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L&T DOKA L&T DOKA FORMWORK SYSTEMFORMWORK SYSTEM
PRESENTED BY:PRESENTED BY:
TUSHAR AKBARI (CPM0106)TUSHAR AKBARI (CPM0106)
SUBMITTED TO:SUBMITTED TO: MR. DEBASIS SARKARMR. DEBASIS SARKAR
DOKA FORMWORK Inc. leading European company
for concrete formwork. Doka formwork technology
makes a major contribution towards getting concrete into the desired form - in an economical way.
EUR 394 Million Doka Group is spreaded in more than 35 countries of world .
L & T-ECC in association with DOKA:1985 Collaboration with M/s Doka of Austria1986 Fabrication of steel components through
vendors commenced1990 Production of timber beams at Chennai
commenced1991 Marketing of formwork systems to external
clients1997 Dedicated factory set up at Pondicherry for
manufacture of steel components2000 1) Timber beam production facility at Chennai
shifted to Pondicherry2) New line added for timber beam production
to enhance capacity
MERITS OF L&T DOKA!!!!!! Simplicity in assembly of system. The system is flexible, easy to understand
and versatile. can be made suitable for all applications,
requires little working skill and helps to achieve uniformly good quality of finish.
high labor and material productivity with speed and safety.
Investment need may be made on the minimum quantity of formwork.
More no. repetitive usage. Greater life span and less labor requirement. Able to resist more lateral pressure of liquid
concrete. Less chance of burglary & misuse due to
heavy weight & large size. Easily modifiable as compare to steel
formwork. accurate, safe and speedy construction
DEMERITS OF L&T DOKA !!! High initial investment. would be handicapped
without tower crane. Require more mechanized
setup at site. Handling and placing is very
difficult, it requires separate shade to store them.
In house training require to increase labor efficiency.
Proper storage space is required when job is over
NEED FOR SYSTEMFORMWORK? Vertical growth Traditionally under mechanized &
labor intensive. Excessive use of reinforced
cement concrete. High quality surface finishes for
exposed R.C.C work Acute shortage of highly skilled &
competent formwork carpenter. Modular panel with high flexibility
LOADS AND DESIGN Density of concrete Slump of concrete Rate of pour Method of discharge Concrete temperature Vibration Height of discharge Dimensions of sections cast Reinforcement detail Stiffness of forms Transfer of loads from floor to floor during constructionShuttering area of 3 to 5 sq m. is required for placing 1 cu.m of
concrete and formwork therefore contributes a major factor in the cost, this being 25% to 70% of the total cost.
H-BEAM: BACKBONE OF L&T DOKA SYSTEMH-BEAM: BACKBONE OF L&T DOKA SYSTEM An engineered timber component Manufactured under strict quality control. The flanges are made of seasoned chemically
treated timber. The web is made of boiling boiling water proof plywoodwater proof plywood and joined with the flange by unique finger joint.
Hbeams are light, dimensionally stable and retain their structural properties over a period of time even after repeated usage.
The H beams can be used more than 100 times and it consumes only 40% of timber volume required.
H-16 (16 cm depth) and H-20 (20 cm depth), length varying from 1m to 4m. Reduces consumption of timber Minimizes work at site Consistent in strength. Cost ratio per use of H-16 beam to
conventional timber = 1: 3.5 Economical and long-lasting.
FLEX SYSTEM Components
H-Beam Floor Form Plywood Collapsible Telescopic
Prop Four way head Removable folding tripod Supporting head Assembly wedge clamp
FLEX SYSTEM Advantages
Effective for slab and beam formwork upto floor heights of 4.4 m.
Removable folding tripods make selected individual prop self standing
Flexibility in spacing between and heights of individual props.
Components are light enough for erecting and dismantling manually.
Lapping of standard lengths of H-Beams both in primary and secondary layers avoid their cutting at site.
Avoids skilled labour at site Enables re-propping and frequent reuse of materials. Simple deshuttering operation.
FLEX TABLE FORM Components
H-Beam Plywood Collapsible Telescopic
Prop Table head / U-Head Assembly wedge clamp
Advantages Can be transferred as complete set, hence no loss of
components Shifting trolley provides superb mobility in horizontal
direction Quick to shift, faster construction Easy fixing, high labour productivity Less props in relation to area
HEAVY DUTY TOWER SYSTEM Components
Basic Frame size of 0.9 m, 1.2 m, 1.8 m
Horizontal Brace Diagonal Brace Foot Plate U-Head Tower spindle with lever nut Beam span 2230 Beam span extension 1525 Coupler Brace stirrup Short prop
HEAVY DUTY TOWER SYSTEM Advantages
High load carrying capacity is > 25 tons per tower.
Rigid and stable with minimum bracings.
Easy to erect and dismantle using unskilled labour.
Tower as a whole can be shifted using crane and transport wheels.
Ideal for heavy floors involving greater heights.
Can be converted into stair tower with additional standard components.
