径流–渗流条件下边坡监测预警方法研究
Research on Slope Monitoring and Early Warning Method under Runoff-Seepage Conditions

为进行降雨条件下的边坡稳定性影响研究，本文建立了滑坡的径流–渗流模型。在该模型中坡面径流采用Navier-Stokes方程描述，渗流采用Brinkman-extended Darcy方程描述。同时水体的流动又满足质量守恒方程。根据以上方程可以推导出径流和渗流中的流速分布特征。之后引入Newton内摩擦定律可以求出水流对边坡产生的拖曳力。利用该力重新修正了预应力锚索测量下滑力的公式，根据现场测量出的下滑力大小可以判断出边坡处于不稳定和裂缝发展阶段。结果表明：该公式有更好的适用性。
In order to study the influence of slope stability under rainfall conditions, a runoff-seepage model of landslides is established in this paper. In this model, the slope runoff is described by the Navier-Stokes equation, and the seepage is described by the Brinkman-extended Darcy equation. At the same time, the flow of the water body satisfies the mass conservation equation. According to the above equations, the flow velocity distribution characteristics in runoff and seepage can be deduced. Then Newton’s law of internal friction can be introduced to calculate the drag force generated by the water flow on the slope. Using this force, the formula for measuring the sliding force of the prestressed anchor cable is re-corrected. According to the sliding force measured on site, it can be judged that the slope is in the stage of instability and crack development. The results show that the formula has better applicability.