里坞矿区降雨型滑坡勘察与评价

Investigation and Assessment of Rainfall-induced Landslide in the Mining Area of Liwu

矿区受开挖和降雨的影响,极易形成滑坡,本文通过里坞水泥矿区的滑坡勘察实例,在查明滑体现状同时采用极限平衡法反求其岩土参数,利用有限元方法进行稳定性验证。考虑到地下水位、渗流路径和岩土参数的复杂性,采用非饱和土力学理论,根据实测水位和泉眼出露情况,进行降雨条件下滑坡渗流场及应变场模拟,较为准确地模拟出滑坡的形成过程。

The mining area is vulnerable to forming landslides due to the effects of excavation and precipitation. In this paper, through the landslide investigation in the Liwu cement mining area, the current status of the landslide is ascertained, and the limit equilibrium method is applied to inversely determine its geotechnical parameters, and the stability is verified using the finite element method. Making allowance for the complexity of the groundwater table, seepage path and geotechnical parameters, the unsaturated soil mechanics theory was applied to simulate the seepage field and strain field of the descending slope in the rainfall condition based on the measured water level and the exposure situations of the spring opening, which was more accurately simulated the formation process of landslide.