soil report

Date : 20/02/2012 Report No: RGT12-018

Form No. : FGT-03 Issue : 01/01.03.2007 Rev. : 00 Page 2 of 7

CCOONNTTEENNTTSS

Page No.

1 Introduction 03

1.1 General Geology of the Area 03

2 Project and Site Description 03

3

Field Work

04

3.1 Standard Penetration Test 04

4 Laboratory Testing 04

4.1 Determination of Particle Size Distribution 04

4.2 Chemical Analysis 04

5 Sub-surface Conditions

05

5.1 Sub-surface Lithology 05

5.2 Ground Water 05

6 Recommendations 06

6.1 Allowable Bearing Pressures(Shallow foundations) 06

6.2 Excavations 07

6.3 Foundation settlements 07

7 Foundation Concrete 07

Appendix A : Site Location Map

Appendix B : Borehole Logs

Appendix C : Laboratory Testing

Appendix D : Chemical Standard



1. INTRODUCTION

On the request of M/s. Erga Progress on behalf of the owner, a site investigation work has been carried

out by Universal Soil Testing Laboratory for the proposed project. The main object of investigation was

to determine the sub-surface conditions at the proposed site and to provide necessary geotechnical

information to aid the structural engineer in designing their foundation. This report presents the general

characteristics and variability of the ground, ground water conditions and the conclusions of the of the

geotechnical investigation. The scope of work include preliminary site visit to collect information about

the present site conditions, drilling of boreholes up to required depth and sampling disturbed and

undisturbed samples, Performing the necessary field and laboratory testing on samples, Obtaining the

subsurface lithology of the site and ground water conditions and developing conclusions and

recommendations on the basis of discussion and observations.

1.1 General Geology of the Area

The deposits of the United Arab Emirates coastline and the floor of the Arabian Gulf are of mostly

Pleistocene or recent in age. Dubai is a place where a hot arid climate prevails. Average annual rainfall

may only be a few centimeters and the summer shade temperatures are frequently in excess 40°C. The

contrast between night and day temperatures and night and day humidity is often high. 'Desert' is a

geologically recent feature, the result of prolonged sub-aerial erosion and deposition in an arid

environment. Most of the surface of the present day UAE is a sand desert, stretching from the Arabian

Gulf Coast south to the unbroken and uninhabited sands of the Empty Quarter and east to the gravel

plains bordering the Hajar Mountains. At Dubai and Sharjah coastline is dissected by channels or

creeks and consists of a beach dune complex with development of Subkha plains in the hinterland at

the head of the creeks. Recent sediments overlying aeolian carbonate sandstone are therefore

generally encountered with occasional development of bioclastic limestone. The surface level of the

sandstone varies appreciably over the area being exposed at the ground level in some localities in

Dubai and occurring at depths of up to ten or twelve meters elsewhere. Towards Sharjah the sandstone

passes literally into sand with cemented and sandstone layers, which is encountered to the depth of

penetration of normal site investigation boreholes.

2. PROJECT & SITE DESCRIPTION

The proposed project consist a G+1 Villa. The site is located on Plot No. RO.082(refer Appendix A) at

Dubai Land, Dubai-UAE. The plot covers approximately an area of 625.44m2. At the time of

investigation, the site area was flat and vacant. The plot is bordered with vacant plots and paved roads.

Site levels are related to temporary bench mark established at the adjacent paved road level (Access

Road).



3. FIELD WORK

The execution of field Work on the site commenced on 12/02/2012 and the work completed on

16/02/2012. The borehole points were shown and identified by the client as depicted in the site plan

presented in Appendix A. Two (2) boreholes were drilled up to a depth of 15.5m each using cable

percussion techniques (Rig No. : RM-03) as per BS 5930: 1999, Code of practice for site Investigations.

3.1 SPT (Standard Penetration Test)

In order to determine the relative density of the strata, SPT (standard penetration tests) were carried

out at every half meter interval up to the depth of 3.0m and there after at every one meter interval up to

the required investigation depth. SPT tests were performed in accordance with BS1377:1990 Part 9

AMD8264-95, “Determination of Penetration Resistance Using Split Barrel Sampler (SPT)”. The test

consists of driving a 50mm external diameter thick walled sampler into soil using 63.5kg hammer falling

freely from a height of 760mm. The number of blows required to achieve a penetration of 300mm, after

an initial seating drive of 150mm is recorded and termed as "N Value". Disturbed split spoon samples

from the boreholes were also collected and examined through the SPT tests. All the results of the site

work are logged in the attached borehole logs in Appendix B.

