CHEN Q C, WANG A L, WU Z H, et al.Study on stability of gently inclined bedding rock slope with weak interlayer based on cusp catastrophe theory[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(6):188-195.

doi:10.16186/j.cnki.1673-9787.2020090034

Received:2020/09/07

Revised:2021/01/13

Published:2022/11/25

Study on stability of gently inclined bedding rock slope with weak interlayer based on cusp catastrophe theory

CHEN Quanchuan1, WANG Anli2, WU Zhonghu1, ZHU Aijun1,3, LI Lan1, TU Fangrui1

1.College of Civil Engineering，Guizhou University，Guiyang 550025，Guizhou，China；2.Guizhou Quality and Safety Traffic Engineering Monitoring and Testing Center Co.，Ltd.，Guiyang 550000，Guizhou，China；3.Guiyang Architectural Survey Design Co.，Ltd.，Guiyang 550009，Guizhou，China

Abstract:In order to In order to explore the influence of weak interlayer on the stability of gently inclined bedding rock slopes and the influence of overcoming the limitations of using safety factor of slope stability evaluation，a mutation progression method based on the theory of the cusp mutation the stability of the slope was put forward.Six factors，such as cohesion（c），internal friction angle（φ），inclination angle（β），thickness（d），rock mass weight（γ）and void water pressure ratio（γ_u），were selected to conduct a five-level orthogonal test，and a simplified slope model was established.Then the safety factor of the slope was calculated by the strength reduction method and the abrupt transition progression of the experimental slope model was obtained based on the abrupt transition progression method.The results showed that the sensitivity sequence of the six main controlling factors that affected the stability of gently dipping bedding rock slopes with weak interlayers was as φ;β;c;γu;γ;d.The evaluation results of slope stability by abrupt progression method are consistent with strength reduction method and limit equilibrium method，and verified by practical projects.The abrupt progression method was feasible，intuitive and convenient in the stability evaluation of such slopes.The research results could provide guidance for the stability evaluation of this kind of slope.

Key words:cusp cate strophe;orthogonal design;weak interlayer;strength reduction method;slope stability

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