库水位升降作用对动水压力型滑坡的影响——以三峡库区白家包滑坡为例

发布时间：2018-06-07 04:55

本文选题：动水压力型滑坡 + 渗透系数　；参考：《科学技术与工程》2017年18期

【摘要】：三峡库区蓄水以来,在库水位的周期升降以及降雨条件的影响下,库岸滑坡的岩土体物理性质发生改变,大量涉水滑坡发生复活变形。为了分析三峡库区的水位周期性升降对涉水滑坡稳定性的影响,以库区较为发育的动水压力型滑坡为研究对象,分析库区水位升降对滑坡稳定性和滑坡地下水位线的影响。选取三峡库区秭归县白家包滑坡为例,以Geo-Studio软件的SEEP/W以及SLOPE/W模块为辅助工具,分别分析不同滑坡体渗透系数、不同库水位升降速率下的滑坡稳定性,以及地下水位线的变化规律。结果表明:对于库区动水压力型滑坡,当库水位上升时,滑坡体的稳定性整体而言是增加的,滑坡体地下水位线呈现向下弯曲的趋势;库水位下降时,滑坡体的稳定性整体是降低的,滑坡体地下水位线呈现向上弯曲的趋势。在不同的滑坡体渗透系数下,滑坡体的渗透系数越小,库水位升降时对滑坡稳定性影响也越大。
[Abstract]:Since the storage of water in the three Gorges Reservoir area, under the influence of the periodic rise and fall of the reservoir water level and the rainfall conditions, the physical properties of the rock and soil mass of the landslide in the reservoir bank have been changed, and a large number of landslides in the wading area have been revived. In order to analyze the influence of the periodic fluctuation of water level in the three Gorges Reservoir area on the stability of wading landslide, the effect of the fluctuation of water level in the reservoir area on the stability of landslide and the underground water level of landslide is analyzed with the dynamic pressure landslide in the reservoir area as the research object. Taking Baijiapao landslide in Zigui County, three Gorges Reservoir area, as an example, taking the SEEP/W and SLOPE/W modules of Geo-Studio software as auxiliary tools, the landslide stability under different landslide permeability coefficient and different water level rising and falling rate is analyzed respectively. And the change law of underground water level. The results show that for the hydrodynamic pressure landslide in the reservoir area, when the reservoir water level rises, the stability of the landslide body as a whole is increased, and the underground water level of the landslide tends to bend downward, while the water level of the reservoir decreases. The stability of the landslide is reduced as a whole, and the underground water level of the landslide tends to bend upward. The smaller the permeability coefficient of the landslide is, the greater the influence on the landslide stability is when the reservoir water level rises or falls.
【作者单位】：成都理工大学地质灾害防治与地质环境保护国家重点实验室;
【分类号】：P642.22

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