基坑开挖土体切线模量取值的研究  

Research on Soil Tangent Modulus of Foundation Pit

作　　者：赵继伟[1] 郭雪莽[2] 于国辉[1] 

机构地区：[1]华北水利水电学院,华北郑州450008 [2]浙江水利水电专科学校,浙江杭州310018

出　　处：《浙江水利水电专科学校学报》2007年第1期1-3,17,共4页Journal of Zhejiang Water Conservancy and Hydropower College

摘　　要：基坑开挖过程中,土体的应力—应变关系不但具有非线性特点,还受应力路径的影响.今对基坑开挖过程中底部和周边土体这两种不同的卸荷应力路径下的应力应变关系进行了区分研究,并分别推导了其切线弹性模量的表达式,用于基坑工程的数值计算,并和常规加荷算法进行比较,结果表明:用本文建立的模量公式计算出的结果更接近工程实际.In the process of excavation of the foundation pits, the stress-strain relationship is not only non-linear, but also is influenced by the stress path. A distinct research for the stress-strain relationship of different unloading stress path of the bottom and surrounding soil in the process of excavation of the foundation pits are investigated, and the equation of tangent modulus of them are deduced respectively. The equation can be implied for the numerical computation of the foundation pit. Compared with the result of general loading computed method, it shows that the results of modulus equation in this paper are closer to the real results.

关 键 词：基坑 卸荷 应力-应变 切线模量 数值计算 

分 类 号：TU431[建筑科学—岩土工程]