公路岩质边坡应力监测离心模型试验与应用

Centrifugal Model Test Research and Application on Stress Monitoring for Highway Rock Slope

摘要:

对公路岩质边坡的支护锚杆进行应力监测，并依此评价边坡稳定性时，存在应力变化规律与预警值难以准确确定的问题.基于离心模型试验与现场试验的方法，以广陕高速一段岩质边坡为例，对该问题进行研究.结果表明：通过模型试验可得出边坡失稳前的应力变化曲线，利用幂函数对其进行拟合，结合预警百分比的方法确定应力监测的预警范围；根据现场试验监测结果得出，采用离心模型试验的成果对边坡的稳定性进行应力监测评价具有可行性，监测过程中应兼顾周边环境的影响.

Abstract:

When the stress monitoring is used to evaluate the highway rock slope stability, the problem to determine the variable regularity of stress and warning value appears. A case study was made of a typical slope along Guang shaan Expressway to research the problems with the method of centrifugal model test and field test. The model test results show that the model test get the variable regularity of stress before failure, the variable curves are fitted with the power function, and the method of warning percentage is adopted to determine the warning value area. The field test results show that centrifugal model test results can be applied to evaluating the highway rock slope stability with stress monitoring；in the course of the stress monitoring, the researcher should notice the influence of the surrounding environment on slope.