| 三峡工程大江截流水力要素变化分析 |
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| 引用本文： | 樊云,孙伯先.三峡工程大江截流水力要素变化分析[J].水文,1999(1):16-20. |
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| 作者姓名： | 樊云 孙伯先 |
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| 作者单位： | 长江三峡水文水资源勘测局 |
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| 摘 要： | 根据三峡工程大江截流期间收集到的截流河段，导流明渠、二期上下围堰口门区的水位，流速，流量，河床地形，水面流态等监测资料，分析研究了截流河段（尤其是动态的龙口）水力要素的变化规律及其相互关系。分析表明，龙口纵，横断面的流速分布受戗堤进占与平抛垫底施工和上游来水来沙的综合影响。围堰渗流量的监测对分析明渠分流比，石渣戗堤稳定研究起到了补充作用。
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| 关 键 词： | 水力要素 渗流 截流 三峡工程 大江 |
Analysis of the Variation Law of Hydraulic Factors on the MainRiver Closure Reach at TGP on the Yangtze River |
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| Fan Yun,Sun Boxian,Liu Ping,Zhang Nianzhou.Analysis of the Variation Law of Hydraulic Factors on the MainRiver Closure Reach at TGP on the Yangtze River[J].Hydrology,1999(1):16-20. |
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| Authors: | Fan Yun Sun Boxian Liu Ping Zhang Nianzhou |
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| Institution: | Sanxia Hydrological and Water Resources Survey Bureau |
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| Abstract: | Based on the data collected from the river closure reach and the open diversion channel and the closure gaps located the up and downstream cofferdams, including water level, flow velocity, river bed topography and water surface flow region, the variation law of the hydraulic factors on the reach (especially at the closure gaps) and the relationship among themselves are analyzed in this paper. The results show that the flow velocity at the longitudinal and horizontal cross-section are affected by the closure dike and bed filling constructions as well as condition of the inflow and sediment. The observing seepage inside the cofferdam would be helpful to research the diversion rate of the open channel and stabilization of the closure dike made of rock chunk. |
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| Keywords: | hydraulic factors seepage river closure the Three Gorges Project |
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