| 库水位骤降时坝体渗流场及坝坡稳定性分析 |
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| 引用本文： | 刘钊,柴军瑞,陈兴周,徐维生.库水位骤降时坝体渗流场及坝坡稳定性分析[J].西安理工大学学报,2011(4):466-470. |
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| 作者姓名： | 刘钊 柴军瑞 陈兴周 徐维生 |
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| 作者单位： | 西安理工大学水利水电学院;三峡大学土木水电学院;武汉大学水利水电学院; |
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| 基金项目： | 国家自然科学基金资助项目(50579092); 教育部博士后基金资助项目(20096118110007) |
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| 摘 要： | 为了研究水位骤降时影响上游坝坡稳定性的因素,模拟坝坡在水位骤降时的渗流场及稳定性变化。基于土体渗透性,材料的非线性特性及水位下降率,利用有限元法对库水位变化下的渗流场进行瞬态分析,得出的自由水面线和孔隙水压力耗散等结果应用于上游坝坡稳定性分析,坝坡稳定分析采用极限平衡法。实例分析表明:计算区域渗流场变化滞后于水位下降的时间;坝体渗透系数越小,水位骤降对其稳定性的不利影响越显著;水位下降速率越大,上游坝坡稳定性降低越快。
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| 关 键 词： | 坝坡稳定性 库水位骤降 渗流场 有限元模型 极限平衡法 |
An Analysis of the Seepage Field and the Stability of Dam Slope During Rapid Drawdown of Reservoir Water Table |
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| LIU Zhao,CHAI Junrui,CHEN Xingzhou,XU Weisheng.An Analysis of the Seepage Field and the Stability of Dam Slope During Rapid Drawdown of Reservoir Water Table[J].Journal of Xi'an University of Technology,2011(4):466-470. |
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| Authors: | LIU Zhao CHAI Junrui CHEN Xingzhou XU Weisheng |
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| Institution: | LIU Zhao1,CHAI Junrui1,2,CHEN Xingzhou1,XU Weisheng3(1.Facuty of Water Resources and Hydroelectric Engineering,Xi'an University of Technology,Xi'an 710048,China,2.College of Civil and Hydropower Engineering,China Three Gorges University,Yichang 443002,3.School of Water Resources and Hydropower,Wuhan University,Wuhan 430070,China) |
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| Abstract: | In order to study the effect of water table drawdown upon the factors of upstream dam slope stability,it is necessary to simulate the seepage field and changes in stability in the case of dam slope in water table drawdown.Based on soil permeability non-linearity of materials and rate of water table,the finite element method is used to carry out the transient analysis of the seepage field in the case of changes in reservoir water table,whereby obtaining that the results of free water surface line and dispers... |
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| Keywords: | stability of dam slope drawdown seepage field finite element model limit equilibrium method |
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