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

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...

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Bibliographic Details
Published inJournal of Zhejiang University. A. Science Vol. 14; no. 2; pp. 94 - 100
Main Authors Han, Chang-yu, Chen, Jin-jian, Wang, Jian-hua, Xia, Xiao-he
Format Journal Article
LanguageEnglish
Published Hangzhou Zhejiang University Press 01.02.2013
Subjects
Civil Engineering
Classical and Continuum Physics
Cohesion
Engineering
Industrial Chemistry/Chemical Engineering
Mechanical Engineering
Safety
Slurries
Soil (material)
Stability analysis
Three dimensional
Trenches
Two dimensional
学术论文
期刊
编辑工作
英文摘要
Slurry trench
Diaphragm wall
Limit analysis
Stability
TU46
Online AccessGet full text
ISSN1673-565X
1862-1775
DOI10.1631/jzus.A1200257

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Summary: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.
Bibliography:Limit analysis, Stability, Slurry trench, Diaphragm wall
Chang-yu HAN, Jin-jian CHEN, Jian-hua WANG, Xiao-he XIA （Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China）
33-1236/O4
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.
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ISSN:1673-565X
1862-1775
DOI:10.1631/jzus.A1200257