基于离散元的滑塌式危岩体失稳机理研究  

Instability Mechanism of Sliding Dangerous Rock Mass Based on Discrete Element

作　　者：王禄洲 薛新华[1] 郭志元[1] 黄浩[1] 张芮椋 WANG Luzhou;XUE Xinhua;GUO Zhiyuan;HUANG Hao;ZHANG Ruiliang(School of Water Resources and Hydropower,Sichuan University,Chengdu,Sichuan 610065,China)

机构地区：[1]四川大学水利水电学院,四川成都610065

出　　处：《水利与建筑工程学报》2020年第5期132-136,共5页Journal of Water Resources and Architectural Engineering

摘　　要：为了研究滑塌式危岩体在地震动作用下的响应规律和失稳机理。以大渡河双江口水电站27#危岩体为例,利用离散单元法对滑塌式危岩体在地震作用下的动力破坏情况进行数值模拟。结果表明:滑塌式危岩体在地震荷载作用下发生破坏后,失稳块体的运动主要分为三个阶段:启动准备阶段、加速下滑阶段、滞留稳定阶段。结论揭示了地震作用下块体以滑动为主,滚动为辅的失稳规律,为危岩防灾减灾提供参考和借鉴。In order to analyze the response law and instability mechanism of the collapsed dangerous rock mass under the action of ground motion.By taking the 27#dangerous rock mass of the Shuangjiangkou Hydropower Station on the Dadu River as an example,the discrete element method was used to numerically simulate the dynamic damage of the collapsed dangerous rock mass under the action of earthquake.The results are as follows.After the collapse of the dangerous rock mass under earthquake load,the motion of the unstable block is mainly divided into three phases:start-up preparation phase,accelerated glide phase,and stabilization phase.The conclusion reveals the instability of the block under the action of earthquakes,with sliding as the main component and rolling as the auxiliary component,which can provide reference for the disaster prevention and mitigation of dangerous rocks.

关 键 词：滑塌式危岩体 离散单元法 数值模拟 地震荷载 

分 类 号：U41[交通运输工程—道路与铁道工程]