陆浑水库坝基渗透稳定性评价与预测
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摘要
在厘定水文地质模型的基础上 ,运用数理统计和数值模拟成功地解决了困扰水库正常运行的坝基渗流问题 ,获得了关于坝基渗透稳定状况及其变化趋势的认识。研究表明 ,目前大坝的运行状况正常 ,水库在缓慢蓄水过程中 ,截水槽的薄弱部位可以得到渗透加固 ,截水槽中的填土与岩石结合面的抗渗比降可达 45以上 ;上游铺盖与截水槽结合下游排水的防渗体系有效地控制了坝基渗流 ,这为水库投入正常高水位 (31 9 5m ,32 7 5m ,331 8m)运行提供了理论依据。
On the basis of the prescribed hydrogeological model, using the method of mathematical statistics and numerical simulation, the paper successfully solves the dam foundation seepage problem perplexing the normal operation of the reservoir. It obtains the knowledge of the stability condition of the dam foundation seepage and its changing tendency. This study manifests that the present operating condition of the dam is in normal state. During the slow water storing process of the reservoir, the weak portion of the cut-off trench can be solidified due to seepage. The piping resistance of the junction of the fill and rock in the trench rises up to 45. The upstream blanket and the combination of the cut-off trench with the downstream drainage effectively controls the dam foundation seepage system. In this way, it presents the theoretical basis for the reservoir to be set at the normal high water level(319.5m, 327.5m, 331.8m) operation.
On the basis of the prescribed hydrogeological model, using the method of mathematical statistics and numerical simulation, the paper successfully solves the dam foundation seepage problem perplexing the normal operation of the reservoir. It obtains the knowledge of the stability condition of the dam foundation seepage and its changing tendency. This study manifests that the present operating condition of the dam is in normal state. During the slow water storing process of the reservoir, the weak portion of the cut-off trench can be solidified due to seepage. The piping resistance of the junction of the fill and rock in the trench rises up to 45. The upstream blanket and the combination of the cut-off trench with the downstream drainage effectively controls the dam foundation seepage system. In this way, it presents the theoretical basis for the reservoir to be set at the normal high water level(319.5m, 327.5m, 331.8m) operation.
引文
1 宋然 陆浑大坝坝基及东西坝头渗透稳定性分析 人民黄河 ,1 990 ,(5) :1 7～ 1 9
2 吴喜定 .陆浑水库简介 人民黄河 ,1 990 ,(5) :1 0～ 1 1
3 刘杰 陆浑坝基运行现状安全评价 人民黄河 ,1 990 ,(5) :2 1～ 2 4
4 刘杰 ,缪良绢 缓慢蓄水对大坝防渗体渗透加固作用的试验研究 人民黄河 ,1 990 ,(5) :2 9～ 33
5 朱建华 ,范振国 ,宋然 .陆浑水库天然淤积铺盖防渗性能分析 人民黄河 ,1 990 ,(5) :33～ 35
6 缪良绢 ,刘杰 .陆浑大坝截水槽接触渗透试验研究 .人民黄河 ,1 990 ,(5) :36～ 39
7 毛昶熙主编 .渗流计算分析与控制 .北京 :水利电力出版社 ,1 990 32 1～ 32 8
8 陈葆仁 ,洪再吉 .地下水动态及其预测 .北京 :科学出版社 ,1 988 2 1 0～ 2 2 8
9 《工程地质手册》编写委员会 .工程地质手册 .北京 :中国建筑工业出版社 ,1 992 92 3～ 930
1 0 杨裕云 .堤防工程地质病害与防治决策应注意的问题 .见 :山的呼唤 (张咸恭教授八十华诞暨从事地质工作六十年庆贺文集 ) .北京 :地震出版社 ,1 999 2 36～ 2 4 0
2 吴喜定 .陆浑水库简介 人民黄河 ,1 990 ,(5) :1 0～ 1 1
3 刘杰 陆浑坝基运行现状安全评价 人民黄河 ,1 990 ,(5) :2 1～ 2 4
4 刘杰 ,缪良绢 缓慢蓄水对大坝防渗体渗透加固作用的试验研究 人民黄河 ,1 990 ,(5) :2 9～ 33
5 朱建华 ,范振国 ,宋然 .陆浑水库天然淤积铺盖防渗性能分析 人民黄河 ,1 990 ,(5) :33～ 35
6 缪良绢 ,刘杰 .陆浑大坝截水槽接触渗透试验研究 .人民黄河 ,1 990 ,(5) :36～ 39
7 毛昶熙主编 .渗流计算分析与控制 .北京 :水利电力出版社 ,1 990 32 1～ 32 8
8 陈葆仁 ,洪再吉 .地下水动态及其预测 .北京 :科学出版社 ,1 988 2 1 0～ 2 2 8
9 《工程地质手册》编写委员会 .工程地质手册 .北京 :中国建筑工业出版社 ,1 992 92 3～ 930
1 0 杨裕云 .堤防工程地质病害与防治决策应注意的问题 .见 :山的呼唤 (张咸恭教授八十华诞暨从事地质工作六十年庆贺文集 ) .北京 :地震出版社 ,1 999 2 36～ 2 4 0
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