its a brief ppt for the students who are doing btech in civil engineering

1. BY ABHISEK PANDA
REGD NO.-110301CER058
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2. KEY PLAN OF THE PROJECT
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3. DETAILS OF THE PROJECT
 Client Municipal Corporation,
Jalandhar
 Construction agency M/S Gammon India Ltd.
 Type of contract Item rate
 Total length of ROB 1.65 Km
 Cost of the project Rs 20 crores
 Contract period 15 months
 Starting date 28-06-2004
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4. COMPANY PROFILE
 Gammon India Limited is one of the leading
construction companies in India today.
 The company was established by late Mr. J. C.
Gammon in 1919 as a firm of Civil Engineers &
Contractor.
 Gammon's capabilities cover the entire spectrum
of technological advances in bridge engineering.
 Besides designing and building bridges, Gammon
has achieved perfection in the techniques of
launching, underwater concreting development of
supporting equipment.
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5. EQUIPMENTS USED AT SITE
Needle type vibrator (60 mm dia) Concrete pump (56 m³/hr)
Gantry girder ( 60 ton) Transit mixer (7 m³ capacity)
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6. EQUIPMENTS USED AT SITE
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8. FOUNDATION : PILES
 Piles are long slender members that carry and
transfer the load of the structure to the ground
located at some depth below the ground and the earth
surrounding the piles.
 Bored cast in-situ friction RCC piles of diameter 1000
mm.
 M35 grade of concrete was used at our site.
 Average depth of the piles was 20 m. 8

9. PIER CAP
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10. CONCRETE MIX PROPORTION FOR PILE CAP
 Different grades of concrete were used for the
bridge construction.
 M35 was used for the pile cap.
 Steel used : Fe 415.
 Cement used : Vikram cement (OPC 53 grade)
 Aggregates used : 10 mm, 20 mm and sand.
 Admixture used : FORSOC CONPLAST SP
430.
Cement : Sand : Coarse Aggregate = 1 : 1.36 : 3.24
Cement W/C
Ratio
Water Sand 20 mm 10 mm Admixture
400
kg/m³
0.37 148
kg/m³
684
kg/m³
592.5
kg/m³
592.5
kg/m³
0.4
1 0.37 1.36 1.94 1.3 0.001
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11. PROJECT NO. 2
SUPERVISION OF THE
SUPERSTRUCTURE
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12. Pretensioned I-Girder
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13. Methodology for the construction of I-Girder:
1. Preparing the shuttering:
Bearing plates Dowel bars
Groove made for bearings
Bearing
plate
dowels
grease
Dowel bars
200 mm length
Outer dia 50 mm
Inner dia 22 mm
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14. 2. Lowering of the reinforcement cage:
Gantry girder : 60 ton and 35 ton
3. Cable threading:
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Reinforcement
cage
cables
Wedges
and
barrels

15. 4. Stressing:
Least count of the pump : 5 kg/cm².
5. Closing of the side shutters
6. Concreting:
Automatic batching plant
Needle type vibrator : 60 mm dia
Concrete pump : 56 m³/hr
7. Deshuttering:
After 24 hrs
Cement W/C
Ratio
Water Sand 20 mm 10 mm Admixture
435
kg/m³
0.30 130.5
kg/m³
652
kg/m³
741
kg/m³
494
kg/m³
0.8%
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Concrete coming out of
the pipe line
Deshuttered beam

16. 8. Destressing
Using the grinder.
9. Lifting of the girders
10. Curing
For next 25 days at least.
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Hessian
cloth
Cables
after
cutting at
top
Cables after
cutting at bottom

17. BOX GIRDER
I-girders can be used only for the spans smaller than 20-25 m or which
are
not curved. For curved spans and spans which are greater than 20-25
m, box
girders are used.
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18. SAFETY REQUIREMENTS
1. Training the workers.
2. Providing the first aid.
3. List of nearby hospitals.
4. Safety manual.
5. Banners.
6. Using the safety equipments.
7. Providing the vehicle.
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