基础刚度对刚性桩复合地基性状的影响分析  

Influence of foundation rigidity on behavior of composite ground improved by rigid piles

作　　者：俞建霖[1] 朱普遍 刘红岩[3] 龚晓南[1] 

机构地区：[1]浙江大学岩土工程研究所,杭州310027 [2]广宇集团股份有限公司,杭州310006 [3]杭州浙华建筑设计事务所,杭州310012

出　　处：《岩土力学》2007年第S1期833-838,共6页Rock and Soil Mechanics

基　　金：东南大学混凝土及预应力混凝土结构教育部重点实验室资助项目(No.200608)。

摘　　要：为了分析基础刚度对刚性桩复合地基性状的影响,采用数值方法,考虑基础弹性模量、基础厚度和宽度等因素,研究了基础刚度对复合地基桩土应力比、桩侧摩阻力以及桩端刺入量等性状的影响,提出了基础相对刚度系数Ke,并根据不同基础刚度下桩土应力比的变化趋势,将基础分为柔性、半柔性和刚性基础3类。通过工程实例分析,说明所提出的方法具有较好的适用性。To analyze the influence of foundation rigidity on the behavior of composite ground improved by rigid piles,FEM is used in this paper to study the influence of foundation rigidity on the stress ratio of pile to soil,friction resistance and the penetrating displacement of pile. And the parameter Ke which reflects the relative rigidity of foundation is proposed. Then by analyzing the development of stress ratio of pile to soil under different value Ke,the foundations are divided into three kinds————flexible foundation,half-flexible foundation and rigid foudation. Finally through a case study,applicability of the presented method is proved.

关 键 词：基础刚度 刚性桩复合地基 性状 

分 类 号：TU473.1[建筑科学—结构工程]