静压单桩挤土位移的有限元分析  

Finite element analysis of compacting displacements of single jacked pile

作　　者：鹿群[1] 龚晓南[1] 崔武文[2] 张克平 许明辉 

机构地区：[1]浙江大学土木工程系,杭州310027 [2]河北工业大学土建学院,天津300132 [3]绍兴地基基础测试技术研究所,浙江绍兴312030

出　　处：《岩土力学》2007年第11期2426-2430,共5页Rock and Soil Mechanics

基　　金：天津市自然基金(No.06YFJMJC05700)资助

摘　　要：在大型通用软件ANSYS平台上,对静力压桩的连续贯入全过程进行有限元模拟,并对静压单桩的挤土位移进行详细地分析,给出了桩土模量比、桩土间摩擦系数、土体泊松比对挤土位移场的影响规律。利用位移贯入法使桩体贯入,考虑了弹塑性本构关系、自重应力场、大变形和桩-土滑动摩擦等复杂问题,更符合静力压桩的实际,具有仿真效果。The complete process of successive penetration of single jacked pile is simulated with finite element method based on the commonly used large-scale software ANSYS; and compacting displacements are analyzed in detail. The displacement fields caused by different modulus ratios of pile to soil, frictions between pile and soil and Poisson＇s ratios of soil are given. Some complex problems, such as elastoplastic constitutive law, stress field of soil＇s dead weight, large deformation and sliding friction between pile and soil, are taken into account by using the displacement penetration method which is more reality and has the effect of animated simulation.

关 键 词：静压单桩 挤土位移 有限元分析 位移贯入法 

分 类 号：TU43[建筑科学—岩土工程] TB115[建筑科学—土工工程]