土层压缩模量的选取对地基变形计算的影响  

Effect of Modulus Selection on the Deformation of Foundation Soil

作　　者：孙训海[1] 雷晓雨[2] 佟建兴[1] 王明山[1] 

机构地区：[1]中国建筑科学研究院地基所,北京100013 [2]天津大学建筑工程学院,天津300072

出　　处：《建筑科学》2010年第9期40-43,共4页Building Science

摘　　要：地基的变形计算一般采用规范推荐的分层总和法,分层总和法用到一个非常重要的参数Es,即各层土的压缩模量,模量的选取直接关系到计算结果的可靠性,本文通过公式推导及工程实例指出目前地基设计中存在的问题——模量Es常选取的是Es1-2,没有按照规范要求选取,由此导致了计算变形值远远大于实测值,影响设计方案的选择。The layer-wise summation method recommended by the code is widely used for the evaluation of deformation of foundation soil.In this method,the selection of compression modulus of each layer is of vital importance,because the reliability of the results of computation depends on it greatly.In this paper,based on the formula derivation and illustration of project example,it is concluded that Es1-2 is commonly selected as Es in the current foundation design.If Es is not selected according to the code,the computed deformation will be larger than the measured value,which will affect the design scheme.

关 键 词：地基 变形计算 分层总和法 压缩模量 

分 类 号：TU470.3[建筑科学—结构工程] TU433[建筑科学—土工工程]