Numerical analysis of downward progressive landslides in long natural slopes with sensitive clay

作     者：Yujia Zhang Xue Zhang Xifan Li Aindra Lingden Jingjing Meng Yujia Zhang;Xue Zhang;Xifan Li;Aindra Lingden;Jingjing Meng

作者机构：Department of Civil and Environmental EngineeringUniversity of LiverpoolLiverpoolUK Department of CivilEnvironmental and Natural Resources EngineeringLuleåUniversity of TechnologyLuleaSweden 

出 版 物：《Journal of Rock Mechanics and Geotechnical Engineering》 (岩石力学与岩土工程学报（英文）)

年 卷 期：2024年第16卷第10期

页      面：3937-3950页

核心收录：

学科分类：08[工学] 080104[工学-工程力学] 0815[工学-水利工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：support provided by the UK Engineering and Physical Sciences Research Council(EP/V012169/1) 

主　　题：Sensitive clay landslides Long natural slopes Translational progressive failure Flow slides Spread Nodal integration-based particle finite element method(N-PFEM) 

摘      要：Landslides occurring in sensitive clay often result in widespread destruction,posing a significant risk to human lives and property due to the substantial decrease in undrained shear strength during *** the consequences of these landslides is challenging and necessitates robust numerical methods to comprehensively investigate their failure *** studies have extensively explored upward progressive landslides in sensitive clays,understanding downward progressive cases remains *** this study,we utilised the nodal integration-based particle finite element method(NPFEM)with a nonlinear strain-softening model to analyse downward progressive landslides in sensitive clay on elongated slopes,induced by surcharge loads near the *** focused on elucidating the underlying failure mechanisms and evaluating the effects of different soil parameters and strainsoftening *** simulation results revealed the typical pattern for downward landslides,which typically start with a localised failure in proximity to the surcharge loads,followed by a combination of different types of failure mechanisms,including single flow slides,translational progressive landslides,progressive flow slides,and spread ***,inclined shear bands occur within spread failures,often adopting distinctive ploughing patterns characterised by triangular *** sensitive clay thickness at the base,the clay strength gradient,the sensitivity,and the softening rate significantly influence the failure mechanisms and the extent of diffused ***,some of these effects mirror those observed in upward progressive landslides,underscoring the interconnectedness of these *** study contributes valuable insights into the complex dynamics of sensitive clay landslides,shedding light on the intricate interplay of factors governing their behaviour and progression.