RESEARCH ON RELATIONSHIP BETWEEN FAULT MOVEMENT AND LARGE-SCALE LANDSLIDE IN INTENSIVE EARTHQUAKE REGION
ZHANG Yongshuang1,2,SU Shengrui3,WU Shuren1,2,SHI Jusong1,2,SUN Ping1,2,
YAO Xin1,2,XIONG Tanyu1,2
(1. Key Laboratory of Neotectonic Movement and Geohazard,Ministry of Land and Resources,Beijing 100081,China;2. Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China;3. School of Geological Engineering and Surveying, Chang?an University,Xi?an,Shaanxi 710054,China)
Abstract:The relationship between active fault zone and large-scale landslides is a major issue on which people always concern. Based on field investigation of active fault zones and large-scale landslides induced by Wenchuan Ms 8.0 earthquake,the geological setting for large-scale landslides initiation in the Longmenshan active fault zones is documented,and the characteristics of distribution,shape,initiation and segmentation,as well as their influential factors,are summarized. Taking the Xiejiadianzi landslide-debris flow near the central Longmenshan fault zone as an example,simulations of the processes of landslide starting and fast slipping have been carried out by the discrete element method(DEM). It is thought that the disaster result of a rapid and long run-out landslide are dominated by the starting style,debris flying route and dumpling features. This research provides important information for the realization of the relationship between the fault movement and the formation of large-scale landslides,as well as prediction of the disaster result caused by earthquake landslides.
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