toe protection and Slope retension including 0.5m thkapron protection; Assumed Avg. Ht. 40.0m, length 500m; Total No. of Gabion walls : 3 No's

S.No Description

1

Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc, for Gabion walls & groynes complete.




5



7


8


TOTAL



Stretch: Soil slope with boulders and heavy erosion Bio Mat on the slope and Series of Gabion walls of height

5m Each for Toe protection and Slope retension including 0.5m thk Gabion mattress for apron protection; Assumed Avg. Ht. 40.0m, length 500m; Total No. of Gabion walls : 3



Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc, for Gabion walls &

Cum 30000 2700 81,000,000.00


5,000,000.00


Cum 6000 400 2,400,000.00


Cum 6000 250 1,500,000.00



Sq.m 20000 850 17,000,000.00

Spreading of vegetative soil over the Erosion Control Blanket and planting of Sq.m 20000

Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabion mattress of 0.5m thickness and 5m length and of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of equired sizes and quality etc for apron

Cum 1250 3200 4,000,000.00


LS 22,180,000.00

133,080,000.00

64

on the slope and Series of Gabion walls of height Gabion mattress for

apron protection; Assumed Avg. Ht. 40.0m, length 500m; Total No. of Gabion walls : 3

Amount (`)

81,000,000.00

5,000,000.00 2,400,000.00

1,500,000.00

17,000,000.00

4,000,000.00

22,180,000.00

133,080,000.00

Section 2:

Introduction

Site Details


General Information

Type of surface

Average inclination of rock slope w.r.t. Horizontal Total length of the stretch (L) Total Sloping Height (H)

Vegetation (if any)

Approach to top portion of Slope Distance Available at the top of slope (for Top anchoring) Type of strata at Top of Cutting slope Distance between slope bottom and infrastructure



Spillow


Soil slope not protected by vegetation; and Toe erosion.

[°] 60

[m] 500


No Debris type(soil/ boulders)

Yes / No Yes

Distance Available at the top of slope (for [m] <0.5

Type of strata at Top Soil/Rock/Rock with Soil cover

Soil

[m] NA

65


Soil slope not protected by vegetation; and Toe erosion.

Debris type(soil/ Soil with small rocks




Yes


Yes

Problem The toe of the slope is being eroded by the

flowing river and also the slope is made of

soil which poses the problem of soil erosion

Also the flowing river is causing the problem

of siltation on one side of the river at the

meander.



Yes

No

Yes

No

being eroded by the

flowing river and also the slope is made of

soil which poses the problem of soil erosion.

Also the flowing river is causing the problem

of siltation on one side of the river at the

Proposed Solution Series of gabions are constructed along

the sloe at intervals of 10 -15m. A gabion

toe wall of height 5 m is proposed along

the bottom of the slope to control toe

erosion and Bio Mat along with U

can be laid on the slope to prevent

erosion.

66

posed Solution

Series of gabions are constructed along

. A gabion

5 m is proposed along

the bottom of the slope to control toe

along with U-Pins

can be laid on the slope to prevent soil

Notes:



67



Costing:

Location: Spillow Stretch: Soil slope not protected by vegetation; and Toe erosionSolution: Erosion control Mat, Bio Mat5m Each for Toe protection and Slope retension including 0.5m thk Gabion mattress for apron protection; Assumed Avg. Ht. 30.0m, length 500m; Total No. of Gabion walls : 2 No's

S.No Description

1

Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc, for Gabion walls complete.




