Influence of Anisotropy and Nonhomogeneity on Stability Analysis of Slurry-Support Trenches
Publication: International Journal of Geomechanics
Volume 18, Issue 5
Abstract
A method for assessing the stability of slurry-supported trenches considering anisotropy and nonhomogeneity using the upper-bound theorem of limit analysis is presented. Only anisotropy and the nonhomogeneity of the cohesion were taken into account in this study. The influence of anisotropy and nonhomogeneity on trench stability was investigated via parametric studies. A series of stability charts was obtained for slurry-supported trenches. It is shown that the results obtained from the upper-bound solutions agree well with those obtained through the variational limit-equilibrium closed-form solutions in isotropic and homogeneous trenches. This article first describes the influences of anisotropy and nonhomogeneity on the required unit weight of slurry, and then the procedures for getting the factor of safety are presented. In addition, the influence of anisotropy and nonhomogeneity on the shape of the trench critical failure surface and on the location of the slip surface of the sliding mass is decribed. The article also gives examples to illustrate the variation in the safety factor with trench depth under different anisotropy and nonhomogeneity conditions.
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Acknowledgments
This research was supported by the National Natural Science Foundation of China (Grants 41630638, 51639002, and 51378472), the National Key Research and Development Program of China (Grant 2016YFC0800205), the National Key Basic Research Program of China (973 Program; Grant 2015CB057901), the Program of Introducing Talents of Discipline to Universities (111 Project; Grant B13024), and the Public Service Sector R&D Project of Ministry of Water Resource of China (Grant 201501035-03). The financial support is greatly appreciated. Finally, the insightful comments and suggestions from the anonymous reviewers and the editor are sincerely appreciated.
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Published In
International Journal of Geomechanics
Volume 18 • Issue 5 • May 2018
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© 2018 American Society of Civil Engineers.
History
Received: Aug 4, 2017
Accepted: Nov 28, 2017
Published online: Mar 13, 2018
Published in print: May 1, 2018
Discussion open until: Aug 13, 2018
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