Influence of different soil properties on the failure behavior of deposit slope under earthquake after rainfall

作     者：YANG Bing HOU Jiang-rong ZHOU Zi-hong GOU Jin-cheng YANG Bing;HOU Jiang-rong;ZHOU Zi-hong;GOU Jin-cheng

作者机构：School of Civil EngineeringSouthwest Jiaotong UniversityChengdu610031China 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2023年第20卷第1期

页      面：65-77页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：Sichuan Provincial Science and Technology Plan Project(2021YFS0323,) National Key Research and Development Program(2021YFB2301203) 

主　　题：Failure mode Failure mechanism Deposit slope Soil properties Earthquake after rainfall 

摘      要：In this study,the influence of soil properties on the failure behavior and mechanism of slope under earthquake after rainfall was studied with shaking table test in the laboratory,in which the failure process of slope and instant responses of water content and pore water pressure were *** on the principle of similarity,a model test was *** experimental results showed that soil properties exhibit significant influence on failure mode and failure mechanism of *** flowslide,local failure,and creep flowslide failure modes appear in the slope exposed to only ***,under earthquake after rainfall,the other three failure modes occur,i.e.,local slip failure,overall slip failure,and shallow scouring and creep flowslide *** spatial distribution of water content and pore water pressure are the two key factors leading to slope ***,due to the difference of permeability,the soil properties not only affect the spatial distribution of water content of the slope after rainfall,resulting in the peak pore water pressure which occurs mainly near the foot of the slope and near the bedrock interface in the middle and lower parts of the slope,but also affect the dissipation of excess pore water pressure in the process of ***,it is discovered that different types of soil lead to significant differences in the peak acceleration of slope *** critical acceleration of slope with coarse-grained soil is greater than that of slope with fine-grained *** critical acceleration of slope failure shows a close relationship with soil properties.