岩质路堑边坡施工监测及稳定性分析

Construction Monitoring and Stability Analysis of Rock Cutting Slope

以某高速公路岩质路堑边坡为例,通过施工现场监测及稳定性分析,结果显示初始设计状态下坡体深层位移和坡面位移接近滑动临界值。采取变更设计后,利用现场监测结合蒙特卡洛数值模拟的方法对该路堑边坡的加固效果进行稳定性和可靠性分析。经过加固后的边坡能较好地维持稳定,支护措施可靠。这种现场监测结合蒙特卡洛数值模拟的方法为路堑边坡的动态设计提供了依据,并能及时做出趋势性预测,为路堑岩质边坡的合理支护提供一种新的思路。

A certain rock cut slope of expressway is taken as example in the paper, and through monitoring of construction site and the stability analysis, it shows that the displacement of downhill body deep layer and slope is close to the sliding critical value under the initial design state. After design variation, by means of field monitoring and combining with Monte-Carlo numerical simulation method, the stability and reliability of the cutting slope reinforcement effect are analyzed. The slope after strengthening could remain better stability and the support measure is reliable. This method has provided a certain basis to the dynamic design of cutting slope, which can also make tendentious prediction in time and is a new thought for reasonable support of cutting slope.