汶川大地震山地灾害发育的控制因素分析  

ANALYSIS OF THE CONTROLLING FACTORS ON GEO-HAZARDS IN MOUNTAINOUS EPICENTER ZONES OF THE WENCHUAN EARTHQUAKE

作　　者：王运生[1] 罗永红[1] 吉峰[1] 霍俊杰[1] 吴峻峰[1] 徐鸿彪[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059

出　　处：《工程地质学报》2008年第6期759-763,共5页Journal of Engineering Geology

基　　金：国家自然科学基金(40472143;D0214);国家重点基础研究发展计划课题"强震作用下斜坡失稳破坏机理及分布规律"(2008CB425801)资助

摘　　要：汶川大地震震后地质灾害调查结果表明,龙门山山地灾害无论是空间分布还是在剖面分布上均具有明显的不均一性:平面上集中在发震断裂及非发震断裂及其附近,剖面上集中在坡顶、坡折及孤立的突出地形上;运动形式具有加速起飞-滑翔-俯冲着陆三阶段。主要受控因素有发震断裂、高烈度、地震持续时间、斜坡地形效应、岩性及结构等。Our to the mountainous epicenter zones of the Wenchuan Earthquake shows that the geo- hazard distribution in the Longmen Shan is heterogeneous on both horizontal and vertical directions. The geohazards are concentrated along the seismic fractures and non - seismic fractures in horizontal and at the top, river shoulders and isolated topography in vertical. The movement process can be divided into three stages of zero - length accelerated launching, gliding and - landing. The development of the geo - hazards is controlled by the seismic fracture, high intensity, duration of the earthquake, topography effects, the composed lithology and textures of the mountainous slopes.

关 键 词：汶川地震 山地灾害 发育特征 控制因素 

分 类 号：P694[天文地球—地质学]