Detail about deep foundation and installation methods

2. Pile and pier foundation
• Cost in situ pile/pier foundation
• Per-cost pile/pier foundation

3. • Construction and transportation of pre-cost pile/pier
foundation

4. Now a days we are use different methods for installation of
per-cost pile/pier foundation.
1- installation (penetration) of pre-cost pile by
dropping heavy calculated weight from a
calculated height to the pre-cost pile top edge.

6. • We are follow some step for construction of a cost in situ
pile/pier foundation
• 1-Excavation for foundation by.
• Drilling
• i- Reverse Rotary Drilling
ii-Hydraulic Auger Drilling
2- Steel fixing of foundation
• 3- Lowering of steel cage into the excavated area.
• 4- concreting of pile/pier foundation.

7. This method of drilling used where maximum depth
required up to 40 to 50 meters.
This method executed by a Rig machine.

8. Hydraulic drilling machine use where excavation depth 25
to 30 meters and this machine work very fast as compared
to Rig drilling machine.

10. • In Wet drilling In Dry Drilling
•

11. Caisson foundation is a type cost in situ deep foundation.
Procedure of caisson foundation same as pile foundation
like excavation (using Hydraulic drilling machine), steel
fixing, steel cage lowering and concreting.

12. • Pre-cost pile penetration safety precaution.
• Dropping weight from specific height or calculated
height.
• With calculated weight
• Cost in Situ pile safety precaution
• During Wet method drilling
I – During drilling maintained water level if water level
reduced it may cause the collapse.
• Use Bentonite to remove cutting edges and maintain a
smooth surface.