5



7


8


TOTAL



Stretch: Soil slope not protected by vegetation; and Toe erosion Bio Mat on the slope and Series of Gabion walls of height

5m Each for Toe protection and Slope retension including 0.5m thk Gabion mattress for apron protection; Assumed Avg. Ht. 30.0m, length 500m; Total No. of Gabion walls : 2



Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc, for Gabion walls

Cum 20000 2700 54,000,000.00


12,500,000.00


Cum 15000 400 6,000,000.00


Cum 15000 250 3,750,000.00



Sq.m 50000 850 42,500,000.00

Spreading of vegetative soil over the Erosion Control Blanket and planting of Sq.m Sq.m

Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabion mattress of 0.5m thickness and 5m length and of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of equired sizes and quality etc for apron

Cum 1250 3200 4,000,000.00


LS 24,550,000.00

147,300,000.00

68

on the slope and Series of Gabion walls of height 5m Each for Toe protection and Slope retension including 0.5m thk Gabion mattress for apron protection; Assumed Avg. Ht. 30.0m, length 500m; Total No. of Gabion walls : 2

Amount (`)

54,000,000.00

12,500,000.00 6,000,000.00

3,750,000.00

42,500,000.00

4,000,000.00

24,550,000.00

147,300,000.00

Section 2:

Introduction

Site Details

Location

Stretch Details

General Information

Type of surface

Average inclination


Horizontal

Total Length of the

stretch (L)


(H)

Vegetation (if any)

Surface of rock


Slope



Tikru slip



[°]

60

[m] 200

Sloping Height [m]

250

Yes Debris type(soil/

boulders)


Approach to top portion of Yes / No Yes

69

River Basin


Debris type(soil/

boulders) Boulders


Comprehensive CAT Plan of Satluj


Distance Available at the top of

slope (for Top anchoring) [m]


Cutting slope

Soil/Rock/Rock

with Soil cover


bottom and infrastructure [m]

Whether any erosion control

measures to be provided on

the face:

Yes


measures are to be provided

Yes

Problem

The slope in this stretch

contains large amount of

boulders which are loosely held

to the surface. The bottom of

the slope has the problem of

toe erosion by high water

flows.

Rock fall

slope to reduce the energy of the falling rocks and a

rockfall barrier is proposed at intermediate position on

the slope

constructed at the bottom of the slope to

erosion and also to catch the falling boulders

prevent

mattress is also to be constructed at the toe to prevent

scouring due to river water.



[m] > 3

Soil/Rock/Rock

with Soil cover Rock with soil cover

[m] NA

No

No

Proposed Solution

Rock fall barrier is proposed at the higher position of



the slope .A gabion wall of height 5 m is to be

constructed at the bottom of the slope to prevent toe

erosion and also to catch the falling boulders thus

preventing them from falling into the river. A gabion


scouring due to river water.

70

barrier is proposed at the higher position of



is to be

prevent toe

thus

A gabion


Notes:

Also a catch pit behind the Gabion Walls

can be removed periodically

Costing:

Location: Tikru Slip


Solution: Passive system of Rock fall protection using Flexible High Energy Rockfall

Barriers at various intervals and Gabion wall at toe to catch the boulder in the trench.

Avg. Height of stretch: 150m; Assumed Avg. length of Stretch: 200.0m, No. of Barr

: 2 No's

S.No Description

1


Rock fall Barrier System having a

capacity of 3000 KiloJoules





upslope cables in accordance with ETAG

027 with ground anchors as per design

and foundation anchor

with all accessories complete.


3


for a depth of 5

continuous threaded bar including

drilling and grouting

4


woven double twisted hexagonal shaped

Zn+PVC Coated Gabions of Mesh wire

Dia. 2.7mm / 3.7mm and Mesh type

10x12 including lacing, tying and filling

of Gabions with stones of required sizes

and quality etc, for Gabion wa

complete.

5




the top etc.

TOTAL



catch pit behind the Gabion Walls can be constructed to collect the rocks which

can be removed periodically




Avg. Height of stretch: 150m; Assumed Avg. length of Stretch: 200.0m, No. of Barr

Unit Qty


Rock fall Barrier System having a

capacity of 3000 KiloJoules, 6m height





upslope cables in accordance with ETAG

027 with ground anchors as per design

and foundation anchors for posts and

with all accessories complete.

