A new Model for The Dynamic Interaction of Pile and Pile End Soil

摘要

Allowing for the shortcomings of the existing dynamic interaction models of pile and pile end soil, this paper presented a new model to simulate the dynamic interaction of pile and pile end soil, namely, fictitious soil pile model. At first, finite soil layers below pile end are modeled as fictitious soil pile whose cross-section area is the same as that of the pile. Meanwhile, the surrounding soil layers of pile are modeled by using plane strain model. Then, the semi-analytical solution of longitudinal dynamic response at the pile head in time domain is derived by means of Laplace transform and impedance function transfer method. Based on this solution, a parametric study is conducted to study the influence of parameters of soil below pile end on the longitudinal dynamic response at the pile head.