三峡库区提升库水位下降速率条件下沟边上滑坡稳定性评价
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摘要
三峡库区对非汛期库水位下降速率(0.6m/d)的严格控制,预防了近千处涉水库岸滑坡大规模下滑入江,但控制消落期库水位下降速率在某种程度上却限制了防洪和蓄水发电效益的发挥,本文主要通过研究在非汛期时候,增加库水位下落速率是否具有可行性,使用Geo-studio中的SEEP/W、SLOPE两个模块对沟边上滑坡进行渗流分析和稳定性分析评价,以计算结果来确定库水位消落期的水位下降速率,对库区调控水位下降速率的调整有重大现实意义和科学价值。
With the tight control of the water level of the non-flood season(0.6 m/d)in the Three Gorges Reservoir area,nearly 1000 landslides are prevented from a large-scale sliding into the river.However,the control of the reservoir drawdown rate in flood falling period limits the flood control and the benefits of hydroelectric power generation to a certain extent.In this paper,the feasibility of raising the reservoir drawdown rate in non-flood season is studied,Seep/W and SLOPE modules in Geo-studio are used to analyze the seepage and evaluate the stability of landslide on the ditch side.On this basis,the reservoir drawdown rate in flood falling period can be determined,which has significant practical significance and scientific value for the adjustment of drawdown rate in the Three Gorges Reservoir area.
With the tight control of the water level of the non-flood season(0.6 m/d)in the Three Gorges Reservoir area,nearly 1000 landslides are prevented from a large-scale sliding into the river.However,the control of the reservoir drawdown rate in flood falling period limits the flood control and the benefits of hydroelectric power generation to a certain extent.In this paper,the feasibility of raising the reservoir drawdown rate in non-flood season is studied,Seep/W and SLOPE modules in Geo-studio are used to analyze the seepage and evaluate the stability of landslide on the ditch side.On this basis,the reservoir drawdown rate in flood falling period can be determined,which has significant practical significance and scientific value for the adjustment of drawdown rate in the Three Gorges Reservoir area.
引文
[1]王燕生.工程水文学[M].北京:水利电力出版社,1991:35-36.
[2] HG Poulos.Difficulties in prediction of horizontal defor-mations of foundations[J].J.of the Soil Mechanics&Foundations Division,1972,98(8).
[3]崔政权,李宁.边坡工程——理论与实践最新发展[M].北京:中国水利水电出版社,1999.
[4]潘家铮.建筑物的抗滑稳定和滑坡分析[M].北京:水利出版社,1980.
[5]长江水利委员会综合勘测局.长江三峡工程库区奉节县白衣庵滑坡治理规划阶段工程地质勘察报告[R].湖北武汉:长江水利委员会综合勘测局,1999.
[6]胡新丽,唐辉明,马淑芝,等.基于NMR的库区滑坡三维稳定性数值模拟[J].地球科学——中国地质大学学报,2006,31(2):279-284.
[7]刘才华,陈从新,冯夏庭.库水位上升诱发边坡失稳机理研究[J].岩土力学,2005,26(5):669-773.
[2] HG Poulos.Difficulties in prediction of horizontal defor-mations of foundations[J].J.of the Soil Mechanics&Foundations Division,1972,98(8).
[3]崔政权,李宁.边坡工程——理论与实践最新发展[M].北京:中国水利水电出版社,1999.
[4]潘家铮.建筑物的抗滑稳定和滑坡分析[M].北京:水利出版社,1980.
[5]长江水利委员会综合勘测局.长江三峡工程库区奉节县白衣庵滑坡治理规划阶段工程地质勘察报告[R].湖北武汉:长江水利委员会综合勘测局,1999.
[6]胡新丽,唐辉明,马淑芝,等.基于NMR的库区滑坡三维稳定性数值模拟[J].地球科学——中国地质大学学报,2006,31(2):279-284.
[7]刘才华,陈从新,冯夏庭.库水位上升诱发边坡失稳机理研究[J].岩土力学,2005,26(5):669-773.