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An MPM-FDM coupled method for landslide analysis considering surface-subsurface conjugated water flow

文献类型：期刊论文

作者Zhan ZQ1; Zhou C2; Liu CQ(刘传奇)3
刊名COMPUTERS AND GEOTECHNICS
出版日期2026
卷号189页码:13
关键词Landslides Partial saturation Numerical modelling Surface water Slopes
ISSN号0266-352X
DOI10.1016/j.compgeo.2025.107618
通讯作者Zhou, C.(c.zhou@polyu.edu.hk)
英文摘要The material point method (MPM) can effectively simulate large deformation problems involving hydromechanical coupling, such as rainfall-induced landslides. Current MPM formulations simulate rainfall boundaries by applying either pore water pressure or velocity boundaries directly. This method does not incorporate the effects of surface water ponding and runoff during heavy rainfall. To address this problem, this study proposes a coupled method that integrates the MPM with the finite difference method (FDM) for hydro-mechanical analysis. Underground water flow is modelled using a two-phase, two-point MPM with the Richards equation, while surface water flow is computed by FDM based on shallow water equations. The two models are coupled: the FDM provides the surface water flow velocity and pore water pressure for subsurface flow simulation in the MPM, while the MPM supplies the surface infiltration rate for surface water flow simulation in the FDM. The new method was validated against existing numerical simulations and centrifuge tests. It was found that the new method can effectively capture the interactions between surface and subsurface flows, as well as the shallow landslide involving surface erosion or washout, which existing MPM codes cannot simulate. Parametric studies further reveal that neglecting the coupling effects of surface-subsurface flow predicts deeper sliding surfaces and longer rainfall durations to failure due to the ignorance of surface ponding and positive pore water pressure at the ground surface. Considering surface water flow tends to shift the failure mode from "slide-to-flow" to "flowlike", especially when slope angle is larger and soil permeability is lower.
分类号一类
WOS关键词MATERIAL POINT METHOD ; HYDRAULIC CONDUCTIVITY ; LARGE-DEFORMATION ; INFILTRATION ; SIMULATION ; MODEL
资助项目Hong Kong Research Grants Council[AoE/E-603/18] ; RICRI of PolyU[N-ZH8Q] ; One Hundred Talents Program of the Chinese Academy of Sciences ; National Natural Science Foun-dation of China[12172368]
WOS研究方向Computer Science ; Engineering ; Geology
语种英语
WOS记录号WOS:001566981000002
资助机构Hong Kong Research Grants Council ; RICRI of PolyU ; One Hundred Talents Program of the Chinese Academy of Sciences ; National Natural Science Foun-dation of China
其他责任者Zhou, C.
源URL[http://dspace.imech.ac.cn/handle/311007/103578]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China;
2.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Tsui Tack Kong Young Scholar Civil Engn, Kowloon, Hong Kong, Peoples R China;
3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100090, Peoples R China
推荐引用方式
GB/T 7714		 Zhan ZQ,Zhou C,Liu CQ. An MPM-FDM coupled method for landslide analysis considering surface-subsurface conjugated water flow[J]. COMPUTERS AND GEOTECHNICS,2026,189:13.
APA Zhan ZQ,Zhou C,&刘传奇.(2026).An MPM-FDM coupled method for landslide analysis considering surface-subsurface conjugated water flow.COMPUTERS AND GEOTECHNICS,189,13.
MLA Zhan ZQ,et al."An MPM-FDM coupled method for landslide analysis considering surface-subsurface conjugated water flow".COMPUTERS AND GEOTECHNICS 189(2026):13.

入库方式： OAI收割

来源：力学研究所

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