竖向荷载作用下群桩基础沉降的时效分析  

Research on Group Pile Settlement under Vertical Load Considering Time Effect

作　　者：李忠诚[1] 张伟[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092

出　　处：《地下空间与工程学报》2005年第5期765-767,772,共4页Chinese Journal of Underground Space and Engineering

摘　　要：采用Biot固结方程和修正的考马拉—黄模型相耦合的分析方法,对竖向荷载作用下的桩筏基础进行分析。用Biot固结理论模拟土体固结,以修正的考马拉—黄模型模拟土体流变,全面呈现了桩筏基础受荷变形的全过程,并通过分析群桩的沉降变形和时间的关系、桩侧摩阻力和桩顶应力的变化、孔压增长和消散的规律得出了一些有益的结论。The coupled method of Biot consolidation theory and modified Kommala- huang model is employed in this paper to perform a theoretical analysis on pile raft foundation. The Biot consolidation theory is used to simulate the soft consolidation and the modified Kommala - huang model to simulate the soil theology; the deformation process of pile raft foundation under longtime loads is fully presented. Through the analysis of increasing and dissipation of soft pore pressure, settlement with time, and variation of pile profile frictional resistance, some useful conclusions are drawn.

关 键 词：群桩 沉降 BIOT固结 流变模型 粘弹塑性 

分 类 号：TU473.1[建筑科学—结构工程]