The method statement for bored piling below describes the whole construction procedures including material and equipment required for the construction of bored cast-in-situ piles.
Detail of the procedures contained here in may be reviewed periodically and modified based on actual requirement.
The piles to be constructed will be of a nominal specified diameter, bored through overlying soils to found in the bedrock strata or remain in the soil to act as shaft friction and end bearing piles. The piles are designed by the Engineer to resist axial compressive loads.
BORED PILES CONSTRUCTION
The pile boring operations shall be performed using the suitable rotary drill rigs depends on the diameter, depth, soil condition and construction method.
If necessary, the bore-holes shall be stabilized with a temporary casing in the upper layer (depends on soil and site condition) .The length of the casing will be determined from the actual soil condition encountered on site. Bentonite shall be used for unstable subsoil condition and for piles equal and more than 1800mm diameter.
Bored piling is popular to be used in construction as a foundation, especially for bridge work and tall buildings as well. Bored piling work has to be done by specialist bored piling contractor, normal piling contractor cannot execute these type of work without experience and knowledge about bored piles.