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Cep construction of railway overbridge by abhisek panda

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

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

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  • 1. 1 BY ABHISEK PANDA REGD NO.-110301CER058
  • 2. KEY PLAN OF THE PROJECT 2
  • 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 3
  • 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. Gammons 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. 4
  • 5. EQUIPMENTS USED AT SITENeedle type vibrator (60 mm dia) Concrete pump (56 m³/hr) 5 Gantry girder ( 60 ton) Transit mixer (7 m³ capacity)
  • 6. EQUIPMENTS USED AT SITE 6
  • 7. 7
  • 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 9
  • 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 W/C Water Sand 20 mm 10 mm Admixture Ratio 400 0.37 148 684 592.5 kg/ 592.5 kg/ 0.4kg/m³ kg/m³ kg/m³ m³ m³ 1 0.37 1.36 1.94 1.3 0.001 Cement : Sand : Coarse Aggregate = 1 : 1.36 : 3.24 10
  • 11. PROJECT NO. 2SUPERVISION OF THE SUPERSTRUCTURE 11
  • 12. Pretensioned I-Girder 12
  • 13. Methodology for the construction of I-Girder:  Preparing the shuttering: dowelsgrease Bearing plates Dowel barsBearing Dowel bars plate 200 mm length Outer dia 50 mm Inner dia 22 mm 13 Groove made for bearings
  • 14.  Lowering of the reinforcement cage: Gantry girder : 60 ton and 35 ton Reinforcement cage cables Cable threading: Wedges and barrels 14
  • 15. 1. Stressing: Least count of the pump : 5 kg/cm².3. Closing of the side shutters4. Concreting: Automatic batching plant Needle type vibrator : 60 mm dia Concrete coming out of Concrete pump : 56 m³/hr the pipe line Cement W/C Water Sand 20 mm 10 mm Admixture Ratio 435 0.30 130.5 kg/ 652 741 494 0.8% kg/m³ m³ kg/m³ kg/m³ kg/m³13. Deshuttering: After 24 hrs Deshuttered beam 15
  • 16.  Destressing Using the grinder. Lifting of the girders4. Curing Hessian Cables cloth For next 25 days at least. after cutting at top Cables after cutting at bottom 16
  • 17. BOX GIRDERI-girders can be used only for the spans smaller than 20-25 m or which arenot curved. For curved spans and spans which are greater than 20-25 m, box 17girders are used.
  • 18. SAFETY REQUIREMENTS1. 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. 18
  • 19. 19