some information about piling and process of piling of a flyover.

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)

19. Circular
CC block
weiring
welding

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?