基于CEL的灵敏性黏土斜坡渐进破坏数值模拟研究  

Numerical simulation of progressive failure of sensitive clay slopes using CEL method

作　　者：沈佳轶[1,2] 陈前 库猛 王立忠[1,2] SHEN Jia-yi;CHEN Qian;KU Meng;WANG Li-zhong(Ocean College,Zhejiang University,Zhoushan 316000,China;Key Laboratory of Offshore Geotechnics and Material of Zhejiang Province,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学海洋学院,浙江舟山316000 [2]浙江大学浙江省海洋岩土工程与材料重点实验室,浙江杭州310058

出　　处：《岩土工程学报》2022年第12期2297-2303,I0029,F0004,共9页Chinese Journal of Geotechnical Engineering

基　　金：中央高校基本科研业务费专项基金项目(2021QNA4037);国家自然科学基金项目(51939010)。

摘　　要：为了揭示灵敏性黏土斜坡渐进破坏机理,以加拿大Saint-Jude滑坡为研究案例,采用耦合欧拉-拉格朗日(Coupled Eulerian-Lagrangian,CEL)框架下的欧拉方法,开展灵敏性黏土斜坡渐进破坏数值模拟研究。研究结果表明:CEL数值模拟得到的Saint-Jude滑坡地形与现场勘测滑坡地形基本一致;CEL数值模拟方法可以有效地模拟灵敏性黏土斜坡从初始失稳破坏到后续渐进破坏的全过程,真实还原Saint-Jude滑坡的渐进破坏模式;CEL数值模拟方法有效地模拟灵敏性黏土斜坡渐进破坏过程中剪应力的演化特征,从而揭示灵敏性黏土斜坡渐进破坏机理。In order to reveal the mechanism of the progressive failure of sensitive clay slopes,the Saint-Jude landslide in Canada is used as a research case,and the Eulerian approach under the coupled Eulerian-Lagrangian(CEL)framework is used to carry out the numerical simulation.The research results show that:(1)The topography of the Saint-Jude landslide obtained by the CEL numerical simulation is basically consistent with the field surveyed one.(2)The CEL numerical simulation method can effectively simulate the sensitive clay landslides from the initial instability failure to the subsequent progressive failure,and the progressive failure mode of the Saint-Jude landslide can be truly simulated.(3)The CEL numerical simulation method effectively captures the characteristics of shear stress during the progressive failure of the sensitive clay slope,thereby revealing the mechanism of progressive failure of sensitive clay slopes.

关 键 词：灵敏性黏土 应变软化 Saint-Jude滑坡 渐进破坏 CEL数值分析 

分 类 号：TU43[建筑科学—岩土工程]