刚柔性基础下复合地基桩土应力比的对比试验研究  

Experimental Research on the Pile-Soil Stress Ratio of Composite Ground under Rigid and Flexible Foundations

作　　者：郭院成[1] 郭呈祥 张四化[1] 李永辉[1] 王卫中[1] 

机构地区：[1]郑州大学土木工程学院,郑州450001 [2]濮阳专业技术学院,河南濮阳457000

出　　处：《建筑科学》2008年第9期35-37,34,共4页Building Science

基　　金：河南省科技攻关项目资助(0624220010)

摘　　要：桩土应力比是复合地基承载性能中的重要技术指标,基础刚度及桩体变形刚度是影响复合地基桩土应力比的关键因素之一。本文通过现场试验研究对比分析了刚性基础与柔性基础条件下,长短桩复合地基的桩土应力比的变化规律,总结了基础刚度及桩体变形刚度对复合地基桩土应力比的影响规律,对实际工程中有效提高复合地基桩土应力比、降低地基沉降变形具有理论和工程指导意义。Pile-soil stress ratio is an important parameter in the design of the composite ground, and it is affected by foundation stiffness and pile deformation stiffness. Based on the experiments, the authors compare analyze the change law of the pile-soil stress ratio of rigid longshort-pile composite foundation under rigid ground and flexibility ground, and summarize the influential law of the pile-soil stress ratio under different foundation stiffness and pile deformation stiffness. The conclusion can be of theory and practice significance for the engineering which need effectively to improve the pile-soil stress ratio and to lower the settlement deformation.

关 键 词：复合地基 桩土应力比 试验研究 基础刚度 

分 类 号：TU473.1[建筑科学—结构工程] TU413[建筑科学—土工工程]