Reliability Back Analysis of Shear Strength Parameters of Landslide Considering Mutual-Correlation Between Parameters

doi:10.3969/j.issn.1000-565X.2016.06.019

Journal of South China University of Technology (Natural Science Edition)

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Reliability Back Analysis of Shear Strength Parameters of Landslide Considering Mutual-Correlation Between Parameters

ZHAO Lian-heng¹ ZUO Shi¹ CHEN Jing-yu^1,2 WANG Zhi-bin³

1.School of Civil Engineering，Central South University，Changsha 410075,Hunan,China; 2.School of Railway Tracks and Transportation,East China Jiaotong University,Nanchang 330000,Jiangxi,China; 3.School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,Hunan,China

Received:2015-08-23 Online:2016-06-25 Published:2016-05-03
Contact: 赵炼恒(1980-)，男，副教授，博士生导师，主要从事道路与铁道工程、岩土极限分析理论与应用等的研究． E-mail:zlh8076@163.com
About author:赵炼恒(1980-)，男，副教授，博士生导师，主要从事道路与铁道工程、岩土极限分析理论与应用等的研究．
Supported by:
Supported by the National Natural Science Foundation of China(51208522)，the Foundation of Hunan Provincial Science and Technology Department(2012SK3231，2012TT2039) and the Foundation of Guizhou Provincial Transportation Dapart-ment(2012122033)

Abstract

Abstract: As the traditional deterministic back analysis methods fail to consider the influence of randomness and uncertainty of geotechnical parameters on the slope stability,a new parameter back analysis method with simplicity and practicality,which combines the upper bound method of limit analysis with the reliability theory,is proposed.Then,the feasibility and effectiveness of the proposed method are verified through an engineering application case.The results show that the proposed method not only takes into account the uncertainties and instability of the geotechnical parameters but also helps to implement the back calculation of the shear strength parameters of a slid- ing surface.Meanwhile,the effects of the correlation of shear strength parameters on the back analysis results and the reliability are analyzed,finding that ignoring the mutual-correlation between parameters may lead to a conserva- tive reliability index.

Key words: landslide, shear strength parameter, back analysis, upper bound limit analysis, reliability theory, correlation

ZHAO Lian-heng ZUO Shi CHEN Jing-yu WANG Zhi-bin. Reliability Back Analysis of Shear Strength Parameters of Landslide Considering Mutual-Correlation Between Parameters[J]. Journal of South China University of Technology (Natural Science Edition), doi: 10.3969/j.issn.1000-565X.2016.06.019.

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Reliability Back Analysis of Shear Strength Parameters of Landslide Considering Mutual-Correlation Between Parameters

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