Influence of Water Level Drawdown on Landslide Movement in Reservoir
Influence of Water Level Drawdown on Landslide Movement in Reservoir
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DOI：
10.1007/978-3-319-04996-0_106
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Hufeng Yang;Fawu Wang
中科院分区：
文献类型：
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作者：
Hufeng Yang;Fawu Wang
水位变化是水库滑坡的主要触发因素之一。三峡库区树坪滑坡现场监测资料表明，库水位下降时滑坡滑动变形加速。为研究库水位下降对滑坡运动的影响，通过边坡模型试验，模拟库水位下降对滑坡运动的影响。研究了不同渗透系数边坡在水位变化条件下，随着孔隙水压力的产生和消散而沿着移动的规律。试验结果表明，边坡材料的渗透性控制着水位下降时边坡中孔隙水压力的消散。但是，如果渗透率足够高，渗透率的变化对孔隙水压力消散时间的影响将不明显。在水库低渗透土滑坡的治理过程中，应重视地下水的排泄，以迅速降低库水位下降后的孔隙水压力。
Water level variation is one of the main triggering factors of landslides in reservoirs. In the Three Gorges Reservoir, China, the field monitoring data of the Shuping landslide shows that the sliding deformation accelerates during water level drawdown. In order to study the influence of water level drawdown on landslide movements in the reservoir, series of slope model tests were conducted to simulate the response of water level drawdown on the slope. The movement of slopes with different soil permeability is presented along with the generation and dissipation of pore water pressure in the slopes under water level variation. Experimental results show that the permeability of slope material controls the dissipation of pore water pressure in the slope under water level drawdown. However, if the permeability is high enough, the effect of the permeability change on the dissipation time of pore water pressure will not be obvious. During the mitigation and prevention of landslide with low permeability soil in reservoir, more attention should be focused on the drainage of ground water to quickly reduce the pore water pressure after water level drawdown in reservoir.