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Advances in Civil Engineering
Volume 2018, Article ID 6128401, 16 pages
https://doi.org/10.1155/2018/6128401
Research Article

Stability and Failure Mechanism Analyses of the Zhenggang Landslide in Southwestern China

1College of Transportation Science & Engineering, Nanjing Tech University, Nanjing 211800, China
2Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China
3Department of Civil Engineering, Ryerson University, Toronto, ON, Canada M5B 2K3

Correspondence should be addressed to Shengnian Wang; moc.liamxof@gnaw.naingnehs

Received 22 August 2017; Revised 27 December 2017; Accepted 15 January 2018; Published 20 March 2018

Academic Editor: Giovanni Garcea

Copyright © 2018 Shengnian Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The Zhenggang landslide is an ancient complex landslide located at southeastern Tibetan Plateau, China. Due to intensive rainfalls in 2008 and heavy snowfalls in 2009, the Zhenggang landslide exhibited a high probability of reactivation once again. In this study, geological structure, matter features, and macrodeformations of the Zhenggang landslide (including Zone I and Zone II) were investigated for uncovering its formation mechanism and evolution tendency first, and then the stability and failure mechanism analyses of the Zhenggang landslide were conducted in detail by a combined limit equilibrium and finite element analysis method. Results of geological investigations indicate that the Zhenggang landslide has undergone sliding several times and is in a metastable state now. The distribution of the activity of the landslide is a retrogressive landslide in Zone I but an advancing landslide in Zone II. Such conclusions are further proved by the numerical stability and failure analyses.