4. LABORATORY TESTING

Laboratory tests were carried out on selected samples recovered from the borehole in order to

determine the physical and chemical properties. The results of laboratory tests are presented in

Appendix C.

4.1 Determination of Particle size Distribution

Selected soil samples were mechanically analyzed for classification and comparison purposes. Tests

were carried out in accordance with BS 1377 Part 2: 1990 Clause. 9.2 and the results are presented in

Appendix C of this report.

4.2 Chemical Analysis

Soil samples from the borehole were selected and given to another independent laboratory for the

determination of chloride content, sulphate content and pH value. The results are presented in

Appendix C. Chemical analyses were performed as per the following standards.

• BS 1377 Part 3 : 1990 Clause 5 - Determination of sulphate content

• BS 1377 Part 3 : 1990 Clause 7 - Determination of chloride content

• BS 1377 Part 3 : 1990 Clause 9 - Determination of pH value



5. SUBSURFACE CONDITIONS

The findings of the borehole were generally consistent with the anticipated geology of the site.

5.1 Sub-surface lithology

The nature of sub surface lithology as encountered by borehole drilling is summarized below

Borehole # 1

Depth (m) Description of Strata

0.0 – 0.5 Light brown, silty, fine grained SAND.

0.5 – 3.0 Medium dense, light brown, silty, fine grained SAND.

3.0 – 4.0 Very dense, brown, silty, fine grained SAND with rare gypsum.

4.0 – 12.0 Very dense, brown, silty, fine grained CEMENTED SAND.

12.0 – 15.5 Very dense, reddish brown, silty, fine to medium grained CEMENTED SAND with

occasional conglomerate pieces.

Borehole # 2

Depth (m) Description of Strata

0.0 – 0.5 Light brown, silty, fine grained SAND.

0.5 – 3.0 Medium dense to dense, light brown, silty, fine grained SAND.

3.0 – 4.0 Very dense, brown, silty, fine grained SAND with rare gypsum.

4.0 – 12.0 Very dense, brown, silty, fine grained CEMENTED SAND.

12.0 – 15.5

Very dense, reddish brown, silty, fine to medium grained CEMENTED SAND with


5.2 Ground Water

Observations concerning ground water were made during drilling and at completion of the field work.

Measurements of ground water levels were taken on the next day of drilling completion of each

borehole. Measured ground water table may be expected to vary due to the seasonal and tidal

fluctuations or any dewatering in the vicinity.

Ground Water table on the boreholes

Borehole No. Drilled Depth (m) Ground Water level (m)

BH 1 15.5 8.80

BH 2 15.5 8.70



6. RECOMMENDATIONS

Based on the test results and discussion, our recommendations are provided for the foundation design

and construction.

6.1 Allowable Bearing Pressures (Shallow Foundations)

6.1.1 Isolated/Strip at level 1.0m to 1.5m below

The foundation depth may vary according to the architectural requirement. However, the foundations

can be placed at a minimum depth of 1.0m below the Adjacent Paved Road (Access Road) Level. Prior

to construction, the top soil has to be excavated to at least 1.0m depth below the Road Level. The

excavated ground shall be inspected by an experienced engineer and if any soft spots are encountered

shall be removed and replaced with well compacted granular materials. The founding level at this layer

shall be tested for in-situ density of not less than 95% of its MDD. Covering with a layer of concrete

blinding should then protect the top surface.

Based on the standard penetration tests, practical experience and the empirical equations developed

by Terzaghi, Meyerhof and Bowels, below mentioned allowable bearing pressures were determined

considering shallow foundation at the above specified depth.

Foundation Bearing Capacity

Isolated/Strip up to max. width 3.0m 130 kN/m²

Isolated/Strip of 3.0-5.0m width 120 kN/m²

6.1.2 Isolated/Strip or Raft at level 3.0m to 4.0m below

The foundation depth may vary according to the architectural requirement. However, the foundations

can be placed at a minimum depth of 3.0m below the Adjacent Paved Road (Access Road) Level. Prior

to construction, the top soil has to be excavated to at least 3.20m depth below the Road Level. The

excavated ground shall be inspected by an experienced engineer and if any soft spots are encountered

shall be removed and replaced with well compacted granular materials. Place at least one layer of

granular road base material of compacted thickness 0.20m at the foundation formation layer. The

founding level at this layer shall be tested for in-situ density of not less than 98% of its MDD. Covering

with a layer of concrete blinding should then protect the top surface.

