| 摘要: |
| 青田水利枢纽虽位于瓯江较为顺直的河段，但受支流、潮汐及下游河道收窄的影响，建成后枢纽通航水流条件较为复杂。基于水工整体物理模型试验，对青田水利枢纽建成后的通航水流条件进行了模拟研究。模型试验研究表明，枢纽及主要通航建筑物布置基本合理，但设计方案在运行中容易出现斜流问题，尤其是在中、小流量情况下，从而影响到船舶安全进出引航道，导致通航保证率得不到保障。试验采取调整导航墙及航线等措施，对原方案进行了优化，最终提出了航道及通航建筑物的推荐布置方案，以及最大通航流量。同时对支流入汇、潮汐影响等问题进行了研究，探讨论证了在推荐布置方案及控制流量下的通航安全性。 |
| 关键词: 水利枢纽 通航水流条件 引航道 口门区 物理模型试验 |
| DOI： |
| 分类号:U641.1 |
| 基金项目: |
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| Experimental studies on flow condition for navigation of Qingtian hydroproject located at Oujiang River |
|
JIANG Chu1,2
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1.Nanjing Hydraulic Research Institute;2.Hohai University
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| Abstract: |
| Although located at a straight reach of Oujiang River, the Qingtian hydroproject is faced with complex flow conditions for navigation, for there is a few unfavorable factors such as tributary upstream of the hydroproject, tide and narrowing waterway downstream of the hydroproject. Based on an integrated physical model test studies, the navigable flow conditions at the approach channel entrance area and the connection section of the shiplock of the original layout have been simulated and analyzed. The model test results show that the original layout of the hydroproject and the navigable structures are basically reasonable, however the cross current is easy to appear at the entrance area of the approach channel especially under circumstances of the median and low flow discharge, and it must result in unsafe navigation of vessel passing through the approach channel and also will affects the waterway throughput capacity of the hydroproject. Regulating the guide walls and waterway regulation line and optimizing the original layout schemes of the navigation structures, finally a series of the proposed schemes are presented to optimize the layouts of the waterways and navigation structures as well as the maximum design navigable discharge. In addition，some influences of the tributary and tide upon the navigable flow conditions are discussed，and navigation safety concerned to the proposed layout schemes and controlled discharge is demonstrated in the study. |
| Key words: hydroproject navigable flow conditions approach channel entrance area physical model tests |
