基于监测与数值模拟的岩质边坡稳定性分析

Rock slope stability analysis based on deformation monitoring and numerical simulation

以某工程K32＋565～K32＋760标段的重点岩质高边坡为例，对边坡表面变形及深部变形等位移监测资料进行了分析，并数值模拟了边坡5级开挖的施工过程．结果表明：降雨和开挖卸荷对边坡变形有较大影响，雨季后边坡表面和深部的位移观测数据均不同程度地出现异常；边坡浅层的变形比较明显，其中1级坡和2级坡位移量较大，应采取加固手段进行控制；边坡深部没有发生大的异常变形．根据监测数据判断出的滑动面位置和形状与强度折减法得出的滑动面位置和形状基本一致，说明将安全监测与数值计算相结合，可以更好地指导施工和了解边坡的安全动态．

With the section K32 ＋ 565-K32 ＋ 760 of a rock slope taken as an example, the monitoring data of surface and deep-layer deformation of the slope were analyzed, and the construction process of the slope excavation in 5-stages was simulated. The result showed that precipitation and excavation were of great influences on the slope stability, and abnormal data were obtained in surface and deep-layer displacement monitoring of the slope in rainy season. According to the analysis result, the shallow-layer deformation of the slope is obvious, with the maximum displacement occurring in the slope of grade-I and grade-II, therefore, some reinforcement measures should be taken; however, the deep layer deformation of the slope is relatively small. Moreover, the location and form of the sliding surface obtained from monitoring data are in good agreement with those obtained by the s the combination of safety monitoring with numerical simulation investigation of the safety of slopes. trength reduction method, and it is demonstrated that is beneficial for supervision of construction and