长江南京以下深水航道和畅洲水道整治效果分析  

Analysis of Regulating Effect of Hechangzhou Waterway in 12.5m Deepwater Channel at Lower Reaches of the Yangtze River from Nanjing

作　　者：沈彦军 王国波 陈亮 Shen Yanjun;Wang Guobo;Chen Liang(Zhenjiang Waterway Department of the Yangtze River,Zhenjiang Jiangsu 212002,China)

机构地区：[1]长江镇江航道处,江苏镇江212002

出　　处：《港工技术》2021年第4期6-9,共4页Port Engineering Technology

摘　　要：为达成长江口深水航道上延至南京的目标,长江南京以下12.5 m深水航道二期工程和畅洲水道实施航道整治工程,在左汊采用潜堤的结构形式,减小左汊分流比,改善右汊航道水深条件。本文根据和畅洲水道航道整治工程实施后的实测数据,与设计阶段数物模预测结果进行对比分析,综合分析工程前后在滩槽变化、河床容积、流场变化、分流分沙变化等方面的实现情况。结果表明:工程实施以后,左汊潜堤上游侧主要呈淤积状态,潜堤下游侧呈冲刷状态。右汊分流比大幅提高,河槽大面积刷深,航道维护量非常小。工程达到了预期的航道整治目标,工程治理方案合理,航道整治效果显著,可为长江中下游潮汐分汊河段航道整治提供参考。In order to extend the deepwater channel of the Yangtze River Estuary to Nanjing, Hechangzhou waterway regulating works were carried out in phase Ⅱ project of 12.5 m deepwater channel at lower reaches of the Yangtze River from Nanjing. Submerged dike structure was adopted in the construction of left branch to reduce the diversion ratio of left branch and improve the water depth condition of right branch. The measured data gathered since the execution of Hechangzhou waterway regulating works were compared with the results produced from mathematic and physical models in the design stage in order to fully analyze the change of shoals, the volume of river bed, the change of flow field, the change of diversion and sediment distribution before and after the construction. The results showed that the upper and lower reaches of the submerged dike of left branch were silted and scoured respectively. The diversion ratio of right branch was increased up to a high extent, the waterway was deepened within the range of large area, and the amount of work for channel maintenance became much less. The above regulation works achieves the expected goal, the reasonable regulating plan and significant channel regulation effect may serve as a reference for the regulating works of tidal branches at middle and lower reaches of the Yangtze River.

关 键 词：长江南京以下12.5 m深水航道 和畅洲水道 航道整治 整治工程 效果分析 

分 类 号：U61[交通运输工程—船舶及航道工程]