Stability analysis of rock slopes with double weak interlayers based on upper bound limit analysis

被引：0
|
作者：
Yuan J. [1 ,2 ]
Lu Z. [1 ]
Chen C. [1 ]
Sun C. [1 ]
Fan K. [1 ,2 ]
Liu C. [1 ]
机构：
[1] State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Hubei, Wuhan
[2] University of Chinese Academy of Sciences, Beijing
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2024年 / 43卷 / 02期
基金：
中国国家自然科学基金;
关键词：
double weak interlayers; generalized plastic theory; rock slope stability; sliding mechanism; slope engineering; upper bound method;
D O I：
10.13722/j.cnki.jrme.2023.0297
中图分类号：
学科分类号：
摘要：
Stability of rock slope with weak interlayers is controlled by weak interlayers and rock mass. There are obvious differences in geological model, failure mode and stability analysis method between rock slope with multiple and single weak interlayers. With the employment of associated flow rule for the upper interlayer and non-associated flow rule for the rest, the upper bound method is used to construct sliding mechanism of rock slope with double weak interlayers based on traditional plastic theory and the generalized plastic theory and, thus the calculation method of stability coefficient is proposed in this paper. The minimum value of stability coefficient is solved and corresponding failure mechanism of the slope in the limit equilibrium state is drawn based on the sequential quadratic optimization algorithm through an example from an engineering. Calculation is compared with the results of 3DEC discrete element numerical analysis. The results show that the larger the inclination angle of double weak interlayers is, the closer the sliding surface is to the top of the slope, and the more unstable the slope is. The theoretical method presented in this paper is in good agreement with the numerical results to verify accuracy of proposed method. © 2024 Academia Sinica. All rights reserved.
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页码：412 / 423
页数：11
相关论文
共 43 条
  • [21] ZHENG Yingren, KONG Liang, Elastic-plastic mechanics of rock and soil, pp. 337-340, (2010)
  • [22] LIU Xiaoli, ZHOU Depei, Stability evaluation of slopes with weakly interbedded rock masses, Journal of Southwest Jiaotong University, 37, 4, pp. 382-386, (2002)
  • [23] HUANG Maosong, WANG Haoran, LIU Yilin, Analysis of upper limit of rainfall infiltration stability of soil slopes containing weak interlayer based on combined rotational-planar damage mechanism, Chinese Journal of Geotechnical Engineering, 34, 9, pp. 1561-1567, (2012)
  • [24] WANG Haoran, HUANG Maosong, LIU Yilin, Three-dimensional stability limit analysis of slopes containing soft inclusions, Rock and Soil Mechanics, 34, pp. 156-160, (2013)
  • [25] TANG Zuping, LI Liang, ZHAO Lianheng, Et al., Analysis of upper limit of limit analysis for stability of slopes containing soft inclusions, Journal of Railway Science and Engineering, 11, 2, pp. 60-64, (2014)
  • [26] LI Ji, Study on progressive instability determination and local failure range of bedding slope with multi-layer weak interlayer, (2017)
  • [27] MU Chenglin, PEI Xiangjun, WANG Rui, Et al., Based on the physical model test, the deformation and failure characteristics of high slope with multi-layer weak interlayer excavation are analyzed, Chinese Journal of Geological Disasters and Prevention, 33, 3, pp. 61-67, (2022)
  • [28] WEN Jidong, XU Wanzhong, LIU Zhenxiang, Stability analysis of traction landslide with multi-layer weak interlayer, Low Temperature Building Technology, 38, 9, pp. 101-102, (2016)
  • [29] LONG Jianhui, REN Jie, ZENG Fangui, Et al., Sliding mode and deformation law of rock landslide with double weak interlayer, Coal Journal, 44, 10, pp. 3031-3040, (2019)
  • [30] CHEN Congxin, Evaluation of slope stability of section K164＋080-K164＋540 of the G7611 line from Zhaotong (Sichuan-Yunnan border) to Xichang expressway, (2021)
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