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Soil Mechanics and Foundation Engineering - Engineering

Q1:

The minimum centre to centre distance of friction piles of 1 m diameter, is

A 2 m

B 2 m to 3 m

C 3 m to 4 m

D 5 m

ANS:C - 3 m to 4 m

As per IS 2911:.

In case of piles founded on hard stratum and deriving their strength from end bearing the centre to centre distance between such piles should be 2. 5*dia of the pile.

In case of friction piles, the centre to centre distance should be 3*dia of the pile. 2.5d to 3.5d for end bearing pile.
3d to 4d for friction pile. 3*D for friction piles.
2.5 * D for end-bearing piles.