A calculation model of boundary breaking depth for multilevel failure of anti-dip rock slopes
WANG Yang1，WEI Yufeng1，HE Congxi1，JIN Leilei2，LIANG Peng1
(1. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection，Chengdu University of Technology，Chengdu，Sichuan 610059，China；2. State Key Lab of Hydraulics and Mountain River Engineering，Sichuan University，
Chengdu，Sichuan 610065，China)
Abstract：At present，there are relatively few studies on the fracture depth and evolution process of multi-level failure of slopes. In order to solve such problems，the limit equilibrium theory of the cantilever beam is used on the basis of the existing failure boundary model to deduce the fracture depth of the multi-level failure boundary of slopes，a calculation model of the fracture depth of the multi-level failure boundary is established，and the reliability and applicability of the model are verified through large-scale centrifugal simulation tests and engineering examples. The results show that the evolution process of the multi-level failure boundary shown by the centrifugal simulation test is consistent with the proposed calculation model. According to calculation results by the proposed model，the fracture depth of the secondary failure boundary is 215.35 mm，and the fracture depth of the third-level failure boundary is 87.39 mm，which are consistent with the centrifuge test results. Calculation results of an anti-dip rock slope on the left bank of the Lancang River in Yunnan Province buy using the calculation model show that the fracture depth of the first-level failure boundary is 8.06 m and the third-level failure boundary is 2.34 m. The field measurements of the second-level and third-level failure boundaries are 6–10 m and 0.5–2 m respectively. The calculated results are consistent with the actual measuring values. The research results have theoretical guiding significance for the analysis of the stability and failure mechanism of the anti-dip layered rock slope.
王 洋1，魏玉峰1，贺琮栖1，金磊磊2，梁 彭1. 反倾岩质边坡多级破坏边界折断深度计算模型[J]. 岩石力学与工程学报, 2023, 42(3): 630-639.
WANG Yang1，WEI Yufeng1，HE Congxi1，JIN Leilei2，LIANG Peng1. A calculation model of boundary breaking depth for multilevel failure of anti-dip rock slopes. , 2023, 42(3): 630-639.
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2023, Vol. 42 
