2D and 3D stability analysis of slurry trench in frictional/cohesive soil  

作　　者：Chang-yu HAN Jin-jian CHEN Jian-hua WANG Xiao-he XIA 

机构地区：[1]Department of Civil Engineering,Shanghai Jiaotong University

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2013年第2期94-100,共7页浙江大学学报（英文版）A辑（应用物理与工程）

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

摘　　要：A 2D and 3D kinematically admissible rotational failure mechanism is presented for homogeneous slurry trenches in frictional/cohesive soils.Analytical approaches are derived to obtain the upper bounds on slurry trench stability in the strict framework of limit analysis.It is shown that the factor of safety from a 3D analysis will be greater than that from a 2D analysis.Compared with the limit equilibrium method,the limit analysis method yields an unconservative estimate on the safety factors.A set of examples are presented in a wide range of parameters for 2D and 3D homogeneous slurry trenches.The factor of safety increases with increasing slurry and soil bulk density ratio,cohesion,friction angle,and with decreasing slurry level depth and trench depth ratio,trench width and depth ratio.It is convenient to assess the safety for the homogeneous slurry trenches in practical applications.A 2D and 3D kinematically admissible rotational failure mechanism is presented for homogeneous slurry trenches in frictional/cohesive soils. Analytical approaches are derived to obtain the upper bounds on slurry trench stability in the strict framework of limit analysis. It is shown that the factor of safety from a 3D analysis will be greater than that from a 2D analysis. Compared with the limit equilibrium method, the limit analysis method yields an unconservative estimate on the safety factors. A set of examples are presented in a wide range of parameters for 2D and 3D homogeneous slurry trenches. The factor of safety increases with increasing slurry and soil bulk density ratio, cohesion, friction angle, and with decreasing slurry level depth and trench depth ratio, trench width and depth ratio. It is convenient to assess the safety for the homogeneous slurry trenches in practical applications.

关 键 词：Limit analysis STABILITY Slurry trench Diaphragm wall 

分 类 号：TU46[建筑科学—结构工程]