Failure mechanism and stability analysis method of the Xiyu conglomerate slope
WANG Yujie1, SUN Ping1, LI Wenxin2, ZHANG Qiang1
1. Key Laboratory on Construction and Safety of Hydraulic Engineering of Ministry of Water Resources, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; 2. Xinjiang Water Conservancy and Hydropower Investigation and Design Institute, Urumqi 830000, China
Abstract：Because the Xiyu conglomerate slope is commonly encountered in the construction of hydraulic projects in Xinjiang, its specific deformation characteristics and failure mechanism were studied through field investigation and discrete element method (DEM) numerical simulation analysis. A stability analysis method that is compatible with the deformation and failure mechanism was proposed according to force and moment balance analysis. The influence of erosion and crack depths on slope stability was analyzed. Results indicate that the failure process of the Xiyu conglomerate slope generally shows the characteristic of "slope toe erosion-tension crack at crown-staggered collapse." This can be divided into four evolutionary stages:slope toe erosion, local collapse, local collapse aggravated, and vertical tension crack formation. As the erosion or crack depth increases, the dumping safety factor of the slope decreases.
王玉杰, 孙平, 李文新, 张强. 西域砾岩边坡破坏机制及稳定分析方法[J]. 清华大学学报（自然科学版）, 2021, 61(8): 863-872.
WANG Yujie, SUN Ping, LI Wenxin, ZHANG Qiang. Failure mechanism and stability analysis method of the Xiyu conglomerate slope. Journal of Tsinghua University(Science and Technology), 2021, 61(8): 863-872.
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2021, Vol. 61 