Heights upto 700mm can be made by spindles at top and bottom
Close Connection Open Connection
WALL FORMWORK SYSTEM Components
H - Beam CT Prop H-Beam Splice Foot Adapter Steel waler Connecting Pin Wing Nut Tie rod Head Adapter Anchor Plate Lifting Bracket Angle Plate Adjustable splice plate Splice plate
Lifting Bracket
Timber Plank
Scaffold bracket
Head Adaptor
Steel Waler
Working Platform
Supporting Bracket
Foot Adaptor
WALL FORMWORK SYSTEM
WALL FORMWORK SYSTEM
Lifting Bracket
Timber Plank
Working Platform
Scaffold bracket
Steel Waler
CT Prop
Supporting Bracket
H-Beam
Foot Adaptor
WALL FORMWORK SYSTEM USED IN CEMENT SILO WITH WORKING PLATFORM AND HEAVY DUTY TOWER SYSTEM
WALL FORMWORK SYSTEM USING ALUMINUM PROPS AND SCAFFOLDING
Advantages Ideal system for speedy
construction. Wall panels can be dismantled and
handled manually. Minimizes the number of sheathing
joints. Simple shuttering and de-shuttering
operation. Wall Formwork panels facilitates
fixing of working platform and alignment system
COLUMN FORMWORK SYSTEM Components
H - Beam CT Prop H-Beam Splice Foot Adapter Steel waler Connecting Pin Wing Nut Tie rod Head Adapter Anchor Plate Lifting Bracket Angle Plate Adjustable splice plate Splice plate
Plan
Section
Working Platform
Scaffold bracket
Foot Adaptor Supporting Bracket
H-Beam
Tie Rod Anchor Plate
H-Beam Plywood
Steel Waler
CT Prop
CT Prop
COLUMN FORMWORK SYSTEM
Typical Column Formwork System
MODIFIED FORMWORK AS PER REQUIREMENT (DOKA + CONVENTIONAL FORMWORK)
ACCESS SYSTEM Components
Scaffold Frame 0.9 m, 1.2 m, 1.8m
Spring Locked connected pin
Foot plate Coupler Scaffold Coupler Scaffold Spindle 2H-225 Bracing Scaffold Board
TYPICAL HAND SKETCH SHOWING DETAILS OF ACCESS SCAFFOLDING WORK WITH BRACING TO PERMANENT
STRUCTURE
STAIR TOWER Components
Basic Frame 1.2 m Foot Plate Tower spindle with lever nut Coupler Spring locked connecting pin Horizontal Brace Scaffolding pipe Swivel coupler Stair Bracket Intermediate Railing Inner hand railing Connection Angle Grid Iron
STAIR TOWER
STAIRCASE IN HEAVY DUTY TOWER SYSTEN WITH SAFETY NET HT. 40 ft.
ELEVATION
TOP VIEW
NUCLEAR POWER PLANT FORMWORK : KAIGA UNIT 3&4
CLIENT: NUCLEAR POWER CORPORATION OF INDIA LTD. (NPCIL)
CONTRACTOR FOR INTAKE TUNNEL
M/S L&T , ECC DIVISION
CONTRACTORS FOR MECHANICAL WORKS
M/S BHEL
MAIN CONTRACTOR FOR CIVIL WORKS
M/S GAMMON INDIA LTD.
CONTRACTORS FOR PUMP HOUSE
M/S EPCIL(ENGG. PROJECTS INDIA LTD.)
CONTRACTOR FOR EXCAVATION WORKS
M/S AFCONS INFRASTRUCTURE
SUB CONTRACTOR FOR TB3,TB4,SRPH,FWPH
M/S IVRCL (I. VENKAT REDDY CONSTRUCTION
LTD.
SUB CONTRACTOR FOR FABRICATION AND FIXING
OF EPSM/S NSG FABRICATIONM/S SUVARNA FABRICATION
SUB CONTRACTOR FOR MACHINARY & EQUIPMEN
SUPPLY
M/S SETHIA EQUIPMENT
Major Consultants for 1&2Stup ConsultantsDevelopment consultants pvt. Ltd.Mecon (eng. & drg. Consultant)
Client is itself the designer of the project as this project is repetition of Kaiga 1 & 2.
PROJECT BREAK DOWN STRUCTURE
JOB: Construction of main plant civil works package II for Kaiga unit 3 & 4.
AIM: Generation of power using stem from PHWR type nuclear reactor .
PROJECT TYPE : Infrastructure CONTRACT TYPE: Item rate contract CLIENTS: Nuclear power corporation of India ltd.
(NPCIL)Kaiga Atomic Power Project 1,2,3&4Post: Kaiga,Karnatka 581400
CONTRACTOR: Gammon India Ltd.Civil Engineers and ContractorsGammon HouseVeer Sarvarkar Marg,Mumbai 400025
PROJECT COST: 254.82 Crores (for civil works only) CONTRACT PERIOD: 56 Months (including monsoon) STARTING DATE: 1st October 2001 EXPECTED COMPLITION DATE: 30th June 2006 SCHEDULED COMPLITION DATE: 40 Months (16 months Or earlier) DEFECT LIABILITY PERIOD: 12 Months PLANT AREA: 25 Hectare SITE AREA: 200 X 200 m2
FORMWORK OF OUTER CONTAINMENT WALL FROM EL. 93.870 TO EL 96.07 OF RB3
THANK THANK YOU!!!!!!!!!!!!!!YOU!!!!!!!!!!!!!!
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