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pile foundations

pile foundations

pile foundations

(OP)
I have to design the piles for supporting the bridge which is crossing a small stretch of water. The piles are partly embedded in water and then in soil. There is a pile cap connecting these piles above water level
( 3 nos piles in one plane). The bridge girders are directly resting on the pile cap.

The reactions ( Vertical and horizontal) from the girders are transferred to the pilecap.

Hecne the piles are subjected to vertical loads and horizontal loads at pile cap level. The piles are connected by a pilecap in one direction only and in the other direction it will be a cantilever. Can we assume the pile head as “ fixed “ ?

If we assume this as “fixed head", how to design the pile ? Based on soil properties, the embedment depth required will be more than 4 time T. So , this will be a long pile.

The charts given in “Pile design and construction practice – by Tomlinson “ for fixed pile head are for lateral loads at ground level only. How to design the pile for the externally applied moment and horizontal loads applied at higher level ?

It is a general opinion that the long piles are governed by the structural capacity of the pile. Does it mean that the soil can take any amount of load ? Please give suggestions.

RE: pile foundations

see my post in foundation forum.

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