地震作用下岩质边坡变形破坏效应研究  

Study on deformation failure of rock slope under earthquake action

作　　者：杨智翔 李保方[1] 康家亮[1] 程宪龙 YANG Zhi-xiang;LI Bao-fang;KANG Jia-liang;CHENG Xian-long

机构地区：[1]中水东北勘测设计研究有限责任公司,吉林长春130021

出　　处：《东北水利水电》2020年第5期43-44,54,I0002,共4页Water Resources & Hydropower of Northeast China

摘　　要：文中以汶川地震灾区公路沿线的裕丰岩边坡为例,采用有限元模拟软件对该高边坡进行模拟分析,研究地震作用下岩质边坡的变形破坏过程。分析了坡体关键位置位移和应力变化,通过分析得出:在边坡水平方向上随着坡深的增大应力会增大,在坡表达到最小。边坡垂直方向上应力会随着高程的增加而减小,在坡顶达到最小,坡脚处最大的发展规律。而且在边坡拐点、转折端会产生应力集中,这些地方是边坡失稳的起始位置。坡体内最大的水平和垂直位移发生在边坡的中上部和坡体表面。上述规律对于防治地震作用下边坡的变形破坏效应具有指导作用。Taking the Yufeng rock slope along the highway in Wenchuan earthquake disaster area as an example,the finite element simulation software is used to simulate and analyze the high slope,and the deformation and failure process of the rock slope under the action of earthquake is studied.The displacement and stress changes of the key position of the slope are analyzed,and it is concluded that the stress in the horizontal direction of the slope will increase with the increase of the slope depth,and the stress is expressed to the minimum in the slope.The stress in the vertical direction of the slope decreases with the increase of elevation,and reaches the minimum at the top of the slope and the maximum at the foot of the slope.In addition,stress concentration will occur at the inflection and turning points of the slope,which are the starting points of the slope instability.The largest horizontal and vertical displacements occur in the middle and upper part of the slope and on the surface of the slope body.The above rules have a guiding role in preventing and controlling the deformation and failure of slope under the action of earthquake.

关 键 词：地震作用 岩质边坡 有限元 坡面效应 应力位移 

分 类 号：P642[天文地球—工程地质学]