Risk analysis of two-layer clay slopes considering spatial variability of shear strength

被引：0
|
作者：
Yi S. [1 ,2 ,3 ,4 ]
Yue K.-D. [5 ]
Chen J. [1 ,2 ,3 ,4 ]
Huang J.-H. [1 ,2 ,3 ,4 ]
Li J.-B. [6 ]
Qiu Y.-F. [7 ]
Tian N. [1 ,2 ]
机构：
[1] State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan
[2] University of Chinese Academy of Sciences, Beijing
[3] Hubei Key Laboratory of Geo-Environmental Engineering, Wuhan
[4] The Soft Soil Research Center in Ningbo University of Technology, State Key Laboratory of Geomechanics and Geotechnical Engineering, Ningbo
[5] Changjiang Institute of Survey, Planning Design and Research Co., Ltd., Wuhan
[6] School of Civil Engineering, Guangzhou University, Guangzhou
[7] Power China Zhongnan Engineering Corporation limited, Changsha
来源：
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2021年 / 43卷
关键词：
Anisotropy; Probability of failure; Random field; Risk of failure; Two-layer clay slope;
D O I：
10.11779/CJGE2021S2027
中图分类号：
学科分类号：
摘要：
Anisotropy exists in the spatial variability of soil parameters. Therefore, it is rational to indicate the spatial distribution of slope parameters using anisotropy random fields. Based on the anisotropic random field of shear strength of soil for a two-layer slope, the effects of vertical scales of fluctuation, horizontal scales of fluctuation and coefficient of variation (COV) of soil parameters on the slope failure probability, instability modes and risk assessments are studied. The main conclusions are drawn as follows: with the increase of COV, the risk of slope failure gradually increases. In low-variability soils, there is almost no risks of slope failure. On the whole, the failure probability of slope is consistent with the risk of failure as COV increases. The deep-layer slop mode accounts for a large proportion, but with the increase of COV, the deep-layer slope mode gradually becomes the shallow slope one. When the scale of fluctuation (including horizontal and vertical) increases, the failure probability of slope and risks increase accordingly. However, when the scale of fluctuation exceed a particular size, which is related to the size of the slope, the increasing amplitude of failure probability and risks slows down as the scale of fluctuation increases. © 2021, Editorial Office of Chinese Journal of Geotechnical Engineering. All right reserved.
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页码：112 / 116
页数：4
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