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

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Cep construction of railway overbridge by abhisek panda

  1. 1. 1 BY ABHISEK PANDA REGD NO.-110301CER058
  2. 2. KEY PLAN OF THE PROJECT 2
  3. 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. 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. 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. 6. EQUIPMENTS USED AT SITE 6
  7. 7. 7
  8. 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. 9. PIER CAP 9
  10. 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. 11. PROJECT NO. 2SUPERVISION OF THE SUPERSTRUCTURE 11
  12. 12. Pretensioned I-Girder 12
  13. 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. 14.  Lowering of the reinforcement cage: Gantry girder : 60 ton and 35 ton Reinforcement cage cables Cable threading: Wedges and barrels 14
  15. 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. 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. 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. 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. 19

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