Failure mechanism and stability analysis of the Zhenggang landslide in Yunnan Province of China using 3D particle flow code simulation  

作　　者：SHI Chong LI De-jie CHEN Kal-hua ZHOU Jia-wen 

机构地区：[1]Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China [2]Institute ofC,eotechnical Research,Hohai University,Nanjing 210098,China [3]State Key Laboratory of Hydraulics and Mountain River Engineering,$iehuan University,Chengdu 610065,China

出　　处：《Journal of Mountain Science》2016年第5期891-905,共15页山地科学学报（英文）

基　　金：The National Natural Science Foundation of China(Grants Nos.51309089,41472272 and 11202063);the National Key Technology R&D Program(Grant No.2013BAB06B00);the Natural Science Foundation of Jiangsu Province(Grant No.BK20130846);the Fundamental Research Funds for the Central Universities(Grant No.2015B06014)supported this work

摘　　要：Based on the principle of 3D particle flow code,a numerical landslide run-out model is presented to simulate the failure process of the Zhenggang landslide(in southwestern China) under the effect of water after a rainfall.The relationship between the micro-mechanical parameters and the macro-shear strength of the grain material is determined through numerical calibrations.Then the rainfall effect is considered in numerical simulations and rain-induced sliding processes are performed,which help us to discuss the mechanism of deformation and failure of this landslide together with field observations.It shows the Zhenggang landslide would most likely be activated in Zone I and would gain momentum in Zone II.In order to prevent the potential disaster,a tailing dam is advised to be designed about 175 m downstream from the current landslide boundary of Zone II.Verified by field observations,the presented landslide model can reflect the failure mechanism after rainfall.It can also provide a method to predict the potential disaster and draft disaster prevention measures.

关 键 词：Back analysis Deposit avalanche Dynamic process LANDSLIDE Particle flow code 

分 类 号：P642.22[天文地球—工程地质学]