Failure Mechanisms of Post-Earthquake Bedrock Landslides in Response to Rainfall Infiltration

作     者：WU Yong HE Siming LUO Yu LI Xinpo WU Yong,HE Siming,LUO Yu,LI Xinpo Key laboratory of Mountain Hazards and Earth Surface Process,Chinese Academy of Sciences,Chengdu 610041,China Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610041,China

作者机构：Key laboratory of Mountain Hazards and Earth Surface Process Chinese Aeademy of Sciences Chengdu 610041 China Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 China 

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

年 卷 期：2011年第8卷第1期

页      面：96-102页

核心收录：

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] 

基　　金：supported by The National Basic Research Program of China (also called 973 Program) (Grant No. 2008CB425802) the National Natural Science Foundation of China (Grant No. 40872181) 

主　　题：Post-earthquake Fracture infiltration Fracture mechanics Propagation and coalescence Upper boundary theorem Energy theory Rock landslide 

摘      要：Among the triggering factors of postearthquake bedrock landslides, rainfall plays an important role. However, with slope variation, the mechanism of its effects on the failure of rock landslides is not dear. Here, from the viewpoint of fracture mechanics, and based on post-earthquake conditions, the mechanisms of crack propagation, water infiltration and development of the sliding surface were investigated. Then, according to the upper boundary theorem, the effects of water infiltrated into fractures on the stability of rock slopes were analyzed quantitatively. Finally, an example is presented to verify the theory. The results show that the propagation and coalescence of cracks and the lubrication of incipient sliding surfaces are the main causes of the failure of post-earthquake rock landslides in response to rainfall.