| 含弱透水层岸坡地下水渗流特征的数值分析 |
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| 引用本文： | 汪 斌,唐辉明.含弱透水层岸坡地下水渗流特征的数值分析[J].岩土力学,2006,27(Z1):193-197. |
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| 作者姓名： | 汪 斌 唐辉明 |
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| 作者单位： | 中国地质大学（武汉）工程学院，武汉 430074 |
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| 摘 要： | 库岸滑坡同坡体内地下水渗流场的动态变化具有密切的关系。传统的饱和土渗流分析方法无法正确描述水位升降过程中岸坡内孔压场的动态变化规律。从饱和-非饱和非稳定渗流理论出发，选取典型的岩土体的渗流参数，对含有弱透水夹层的理想层状岸坡进行有限元数值分析，得到水位升降过程中岸坡内孔隙水的渗流规律。同时，也得到了坡体内基质吸力和体积含水率随库水位升降变化的历时曲线。分析表明，岩土体的饱和渗透系数、土水特征曲线以及坡体的结构特征等共同决定了水位升降过程中岸坡内孔隙水压力和浸润线的分布。模拟结果可为库岸尤其是含弱透水层边坡的稳定性评价及岸坡的排水加固提供参考依据。
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| 关 键 词： | 岸坡 非饱和非稳定渗流 有限元数值分析 |
| 收稿时间： | 2006-05-18 |
Numerical analysis of characteristic of seepage field in reservoir slope
containing relative impermeable intercalated bed |
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| WANG Bin,TANG Hui-ming.Numerical analysis of characteristic of seepage field in reservoir slope
containing relative impermeable intercalated bed[J].Rock and Soil Mechanics,2006,27(Z1):193-197. |
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| Authors: | WANG Bin TANG Hui-ming |
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| Institution: | Engineering Faculty, China University of Geosciences, Wuhan 430074, China |
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| Abstract: | There are close relationships between the dynamic changes of seepage field in slope and the failures of reservoir slopes. The traditional analysis methodology based on saturated seepage law isn’t able to describe the dynamic changes law of pore water pressure in slope while reservoir water lever fluctuating. Based on the theory of unsaturated and transient seepage, and the representative hydraulic parameters of 3 typical porous media selected, the finite element analysis of the seepage field is conducted with respect to the ideal layered slope containing relative impermeable intercalated bed. The distributions of pore water pressure and free surface in slope are obtained. Moreover, the diachronic changes of soil matric suction and volumetric water content corresponding to water lever fluctuating are obtained. The analysis reveals that the soil saturated hydraulic conductivity, characteristic curve of soil-water, and the structural feature of slope determine the pore water pressure and free surface distributions together. The modeling results can provide evidences for the evaluating of slope stability and the design of water draining and enforcement measurement for such type slope. |
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| Keywords: | reservoir slope unsaturated unsteady seepage finite element numerical analysis |
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