三峡库区奉节县新城植物油厂滑坡地下水动力场分析

Hydrodynamics Analyses of Vegetable Oil Factory Landslide in New Fengjie County in Three Gorges Reservoir Area

三峡库区奉节县新城植物油厂滑坡大多处于三峡水库水位以下,库水位变化对边坡(滑坡)稳定性影响较大,尤其在库水位骤降时,坡体内将产生较大的动水压力,不利于边坡稳定。采用数值模拟方法模拟了边坡地下水渗流场。结果表明,库水位由175 m骤降至145 m时,植物油厂滑坡所受动水压力远高于正常蓄水位时所受的动水压力;采取降低地下水位的工程措施后,有效降低了正常蓄水位下边坡内的动水压力,为科学治理滑坡提供借鉴。

The vegetable oil factory landslide in new Fengjie County is located in the Three Gorges Reservoir area. And most landslide body is below water level of the reservoir. The stability of the slope is influenced by the changes in water level. Especially when the water falls suddenly,great hydrodynamics pressure will be produced in the landslide body. Based on the numerical simulation method,this paper simulates the groundwater seepage field of the slope. According to the re- sults, the hydrodynamics pressure on the landslide is far higher than that of normal water level, when the water level is suddenly lowed from 175 to 145m. After the engineering measures to lower the groundwater level have been taken, the hydrodynamics pressure under the normal water level is reduced effectively.