Influences of soil failure criterion on horizontal soil resistance of pile group

Abstract

This paper discussed the influences on soil resistance of a pile group caused by different soil properties and failure criterions. Nonlinear static analyses were performed using 3"dimensional finite element method. The major conclusions of this paper can be summarized as follows- 1) Under the Mohr-Coulomb failure criterion, the strength of sand differs between triaxial compression and triaxial tensile. The difference determines the subgrade reaction of piles. 2) In the case of sandy soil subgrade reaction concentrates on front piles in a pile group. While in the case of cohesive soil, the concentration on front piles is softened by side piles.