3D slope stability analysis considering strength anisotropy by a microstructure tensor enhanced elasto-plastic finite element method  

作　　者：Wencheng Wei Hongxiang Tang Xiaoyu Song Xiangji Ye 

机构地区：[1]State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian,116024,China [2]Department of Civil and Coastal Engineering,University of Florida,Gainesville,FL,USA [3]CCCC First Harbour Consultants Co.,Ltd.,Tianjin,300220,China

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2025年第3期1664-1684,共21页岩石力学与岩土工程学报(英文)

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51890912,51979025 and 52011530189).

摘　　要：This article presents a micro-structure tensor enhanced elasto-plastic finite element(FE)method to address strength anisotropy in three-dimensional(3D)soil slope stability analysis.The gravity increase method(GIM)is employed to analyze the stability of 3D anisotropic soil slopes.The accuracy of the proposed method is first verified against the data in the literature.We then simulate the 3D soil slope with a straight slope surface and the convex and concave slope surfaces with a 90turning corner to study the 3D effect on slope stability and the failure mechanism under anisotropy conditions.Based on our numerical results,the end effect significantly impacts the failure mechanism and safety factor.Anisotropy degree notably affects the safety factor,with higher degrees leading to deeper landslides.For concave slopes,they can be approximated by straight slopes with suitable boundary conditions to assess their stability.Furthermore,a case study of the Saint-Alban test embankment A in Quebec,Canada,is provided to demonstrate the applicability of the proposed FE model.

关 键 词：Strength anisotropy Elasto-plastic finite element method(FEM) Three-dimensional(3D)soil slope Gravity increase method(GIM) Stability analysis Case study 

分 类 号：O17[理学—数学]