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Trench stability under bentonite pressure in purely cohesive clay

Li,AJ, Merifield,RS, Lin,HD and Lyamin,AV 2014, Trench stability under bentonite pressure in purely cohesive clay, International journal of geomechanics, vol. 14, no. 1, pp. 151-157, doi: 10.1061/(ASCE)GM.1943-5622.0000292.

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Title Trench stability under bentonite pressure in purely cohesive clay
Author(s) Li,AJ
Merifield,RS
Lin,HD
Lyamin,AV
Journal name International journal of geomechanics
Volume number 14
Issue number 1
Start page 151
End page 157
Total pages 7
Publisher American Society of Civil Engineering
Place of publication Reston, Va.
Publication date 2014-02
ISSN 1532-3641
Keyword(s) Diaphragm wall
Excavation
Limit analysis
Safety factor
Three dimensional
Science & Technology
Technology
Engineering, Geological
Engineering
DIAPHRAGM WALL INSTALLATION
LIMIT ANALYSIS-METHODS
SLOPE STABILITY
SLURRY TRENCH
PULLOUT CAPACITY
FINITE-ELEMENTS
SOIL
ANCHORS
CONSTRUCTION
Summary Trench stability is a conventional geotechnical problem; however, current evaluations are often based entirely on empiricism. This paper uses numerical finite-element upper and lower bound limit analysis to produce stability charts for two-dimensional and three-dimensional homogeneous and inhomogeneous undrained diaphragm wall trenches. Using the limit theorems cannot only provide a simple and useful way of analyzing the stability of the trench, but also avoid the shortcomings and arbitrary assumptions underpinning the limit equilibrium method. By considering the effects from the bentonite slurry pressures, the collapse load in this study has been bracketed to within ±8.5 or better by the numerical upper and lower bound limit analyses. The chart solutions can be used to predict either the critical depth or the safety factor of the trench and provide a convenient tool for preliminary designs by practicing engineers. © 2014 American Society of Civil Engineers.
Language eng
DOI 10.1061/(ASCE)GM.1943-5622.0000292
Field of Research 090501 Civil Geotechnical Engineering
Socio Economic Objective 870101 Civil Construction Planning
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, American Society of Civil Engineering
Persistent URL http://hdl.handle.net/10536/DRO/DU:30071548

Document type: Journal Article
Collection: School of Engineering
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