| 周千凯,李 帆,周林辉,蒋孜伟.沅水桃源枢纽二线船闸整体布置试验研究[J].水运工程,2025,(1):145-153 |
| 沅水桃源枢纽二线船闸整体布置试验研究 |
| Test on overall layout of second ship lock at Taoyuan Hub in Yuan River |
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| DOI： |
| 中文关键词: 引航道 口门区 模型试验 二线船闸 通航水流条件 |
| 英文关键词:approach channel entrance area model test second ship lock navigable flow condition |
| 基金项目: |
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| 中文摘要: |
| 针对沅水下游存在高等级航道瓶颈，桃源枢纽一线船闸通过能力不足的问题，拟在桃源枢纽扩建二线船闸。建立1:100整体定床物理模型，对船闸左、右岸的设计方案进行比选和优化，并对引航道及口门区的通航水流条件采取一系列改善措施。结果表明：左岸新建船闸方案通航流量基本能达到10 a一遇洪水流量，但需要拆除重建3孔泄洪闸，对枢纽主体结构、左汊行洪能力、河床稳定影响大，还需要拆除一线船闸左侧导航堤和导流堤，导致大幅降低一线船闸通航保证率；通过对右岸船闸方案采用减小上游开挖深度、在上游连接段布置潜坝、优化隔水墙长度、扩展航槽宽度的方案，可大幅改善引航道及口门区的通航水流条件，满足通航要求。 |
| 英文摘要: |
| There is the bottleneck of the high-grade waterway downstream of the Yuan River,and the problem of insufficient capacity of the first ship lock at Taoyuan Hub.It is necessary to build the second ship lock at Taoyuan Hub.We compare and optimize the design schemes of the left and right banks of the ship lock by building a 1:100 integrated fixed bed physical model,and propose a series of improvement measures for navigation flow conditions of the approach channel and the entrance area.The results show that the navigation flow of the new ship lock scheme on the left bank can basically reach a flood flow rate of once every ten years,but it is necessary to rebuild three floodgates,which has a significant impact on the main structure of the hub,the flood discharge capacity of the left branch,and the stability of the riverbed.In addition,dismantling the navigation and diversion embankments on the left side of the first ship lock will lead to a significant reduction in the navigation guarantee rate of the first ship lock.The implementation of a plan to reduce the upstream excavation depth,arrange a submerged dam in the upstream connection section,optimize the length of the diaphragm wall,and expand the width of the navigation channel for the right bank ship lock can significantly improve the navigation flow conditions of the approach channel and entrance area,making it meet navigation requirements. |
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