群桩基础-土作用非线性有限元分析

Nonlinear Finite Element Analysis of Pile Group Foundation and Soil Action

以实际工程为例,提出了一种弹塑性有限元法并对其进行研究,采用接触单元法构建桩-土三维有限元模型,对桩-土接触进行弹塑性非线性分析,工程施工后满足了施工要求,桥梁桩基在施工期与运营期对防洪堤后填土扰动较小,对防洪堤渗流场及稳定的影响也较小。

Taking the practical project as the example,this paper presents a elastic-plastic FEM,and analyzes on it,using the contact element method to build a pile-soil 3D model,analyzes the elastic-plastic characteristic of the pile-soil contact,and the project construction is completed,and it meets all the requirements of the construction.The pile foundation of the bridge has little disturbance to the soil behind the levee during the construction period and the operation period,and the influence on seepage field and stability of flood dike is also small.