地震作用下顺层岩质边坡变形破坏坡面效应

地震作用下,坡面形态对岩质边坡的变形破坏过程存在一定影响。文中以汶川地区公路沿线具有典型坡面形态的顺层岩质边坡为例,采用离散元UDEC软件,模拟4种坡面形态下边坡的变形破坏过程,并监测坡体关键位置处的位移和坡体应力场。通过模拟结果,对比分析不同坡型边坡变形破坏的动力响应时间、边坡的破坏位置,以及边坡破坏的程度和模式,总结出地震作用下该类顺层岩质边坡变形破坏的坡面效应,最后通过应力场分析引起坡面效应的原因。

Topography Effects on Defomation and Failuar of Bedding Rock Slope Under Earthquake

Topography have some effects on the deformation and failuar of the bedding rock slope under earthquake.The distinct elements software UDEC are used to simulate deformation and failure of four kinds of slope which is based on the highway in Wenchuan area,and to monitor the displacement of critical position on the slope and stress field of the slope.Through simulation results,the different dynamic response time of the deformation and failure,the damage location,and the extent and mode of failure of the four types of slope can be comparatively analyzed.With the analysis,topography effects on deformation and failure of the class bedding rock slope under earthquak can be summed up.Stress analysis of slope has been carried out to find out the reason of topography effects.