Potential seismic landslide hazard and engineering effect in the Ya’an-Linzhi section of the Sichuan-Tibet transportation corridor, China  

作　　者：Zhi-hua Yang Chang-bao Guo Rui-an Wu Wei-wei Shao Peng-fei Yu Cai-hong Li 

机构地区：[1]Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China [2]Key Laboratory of Active Tectonics and Geological Safety,Ministry of Natural Resources,Beijing 100081,China [3]State Key Laboratory of Resources and Environmental Information System,Beijing 100101,China [4]China University of Geosciences,Wuhan 430074,China [5]China University of Geosciences(Beijing),Beijing 100083,China

出　　处：《China Geology》2023年第2期228-240,共13页中国地质（英文）

基　　金：supported by the National Natural Science Foundation of China(42277180);China Geological Survey Project(DD20221816);National Key Research and Development Program of China(2021YFB2301403-5);State Key Laboratory of Resources and Environmental Information System.

摘　　要：The Sichuan-Tibet transportation corridor is located at the eastern margin of the Qinghai-Tibet Plateau,where the complex topography and geological conditions,developed geo-hazards have severely restricted the planning and construction of major projects.For the long-term prevention and early control of regional seismic landslides,based on analyzing seismic landslide characteristics,the Newmark model was used to carry out the potential seismic landslide hazard assessment with a 50-year beyond probability 10%.The results show that the high seismic landslide hazard is mainly distributed along large active tectonic belts and deep-cut river canyons,and are significantly affected by the active tectonics.The low seismic landslide hazard is mainly distributed in the flat terrain such as the Quaternary basins,broad river valleys,and plateau planation planes.The major east-west linear projects mainly pass through five areas with high seismic landslide hazard:Luding-Kangding section,Yajiang-Xinlong(Yalong river)section,Batang-Baiyu(Jinsha river)section,Basu(Nujiang river)section,and Bomi-Linzhi(eastern Himalaya syntaxis)section.The seismic action of the Bomi-Linzhi section can also induce high-risk geo-hazard chains such as the high-level glacial lake breaks and glacial debris flows.The early prevention of seismic landslides should be strengthened in the areas with high seismic landslide hazard.

关 键 词：Qinghai-Tibet Plateau Sichuan-Tibet transportation corridor Seismic landslide Hazard assessment Engineering effect 

分 类 号：P315.9[天文地球—地震学] P642.22[天文地球—固体地球物理学]