Nonlinear Analysis of Counterforce on Pile Head and Sedimentation Characteristics in the Layered Soil

The analysis on the bearing capacity and the displacement characteristics of the pile-raft foundation,especially variable rigidity analysis for balance settlement which is based on interaction analysis of pile-soil-raft and aiming at reducing the displacement difference of the raft,is the difficult and focal point of common attention in the design of the pile-raft foundation.Used the nonlinear interaction analytical method and program,the displacement characteristics of the raft and the counterforce and its distribution on the pile head are analyzed when the thickness of the raft and the spacing,the length,the diameter of the pile are changed,and some valuable conclusions are obtained in this paper.Based on the conclusions obtained in this paper,the pile-raft foundation can be designed with the variable rigidity design method for balance settlement and the objective of reducing the displacement difference of the raft can be realized.