Deep Foundation installation method’sPile and pier foundation • Cost in situ pile/pier foundation • Per-cost pile/pier foundation

Pre-cost piles/pier foundation• Construction and transportation of pre-cost pile/pier foundation

Installation of pre-cost pile/pier foundationNow 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.

2 - i n s t a l l a t i o n ( p e n e t r a t i o n ) b y h y d r a u l i c h a m m e r

Cost in Situ pile/pier foundation• 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 Drilling2- Steel fixing of foundation

• 3- Lowering of steel cage into the excavated area.• 4- concreting of pile/pier foundation.

Reverse Rotary Drilling(Wet method)This method of drilling used where maximum depth required up to 40 to 50 meters.This method executed by a Rig machine.

Hydraulic Auger Drilling(Dry method) Hydraulic drilling machine use where excavation depth 25 to 30 meters and this machine work very fast as compared to Rig drilling machine.

Steel cage fixing and lowering.

Concreting of pile/pier Foundation • In Wet drilling In Dry Drilling •

Caisson foundation installation methodCaisson 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.

Problems During installation of deep foundation and solutions.• 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.