桩底灌浆在桩端周围土体中引起的应力分析  

Analysis of stress in soil mass around pile bottom induced by Grouting

作　　者：黄敏[1] 张克绪[1] 张尔齐[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《哈尔滨工业大学学报》2002年第3期433-435,439,共4页Journal of Harbin Institute of Technology

摘　　要：为研究桩底灌浆在桩端周围土体中引起的应力 ,基于桩底灌浆分析求得压力头梯度分布 ,采用有限元法分析了由灌浆产生的渗透力在桩端周围土体中引起的应力及其分布 .分析结果表明 ,灌浆在周围土体中引起的应力沿径向迅速衰减 ,主要作用范围集中在浆球内 .由于水泥砂或水泥砾石的刚度与强度很高 ,在研究灌浆桩的整体性能时 。Grouting at pile bottom is an inportant engineering measure to improve the capability of pile.The stress in soil mass around pile bottom induced by grouting is a primary factor for the capability of pile.It has been not studied up to present,because of the complex interaction of grout and soil skeleton.Based on the excess hydrostatic pressure gradient obtained by analyzing the grouting,and the stress of soil mass around pile bottom induced by seepage force is analyzed by the finite element method.It is presented that the in the grouting globe.Because of its high rigidity and intensity,the grouting globe is regarded as a part of the pile after solidification for analyzing the bearing behavior of the pile after grouting.

关 键 词：桩端周围土体 应力分析 桩底灌浆 渗透力 浆水分界面 有限元法 桩基 

分 类 号：TU473.1[建筑科学—结构工程]