Abstract: Based on the event of bedding rock slope collapse occurred in Yuqian Expressway ,a simulation model simulating bedding rock slope before and after being reinforced was established by simulation software FLAC3D and parameters such as deformation and shear stress were collected from three monitoring points established. After the simulation results and site monitored data were compared, it was found that the side slope was in unstabilized condition before being reinforced and belonged to pulltype failure model and was of nature of sudden failure.After the antipile was applied for reinforcement the displacement contour diagram showed that the deformation along structure surface turned into arc deformation along free face of the slope, and shear stress concentration phenomenon in structure surface disappeared obviously. By comparing the monitored displacement after the reinforcement with simulated displacement it is obtained that the slope deformation is less and is in stabilized state, which proves the sound supporting effect of the antislide pile measure taken up.

Key words: highway ehgineering, antiislide pile, numerical simulation, bedding rock slope

摘要： 基于渝黔高速公路顺层岩质边坡垮塌事件，采用FLAC3D模拟软件建立了顺层岩质边坡抗滑键加固前后的模拟模型，设立3个监控点采集了顺层岩质边坡抗滑键加固前后的位移、剪应力等参数。模拟结果与现场监测数据对比发现，边坡加固前处于非稳定状态，属于牵引式破坏模式，并具有突发性。边坡采用抗滑键加固后位移等值线图显示得出，沿结构面变形转为边坡沿临空面的圆弧型变形，结构面上的剪应力集中现象明显消失。加固后的监测位移和模拟位移对比得出，边坡变形量较小，处于稳定状态，抗滑键加固措施具有较好的支挡效果。

关键词: 道路工程, 抗滑键, 数值模拟, 顺层岩质边坡