If the pile group has a centrally located torsional loading and there is symmetry of the piles around the group centre then each pile will attract a lateral resistance from the soil acting at right angles to the ray from the group centre to the pile centre. This will be associated with a "small" rotation of the group and hence of the individual piles which is often of no consequence.

Tim Hull Thanks a lot for your reply sir.

I am working on a problem which is an eccentric pile cap and it is a five pile cap. the point of loading is 1m eccentric to the CG of pile group. I am using SAFE software for design of pile cap.

In manual design due to the based on eccentricity the Pile reactions will vary and depending upon the lever arm we will find the moments right.

When I try to compare with manual and Software results it is not matching and the moments are heavier in Longitudinal and transverse top. That is happening due to torsion. I am not sure whether that much torsion will be involved in top moments as well as bottom moments.

Kindly help me with this.

Thank you

Regards,

K. Vignesh

Torsion is transferred as moment to pile. The tension from distribution bar must be transferred to the pile rebar.