地震荷载作用下双面边坡稳定性数值模拟研究

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英文篇名：Research on Numerical Simulation of Double-sided Slope Stability under Earthquake Condition 作者：刘思杰 ; 刘明维 英文作者：LIU Sijie;LIU Mingwei;School of River & Ocean Engineering, Chongqing Jiaotong University; 关键词：地震荷载 ; 双面边坡 ; 稳定分析 ; PLAXIS-2D 英文关键词：earthquake load;;double-sided slope;;stability analysis;;PLAXIS-2D 中文刊名：SLFD 英文刊名：Water Power 机构：重庆交通大学河海学院; 出版日期：2017-06-12 出版单位：水力发电 年：2017 期：v.43;No.518 基金：国家自然科学基金项目(51479014);; 四川省交通运输科技项目(2015B1-3) 语种：中文; 页：SLFD201706009 页数：5 CN：06 ISSN：11-1845/TV 分类号：32-35+42

摘要

采用二维有限元程序PLAXIS-2D,系统地研究了地震条件下双面边坡的地震响应规律,计算了地震前后边坡的滑裂面和安全系数。结果表明,地震后,双面边坡仍处于稳定状态;较陡侧(左侧)边坡有明显的滑动趋势,并带动较缓侧(右侧)边坡上部岩体共同剪切滑动;左侧边坡塑性点分布范围明显扩大,并贯穿到右侧较缓边坡4/5高处,造成右侧边坡局部岩体拉断破坏;地震后边坡安全系数仅有1.08,稳定性较差,远小于地震前的1.32;地震前后边坡滑裂面基本相同。
        The two-dimensional finite element program PLAXIS-2D is used to systematically study the seismic response law of double-sided slope under earthquake conditions and the slip surface and safety coefficient of slope before and after earthquake are calculated. The results show that:( a) the double-sided slope is still in steady state after earthquake;( b) the steep side slope( left slope) has obvious sliding trend and drives the upper rock mass of slowly side slope( right slope) to appear shear sliding;( c) the plastic range of steep side slope expands significantly and run through to right slope at the position of 4/5 slope height, which causing the tensile failure of local rock in right slope;( d) after earthquake, the safety coefficient of slope is only1. 08, which is far less than the value of 1. 32 before earthquake; and( e) however, the sliding surfaces are same after and before earthquake.

引文

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