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Volume 41 Issue 2
Mar.  2022
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Article Navigation >  Bulletin of Geological Science and Technology  > 2022  >  41(2): 325-334
Zhou Ke, Huang Xiaocheng, Lei Deyang, Chen Qiunan, Jiang Feifei. Determinations of the critical sliding surface of planar sliding rock slopes and their stability analysis[J]. Bulletin of Geological Science and Technology, 2022, 41(2): 325-334. doi: 10.19509/j.cnki.dzkq.2022.0062
Citation: Zhou Ke, Huang Xiaocheng, Lei Deyang, Chen Qiunan, Jiang Feifei. Determinations of the critical sliding surface of planar sliding rock slopes and their stability analysis[J]. Bulletin of Geological Science and Technology, 2022, 41(2): 325-334. doi: 10.19509/j.cnki.dzkq.2022.0062
shu

Determinations of the critical sliding surface of planar sliding rock slopes and their stability analysis

doi: 10.19509/j.cnki.dzkq.2022.0062
  • Received Date: 08 Jan 2021
    Abstract
  • It is still a difficult problem to determine the sliding surface of a rock slope quickly and accurately because the efficiency and accuracy cannot be met at the same time in traditional searching methods. The limit equilibrium method is widely accepted in the stability analysis of rock slopes. The planar shear sliding model of a rock slope is adopted to characterize the position of the potential sliding surface by the inclination of the sliding surface; the analytical solution of the potential sliding surface of a multistage rock slope under the condition of limit equilibrium is derived based on the extreme value method, and its accuracy is verified combined with the Sau Mau Ping slope in Hong Kong. Furthermore, the system stability of the Dayingpanshan slope in Yibi, Sichuan Province with multiple steps in a highway is analysed. The results show that the slope potential sliding surface inclination determined by this method is in agreement with the practical sliding inclination of the Sau Mau Ping slope. In practical engineering applications, the dip angles of the sliding surface obtained by using the Cuckoo search method and simulated annealing method in Slide software are 38.0° and 37.0°, respectively, and the dip angle obtained by the analytical method in this paper is 34.8°.The Janbu method, Morgenstern-Price method and Sarma method are selected to calculate the corresponding stability coefficients, the results are approximately 1.04. The stability coefficient obtained in this paper is 1.15. The results obtained by this method are basically accurate. Through parameter sensitivity analysis, it is found that with the increase in cohesion, the inclination angle of the slope slip surface decreases, and the stability coefficient also increases. When the internal friction angle increases, the slope slip surface inclination and stability coefficient also increase.

     

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