Foundation Bearing Capacity Modulus of Sub grade ‘k’ value

Isolated/Strip up to 5.0m width 160kN/m² -

Raft Foundation 170 kN/m² 17850 kN/m3

APPENDIX A

SITE LOCATION MAP

APPENDIX B

BOREHOLE LOGS

Report No. : RGT12-018 Date : 20/02/2012

Borehole No. : 1Client : M/s. Erga Progress Eng. & Consultants Borehole Depth (m) : 15.5Project : Proposed G+1 Villa Co-ordinates : Not GivenLocation : Plot No. RO.082, Dubailand, Dubai-UAE Drilling Method : Light cable PercussionGround Level : Flat Drilling Fluid : Water Drilling Started on : 12/02/2012 Depth of Casing Used (m) : 3.0Drilling Completed on : 13/02/2012 Inside Dia of Casing(mm) : 150Core Dia : Not Applicable Core Barrel : Not Applicable

N' Values TCR SCR RQD0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

6.5

7

7.5

8

8.5

9

9.5

10

TCR : Total core recovery SCR : Solid core recovery RQD : Rock quality designation

Ground Water Level (m) : 8.8 Date & Time of Water Level Measured : 13/02/2012 @ 10.00am

Remarks : None Driller Name : Raju Rig No. : RM-03

Form No. : FGT-01 Issue : 01/01.03.2007 Rev. : 01/26.05.2009 Page 1 of 2

Very dense, brown, silty, fine grained

CEMENTED SAND.

Light brown, silty, fine grained SAND.

Medium dense, light brown, silty, fine grained

SAND.

Borehole Log

Strata

Symbol

Depth

(m)Strata Description

Core RecoveryWater

Level

Sample

Type

Standard Penetration Test (No. of blows)

150mm 150mm 150mm

SPT

SPT

SPT

SPT

SPT

SPT

SPT

SPT

SPT 50/80 R

50/100

25/100

50/80mm

50/70mm25/80 50/70 RSPT

25/85

SPT

50/80

25/70

SPT 25/90

SPT R 50/80mm

50/95mm50/95 R

47

20

10 12

11

19

R 50/105mm

50/100mm

50/155mm

6

6

4

22

10 13

6

18

25/95

50/105

50/85mm

25/110

50/85 R

R

3/5

8 12

Very dense, brown, silty, fine grained SAND

with rare gypsum.

Request No. : QGT12-018

23

20

11 30

9

5

Continued on next page...

0.5m

4.0m

0.5m

4.0m

3.0m



N' Values TCR SCR RQD10.5

11

11.5

12

12.5

13

13.5

14

14.5

15

15.5


Ground Water Level (m) : 8.8 Date & Time of Water Level Measured : 13/02/2012 @ 10.00am




50/70mm

25/90

25/40

25/60

25/55

25/80

50/50mm

50/55mm

R 50/35mm

50/65mm

50/50 R

50/70

50/65 R

R

50/55 R

50/35

SPT

SPT©

SPT©

SPT©

SPT

Water

Level

Sample

Type


150mm 150mm 150mm

Core Recovery

Borehole Log

Strata

Symbol

Depth


Very dense, reddish brown, silty, fine to

medium grained CEMENTED SAND with


End of borehole 15.5m

12.0m




N' Values TCR SCR RQD0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

6.5

7

7.5

8

8.5

9

9.5

10


Ground Water Level (m) : 8.7 Date & Time of Water Level Measured : 16/02/2012 @ 12.40pm




25

27

9 22

12

4

5

4

9/15

50/120 R 50/120mm

9

16

22

6

34

29/11521 50/265mm

50/165mm

12/30 50/180mm

16

14 20

15

13

11

7 9

14

50/130mm50/130 R

R 50/95mm50/95

25/100

SPT 25/95

SPT

SPT

25/80

SPT

25/85 50/100 R

50/135mm

50/100mm

R

SPT

SPT 50/13525/130

41

38

25/145

SPT

SPT

SPT

SPT

SPT

SPT

SPT

Water

Level

Sample

Type


150mm 150mm 150mm

Core Recovery

Borehole Log

Strata

Symbol

Depth


Light brown, silty, fine grained SAND.

Medium dense to dense, light brown, silty,

fine grained SAND.

Very dense, brown, silty, fine grained SAND

with rare gypsum.

