| 付旭辉,杜洪源,龚慧玲,何京霖,张 波.白河包营枢纽船闸下游口门区优化方案研究*[J].水运工程,2024,(10):90-97 |
| 白河包营枢纽船闸下游口门区优化方案研究* |
| Optimization scheme for downstream entrance area of Baoying Hub ship lock in White River |
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| DOI： |
| 中文关键词: 口门区 下游引航道 通航水流条件 方案优化 |
| 英文关键词:entrance area downstream approach channel navigable flow condition scheme optimization |
| 基金项目:重庆市技术创新与应用示范专项重点研发项目( cstc2018jszx-zdyfxmX0021-05) ;
重庆市教育委员会 “成渝地区双城经济圈建设”科技创新项目( KJCXZD2020030) ;
贵州省交通运输厅科技项目( GZJT2021-221-012)；
长江航道局科研项目（CJHDJHT20211200041） |
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| 中文摘要: |
| 包营枢纽下游引航道口门区流场复杂、混乱。为保障内河船舶通航安全，对枢纽下游河道整体水域进行数值模拟研究，分别对比分析扩宽河道、扩宽河道+口门区设置导流墩、扩宽河道+布置隔流堤3种优化方案前后的枢纽通航条件。结果表明，原始方案中，当流量最大时横流、纵流最大流速分别为0.95、3.60 m/s，超出0.65、1.60 m/s的安全限值，且延长隔流堤导致末尾处下泄主流出现较大回流、横流的不良流态。最终选定在扩宽河道的基础上设置导流墩为最佳优化方案，与其他方案相比，此方案可加强主流与口门区局部流场的动量交换，减小速度梯度以及主流与口门区夹角，显著改善口门区水流条件，保障船舶通航安全。 |
| 英文摘要: |
| The flow field in the entrance area of the downstream approach channel of Baoying Hub is complicated and chaotic.In order to ensure the safety of the inland ship’s navigation,we conduct a numerical simulation study on the overall waters of the downstream riverway of Baoying Hub,and compare and analyze the navigable flow conditions before and after the implementation of three optimization schemes,such as widening riverway,widening riverway+arranging diversion piers in the entrance area,and widening riverway+arranging partition dikes.The results show that in the original plan,the maximum rates of transverse and longitudinal flow are 0.95 m/s and 3.60 m/s when the flow is maximum,which exceed the safety limits of 0.65m /s and 1.60 m/s.The extension of the partition dikes causes the bad flow pattern of large backflow and cross flow at the end.Arranging diversion piers on the basis of the widening river is selected as the best optimization scheme.Compared with other schemes,this scheme can strengthen the momentum exchange of mainstream and local flow fields in the entrance area,reduce the rate gradient and the angle between the main stream and the entrance area,and significantly improve the flow conditions of the entrance area to ensure the safety of ship navigation. |
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