地震荷载作用下双面边坡稳定性数值模拟研究  

Research on Numerical Simulation of Double-sided Slope Stability under Earthquake Condition

作　　者：刘思杰[1] 刘明维[1] 

机构地区：[1]重庆交通大学河海学院,重庆400074

出　　处：《水力发电》2017年第6期28-31,38,共5页Water Power

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)

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 only 1.08, which is far less than the value of 1.32 before earthquake; and （e） however, the sliding surfaces are same after and before earthquake.

关 键 词：地震荷载 双面边坡 稳定分析 PLAXIS.2D 

分 类 号：TU457[建筑科学—岩土工程]