Very dense, brown, silty, fine grained

CEMENTED SAND.

Continued on next page...

0.5m

4.0m

0.5m

4.0m

3.0m



N' Values TCR SCR RQD10.5

11

11.5

12

12.5

13

13.5

14

14.5

15

15.5


Ground Water Level (m) : 8.7 Date & Time of Water Level Measured : 16/02/2012 @ 12.40pm



Borehole Log

Strata

Symbol

Depth


Core RecoveryWater

Level

Sample

Type


150mm 150mm 150mm

SPT

SPT©

SPT©

SPT©

SPT

50/40 R

50/45

50/55

50/80 R

R

50/80mm

50/85 R

R 50/45mm

50/40mm

25/45

50/85mm25/80

25/55


50/55mm

25/55

25/40

Very dense, reddish brown, silty, fine to

medium grained CEMENTED SAND with


End of borehole 15.5mEnd of borehole 15.5m

12.0m



APPENDIX C

LABORATORY TESTING


Request No. : QGT12-018 Borehole No. : 1

Sample No. : SGT12-018/01-1.5 Depth (m) : 1.5

Location : Plot No. RO.082, Dubailand, Dubai-UAE Source : Site

Sample Size (g) : 562.8

Sample Description : Sand

Sampling Method : BS 5930 Cls 22

Initial Sample Preparation : BS 1377 Part 1 : 1990 Cls 7.3 and 7.4.5

Test specimen Preparation : BS 1377 Part 2 : 1990 Cls 9.2.3

Test Method : BS 1377 Part 2 : 1990 Cls 9.2.4

Test Method Variation : None

Remarks : None

Date Tested : 12-14/02/2012

Tested By : AN

TEST RESULTS

* Results relates only to the items tested.

* Reports shall not be reproduced (except in full) without written approval of the laboratory.

Form No. : FGT-04 Rev. : 00 Page 1 of 1

Issue : 01/01.03.2007

REPORT ON PARTICLE SIZE DISTRIBUTION

0.300 96

0.212 88

TEST SIEVE SIZE( mm) PERCENTAGE

PASSING

0.425 99

1.18 100

0.600 99

30.063

690.150

0

10

20

30

40

50

60

70

80

90

100 0.00

0.01

0.10

1.00

10.00

100.00

1000.00

BS Sieve aperture Size (mm)

Percentage Passing

SAND

CLAY / SILT

% )

GRAVEL

COBBLE

BOULDERS

Date : 20/02/2012

Report No. : RGT12-018

1.5

1

BS Classification

Depth (m)

Borehole No.

Sample No.

SGT12-018/01-1.5

silty, fine grained SAND.

fine

medium

coarse

fine

medium

coarse

medium

coarse

fine

0.002

0.006

0.02

0.06

0.2

0.6

2.0

6.0

20

60

200


Request No. : QGT12-018 Borehole No. : 1

Sample No. : SGT12-018/01-1.0 Depth (m) : 1.0

Location : Plot No. RO.82, Dubailand, Dubai-UAE Source : Site

Sample Size (g) : 500.0

Sample Description : Sand

Sampling Method : BS 5930 Cls 22

Sample Preparation : BS 1377 Part 3 : 1990 Cls.7.2.3 Amd.9028-96 (Chloride)

: BS 1377 Part 3 : 1990 Cls.5.3 Amd.9028-96 (Sulphate)

: BS 1377 Part 3 : 1990 Cls.9.4 Amd.9028-96 (pH Value)

Test Method : BS 1377 Part 3 : 1990 Cls.7.2 Amd.9028-96 (Water Extraction) (Chloride)

: BS 1377 Part 3 : 1990 Cls.5.5 Amd.9028-96 (Water Extraction) (Sulphate)

: BS 1377 Part 3 : 1990 Cls.9 Amd.9028-96 (pH Value)

Test Method Variation : None

Remarks : None

Date Tested : 14-18/02/2012

Tested By : SC*

TEST RESULTS

Results relates only to the items tested.

Reports shall not be reproduced (except in full) without written approval of the laboratory.

* Test was subcontracted.


REPORT ON CHLORIDE, SULPHATE AND pH IN SOIL SUSPENSION

0.01

Parameter

Water Soluble Chloride as Cl-

%

pH Value at 200C

Unit Result

0.3

8.8

g/LWater Soluble Sulphate as SO3

pH Units

APPENDIX D

CHEMICAL STANDARD



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