边坡开挖支护变形监测与数值模拟分析

Deformation Monitoring and Numerical Simulation Analysis of Slope Excavation and Support

为了分析边坡开挖对边坡稳定性的影响,文中利用现场监测以及模拟仿真方法,对边坡开挖过程中的结构变形特性进行分析。结果表明,边坡沉降量的时程响应曲线表现为逐渐增加的变化规律,监测过程中最大边坡沉降量为2.4 mm,未超过设计预警值;边坡开挖过程中,支护桩及冠梁的X方向位移大于Y和Z方向的位移;随着边坡工程施工进度的持续推进,支护桩和冠梁X方向的水平位移不断增加;坡顶建筑物最大沉降量位于开挖边坡的一侧,距边坡越远,坡顶建筑物沉降量越小,边坡顶部建筑物的最大沉降量为1.9 mm,远低于建筑物累计报警值10 mm。

In order to analyze the influence of slope excavation on the stability of slope,the structural deformation characteristics of slope excavation were analyzed by in-situ monitoring and simulation methods.The results show that the time-history response curve of slope settlement shows a gradual increasing change rule,and the maximum slope settlement in the monitoring process is 2.4 mm,which does not exceed the design warning value.In the process of slope excavation,the displacement of supporting pile and crown beam in X direction is larger than the displacement in Y and Z direction.With the continuous progress of slope construction,the horizontal displacement of supporting pile and crown beam in X direction increases continuously.The maximum settlement of the building at the top of the slope is located on one side of the excavation slope,and the further away from the slope,the smaller the settlement of the building at the top of the slope,the maximum settlement of the building at the top of the slope is 1.9 mm,which is far lower than the cumulative alarm value of the building 10 mm.