the large piles group, were evaluated using a three-dimensional finite-difference program:FLAC3D. The case of large pile group under lateral loading was took into account, hypothesing that a rigid pile caps,the base of which is located at the groundline was to ensure equal lateral displacements of the whole pile heads. Reseach endeavor concertrated on local pile-soil interaction using p-y curves as the primary assessing tool and p-multipliers to represent the group effects. Study efforts were then preceded ...