强震触发大光包巨型滑坡运动特征研究  

A study of motion features of the Daguangbao large-scale landslide induced by the Wenchuan Earthquake

作　　者：李天涛[1] 裴向军[1] 黄润秋[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,四川成都610059

出　　处：《水文地质工程地质》2014年第2期116-121,128,共7页Hydrogeology & Engineering Geology

基　　金：科技部支撑计划(2011BAK12B03);四川省科技创新团队项目(2011JTD012);国土资源部公益性行业专项(201211055)

摘　　要：文章主要研究了在强震触发下大光包滑坡在不同下滑阶段的运动特征以及响应速度问题。强震作用触发大光包滑坡体启程剧冲,继而在重力作用下沿滑面加速下滑,而后又与山体碰撞转化为碎屑流,整个运动过程中有明显的岩体抛射、前缘岩体反翘超覆以及岩块"推挤出槽"等现象。根据其运动特征,将滑体运动过程分为三个阶段,分别为主体滑动阶段、次级滑动阶段、碎屑流运动阶段,并运用静力分析法、能量法、碎屑流运动理论等对各个运动阶段的速度进行了研究。理论计算得到滑体剧冲速度为8.9m/s,主体滑动段末速度为37.0m/s,最大速度大于96.3m/s,碎屑流沿黄洞子沟和川林沟流动,分别运移了1.6km和1.3km后停止。The Wenchuan Earthquake action triggered the Daguangbao landslide starting, then under the action of gravity acceleration, the landslide slided along the slip surface, then collided with the mountains and turned into debris flow, the entire movement process has obvious phenomena of rock mass ejection, rock mass warped, overlaped and rock extrusion phenomenon, etc. According to its characteristics of movement, it is divided into three stages, respectively the main sliding stage, the secondary sliding stage and the stage of debris flow movement. Also using the static analysis method, energy method, and the theory of debris flow movement, the speeds in all stages of movement were studied. Slippery body impact velocity of 8.9m/s, short-range sliding speed 37.0m/s, maximum speed is greater than 96.3m/s. Debris flowed along the Huangdongzi gully and Chuanlin gully, the distance is of 1.6km and 1.3km respectively.

关 键 词：汶川地震 大光包滑坡 启程剧冲 运动特征 

分 类 号：P642.22[天文地球—工程地质学]