Abstract
This paper presents the horizontal soil resistance of pile group foundation by the static analyses using 3-dimensional nonlinear finite element method. Springs both at the pile head and around pile shaft are evaluated and discussed. The major findings obtained from this study are summarized as follows: 1) the horizontal soil resistance is different depending on the location of the pile. 2) soil spring around the pile at the edge of pile group is remarkably influenced by the direction of loading. 3) group-factor of soil spring around the pile is smaller than that of spring at the pile head. 4) when displacement of the pile becomes larger, the difference of soil spring at each pile becomes larger.
