Piling of a flyover (AUST 2.2 A)
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This document provides an overview of the process for casting a flyover pile in situ. It begins with surveying the location and excavating the soil until bedrock is reached. A temporary steel case is placed and bentonite is used to prevent soil collapse. Reinforcing steel is assembled into a circular cage that is lowered into the excavation. The steel case is filled with concrete in stages. A load test is performed to ensure the pile can support the intended loads. Finally, a pile cap is constructed by placing concrete over gravel fill to connect multiple piles.
Piling of a flyover (AUST 2.2 A)
- 1. WELCOME
- 2. Presentation on FLYOVER PILING Prepared by: Course Teacher: Md. Arman Chowdhury Wahid Hasan (GROUP-5) 12.01.03.008; 12.01.03.016; 12.01.03.019; 12.01.03.025; 12.01.03.026; 12.01.03.032; 12.01.03.035; 12.01.03.038; 08.02.03.020;
- 3. What is Pile? • It is a long slender foundation member made either of timber,structural steel or concrete to transfer the load of the structure in deep foundation. Fig- Pile
- 4. Why do we use Pile? Weak Soil Deep Foundation Structure PILE Bed Rock
- 5. Advantage of Piling • To take the structure deep into the ground and hence preventing over turning. • To provide a strong bedrock soil (i.e. higher bearing capacity) for the structure and transfer the total load of the structure. • To distribute the weight of the structure over a large area. • To prevent unequal settlement.
- 6. Types of pile Depending on their function: • Bearing piles • Friction piles • Sheet piles • Anchor piles • Batter piles • Fender piles • Compaction piles Depending on their materials: • Timber piles • Concrete piles • Composite piles • Steel piles
- 7. Casting of a Flyover Pile (cast in situ) (Location- Mouchak Mogbazar Flyover)
- 8. •At first, the locations of piles are fixed by theodolite surveying.
- 9. 1. Excavation Started 2. If utility pipes are found during excavation, then the location point of pile is changed 3. No utility within 2 meter
- 10. Hydraulic Rig machine Cutting Bucket
- 11. •After excavating 6m temporary steel case is placed and then bentonite is used.
- 12. • Excavation continues according to design using rotary rig machine
- 13. •Using hose pipe to remove Bentonite mixed water after excavation process is completed
- 14. Making of Steel Case •Process of making the vertical reinforcements in circular arrangement
- 15. •Circular rings are used to make stirrups and to maintain perfect circular arrangement Stirrups
- 16. Completion of steel case
- 17. Thread Coupler •It is used to join the inner rebars
- 18. After applying pressure Punching machine Plane coupler (N.B: These two couplers are used for the very first time in our country)
- 20. •Placing of steel case
- 21. Placing of trimmy pipe Started casting
- 22. •After completion of casting
- 23. Top head of the pile is removed Removed pile heads
- 24. Load test of pile : •Load test is done by using hydraulic jack Load test continued (each block weighs 1 ton)
- 25. One layer BFS to level the surface of the pile cap
- 26. Casting on the BFS After Casting on the BFS
- 27. Placing of reinforcement after initial casting of pile cap
- 28. Chair
- 29. Completion of placing reinforcement of pile cap
- 30. Completion of casting of pile cap
- 31. Observations: • The water that they used to admix the bentonite was recycled for next use also. •They maintained the weiring and welding properly to make steel case strong enough to carry the load. •When they broke the pile head, it should be above 6” from the ground surface. But in some cases accidently, they couldn’t manage to do so. Therefore, they placed an extra layer of CC of 6” which shouldn’t be as it couldn’t take the load properly.
- 32. THANK YOU…
- 33. Do you have any Questions?