摘要
本文基于COMSOL平台构建非饱和土渗流-应力耦合模型,研究降雨条件下边坡位移响应机制。采用扩展Richards方程和van Genuchten模型模拟非饱和渗流过程,分析坡体饱和度与位移的时空演化规律。结果表明:降雨使饱和度由表层向深层扩展,渗流呈局部向整体饱和发展;位移表现出“快速增长—平稳发展”的双阶段特征,坡顶位移最大,浅层位移大于深层。不同部位变形差异主要源于应力状态与约束条件的差异。研究揭示了降雨-渗流-位移的耦合机制,为滑坡预警监测提供理论支持。未来需进一步考虑降雨异质性与参数优化,以提升预测精度。
This study establishes a seepage-stress coupled model for unsaturated soils on the COMSOL platform to investigate the displacement response mechanisms of slopes under rainfall conditions.The extended Richards equation and Van Genuchten model are employed to simulate unsaturated seepage processes,enabling a comprehensive analysis of spatiotemporal evolution patterns in slope saturation and displacement.Results demonstrate that rainfall induces saturation expansion fromthe surface to deeper soil layers,with seepage progression transitioning from localized to overall saturation.The displacement response exhibits a“rapid growth-stable development”dual-stage pattern,characterized by maximum displacement at the slope crest and greater displacement in shallow layers compared to deeper strata.The deformation disparities among slope regions primarily stem from variations in stress states and constraints.The research elucidates the coupled rainfall-infiltration-deformation mechanisms,offering theoretical support for landslide early warning systems.Future work should incorporate rainfall heterogeneity and parameter optimization to enhance predictive accuracy.
作者
侯金秋
李思齐
李宇博
HOU Jinqiu;LI Siqi;LI Yubo(No.327 Unit,Bureau of Geology and Mineral Exploration of Anhui Province,Hefei,Anhui 230011,China;West-to-East Gas Transmission Branch of China Oil and Gas Pipeline Network Group Co.,Ltd.,Shanghai 200011,China;Geo-environment Monitoring Station of Anhui Province,Hefei,Anhui 230001,China)
出处
《安徽地质》
2025年第4期340-344,共5页
Geology of Anhui
基金
安徽省公益性地质工作项目“巢湖市地质灾害风险调查评价1∶50000”(编号:2021-z-4-17)资助。
关键词
滑坡
非饱和渗流
降雨入渗
位移响应
landslide
unsaturated seepage
rainfall infiltration
displacement response