LM 400

Removing of Loose Boulders Cum 30



continuous threaded bar including

drilling and grouting

Nos 16


woven double twisted hexagonal shaped

Zn+PVC Coated Gabions of Mesh wire

Dia. 2.7mm / 3.7mm and Mesh type

10x12 including lacing, tying and filling

of Gabions with stones of required sizes

and quality etc, for Gabion walls

Cum 4000



system of loose rocks, access roads to LS

71

River Basin

can be constructed to collect the rocks which




Avg. Height of stretch: 150m; Assumed Avg. length of Stretch: 200.0m, No. of Barriers

Rate Amount (INR)

300000

120,000,000.00

950

28,500.00

28800

460,800.00

2700

10,800,000.00

26,257,860.00

157,547,160.00


Section 2:

Introduction

Site Details

Location Tinku Nalla

Stretch Details


Type of surface Nalla with debris

Average inclination of

rock slope w.r.t.

Horizontal

[°]

Total width of the

stretch (W) [m]


(H) [m]


Approach to top




Top anchoring)

[m]


of Cutting slope

Soil/Rock/Rock with

Soil cover



with debris flow

NA

5-10

NA

Debris type(soil/

boulders) Big Boulders

NA

NA

Rock with NA

72

Boulders


Distance between

slope bottom and

infrastructure

Whether any erosion

control measures to

be provided on the

face:

Whether Toe

protection measures

are to be provided

Problem

The nalla here is of 5

carries rocks along with water and deposits

it onto the road below the nalla.



section:

[m] NA

Whether any erosion

control measures to Yes

No


No

Problem

The nalla here is of 5 – 10 m width and it

carries rocks along with water and deposits

it onto the road below the nalla.

Proposed Solution

To prevent the rocks from reaching the

road, two debris flow barriers ar

provided on the upstream of the nalla.

Also a culvert should be made at the

bottom of the road to allow for a free

passage of water downstream, thus the

problem of water flowing over the road

can be avoided.

73


Proposed Solution

To prevent the rocks from reaching the

road, two debris flow barriers are to be

provided on the upstream of the nalla.

Also a culvert should be made at the

bottom of the road to allow for a free

passage of water downstream, thus the

problem of water flowing over the road

can be avoided.


Notes:

Costing:

Location: Tinku Nalla

Stretch : Nalla with debris flow

Solution: Passive system of Rock fall protection using Flexible High Energy Debris Flow

Barriers at various intervals. Assumed Avg. width of Stretch: 10.0m, No. of Barriers :

No's

S.No Description

1

Providing and laying of High Energy Debris

Flow Barrier System , 6m height


additional Nets , Flexible posts, detachable

base plates adequately galvanised,

bracing cables & upslope cables with

ground anchors as per design and

foundation anchors for posts and with all

accessories complete.


3



continuous threaded bar including drilling

and grouting

4



system of loose rocks, access roads to the

top etc.

TOTAL




Barriers at various intervals. Assumed Avg. width of Stretch: 10.0m, No. of Barriers :

Unit Qty Rate Amount

(INR)

Providing and laying of High Energy Debris

Flow Barrier System , 6m height


additional Nets , Flexible posts, detachable

base plates adequately galvanised, lateral

bracing cables & upslope cables with

ground anchors as per design and

foundation anchors for posts and with all

LM 20 300000

6,000,000.00

Cum 30 950

28,500.00


6m, with a 32mm dia

continuous threaded bar including drilling Nos 16 28800

460,800.00



system of loose rocks, access roads to the LS

1,622,325.00

8,111,625.00

74


Barriers at various intervals. Assumed Avg. width of Stretch: 10.0m, No. of Barriers : 2

Amount

(INR)

6,000,000.00

28,500.00

460,800.00

1,622,325.00

8,111,625.00

Date post:	22-Mar-2016
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Vol2 Endangering Landslide

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