Three-Dimensional Stability Analysis of Excavation Using Limit Analysis  

作　　者：韩长玉 陈锦剑 王建华 夏小和 

机构地区：[1]Department of Civil Engineering,Shanghai Jiaotong University [2]School of Civil Engineering and Architecture,Henan University

出　　处：《Journal of Shanghai Jiaotong university(Science)》2013年第6期646-649,共4页上海交通大学学报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.41002095,41172251 and 41272317)

摘　　要：The theory of limit analysis is presented for a three-dimensional stability problem of excavation. In frictional soil, the failure surface has the shape of logarithm helicoid, with the outline profile defined by a log- spiral curve. The internal dissipation rate of energy caused by soil cohesion and gravity power of the failure soil is obtained through theoretical derivation. By solving the energy balance equation, the stability factor for the excavation is obtained. Influence of the ratio of width to height, the slope angle, and the top angle on the stability is examined. Numerical results of the proposed algorithm are presented in the form of non dimensional graph. Examples illustrate the practical use of the results.The theory of limit analysis is presented for a three-dimensional stability problem of excavation. In frictional soil, the failure surface has the shape of logarithm helicoid, with the outline profile defined by a logspiral curve. The internal dissipation rate of energy caused by soil cohesion and gravity power of the failure soil is obtained through theoretical derivation. By solving the energy balance equation, the stability factor for the excavation is obtained. Influence of the ratio of width to height, the slope angle, and the top angle on the stability is examined. Numerical results of the proposed algorithm are presented in the form of non dimensional graph. Examples illustrate the practical use of the results.

关 键 词：STABILITY LANDSLIDES limit analysis EXCAVATIONS 

分 类 号：TU457[建筑科学—岩土工程] O344.5[建筑科学—土工工程]