One revised analytical algorithm of settlement calculation for large-diameter pile

According to analysis of the curve of on-site load settlement curve, the different soil conditions of the tip of pile are main factor to affect deformation. The rapid growth stage is in the initial stage of load settlement curve for the tip of pile. Settlement of pile tip is relation on the thickness and characteristic of soil. According to the rule of deformation in the process of pile settlement, the nonlinear load transfer function was proposed to analyze the shear deformation of pile lateral face. The softening model was fit to basic deformation rule of soil. According to the basic conditions of nonlinear softening model for the lateral face and nonlinear hardening model for the tip of pile, the load-settlement equation was deduced, the transfer rule of load was analyzed, and series of result were obtained.