依据充气排水原理和非饱和渗流理论,提出在后缘水入渗路径上设置充气孔进行充气排水,从而形成非饱和截水帷幕的滑坡治理方法。气排水过程属于多项渗流问题,是一个非常复杂的气–水两相流过程,以渗流力学为基础,建立气–水两相渗流模型描述流体在地层中真实的物理过程。通过有限元方法对充气截排水方法的可行性和影响截排水效果的影响因素进行模拟分析。分析得出如下结论:气体主要沿着水位降低的方向扩散,后缘来水的渗流方向大部分发生改变而流向坡面,充气排水形成的非饱和区截排水效果良好;气排水存在启动压差,渗透系数越小,启动压差越大;充气气压越大,截排水效果越好;渗透系数和孔隙率对截排水效果无影响。 According to the principle of aeration and drainage and unsaturated seepage theory, a method of landslide control is proposed by setting aeration holes on the water infiltration path at the rear edge for aeration and drainage. The gas drainage process belongs to a number of seepage problems. It is a very complicated gas-water two-phase flow process. Based on seepage mechanics, a gas-water two-phase seepage model is established to describe the real physical process of fluid in the formation. The feasibility of the method of aerated cut-off and drainage and the factors influencing the water-drainage effect were simulated by finite element method. The main conclusions are drawn as follows: The gas diffuses mainly in the direction of decreasing water level, and the seepage direction of the incoming water from the trailing edge mostly changes and flows to the slope. The non-saturated zone formed by aerated drainage is good for drainage and drainage. , The smaller the permeability coefficient is, the larger the pressure difference is. The larger the inflation pressure is, the better the effect of water cut-off and drainage is. The permeability coefficient and porosity have no effect on the water cut and drainage effect.