地震高位滑坡形成条件及抛射运动程式研究  

STUDY OF FORMATION CONDITIONS AND TOSS MOTION PROGRAM OF HIGH LANDSLIDES INDUCED BY EARTHQUAKE

作　　者：王运生[1] 徐鸿彪[1] 罗永红[1] 吴俊峰[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：《岩石力学与工程学报》2009年第11期2360-2368,共9页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展计划(973)项目(2008CB425801);中国地调局项目:"汶川地震地质灾害调查评价"--川西深切河谷斜坡地震动评价技术研究(1212010914010)

摘　　要：根据典型地震高位滑坡坡体结构特点及地震斜坡响应,对其形成机制进行探讨,认为P波的垂直上抛作用及S波的水平剪切作用,将强卸荷带下限以外裂隙切割的岩体结构面贯通并使其丧失与下部岩体的结合力,后至的面波经地形放大后,巨大的加速度(通常>2 g)将斜坡上部表层高位岩体近水平或斜向上抛出,形成地震高位滑坡。Based on structural features and earthquake-induced slope response, the genetic mechanism of the typical earthquake high slope landslides can be concluded as follows： the structural plane of rock mass cut by cranny is apart from the lower limit of strong unloading zones, and is made rtm through to lose the bonding force with underneath rock mess by upper throwing force of P-wave and horizontal shear force of S-wave; the surface wave with huge acceleration（more than 2 g normally） arrives last and is enlarged by terrain, by which the upper surface layer of the slope is thrown out approximately horizontally or decumbent; and the earthquake-induced high slope landslide is formed.

关 键 词：边坡工程 汶川地震 高位滑坡 形成机制 运动程式 

分 类 号：P642.22[天文地球—工程地质学]