Occurrence of landsliding on slopes where flowsliding had previously occurred:An investigation in a loess platform,North-west China
作者单位：Institute of Geology and GeophysicsChinese Academy of Sciences Department of Earth SciencesCOMSATS Institute of Information Technology
会议名称：《中国科学院地质与地球物理研究所2013年度（第13届）学术年会》
会议日期：2014年
学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程]
关 键 词：Landslides Numerical modeling Wetting test Constant water content test Slope evolution Loess Plateau
摘 要：Loess slides in South Jingyang platform,Shaanxi Province,usually occur on slopes where loess flowslides had previously occurred,Numerical modeling shows that flowslide occurrence causes conditions that increase shear stress and water content in the subsequent slopes,Both of these factors move the soil stress states towards its theoretical failure line,Under these conditions only small increases in water content can cause soil collapse,This leads to the backscarps of former flowslides being much more prone to landsliding,Wetting test results show that the loess can collapse suddenly as the water content gradually ***, the wetting process induced by continued irrigation may result in the subsequent *** constant water content tests of the loess material soil shear strength increases with the development of specimen deformation, Therefore,slide mobilization,which may be a relatively slow process,is dependent on whether the wetting conditions exist,Finally,a slope evolution model for loess platforms is proposed in this study,