摘要
内河出海口口门处通航和水流条件复杂。以大芦线东延伸航道整治工程为例,采用二维潮流数学模型对工程方案进行数值模拟研究,分析复杂水域不同导流堤的作用及其对航道条件的影响。结果表明:口外平行导流堤方案具有一定的削弱外航道横流的作用,但该方案存在堤头等局部横流及增加回淤量等问题,不利于船舶航行和航道维护,不能有效改善口门外通航条件,因此本工程条件下不推荐此方案;南、北侧现状促淤堤位置布设直弧形导流堤方案,可有效减弱口门及口外航道部分水域的横流、优化环流流态、改善口门通航条件,推荐采用该方案开展后续研究。综合考虑方案效果及经济性,推荐在大芦线口门南、北现状促淤堤内侧布设南侧长930 m、北侧长1500 m的直弧形导流堤。
The navigation and water flow conditions at the entrance of the inland river estuary are complex.Taking the east extension channel regulation project of the Dalu Line as an example,we use the two-dimensional tidal current sediment mathematical model to simulate the layout scheme,and analyze the influence of different diversion dikes on navigation conditions in complex waters.The results show that the scheme of parallel diversion dike outside the entrance has a certain effect on weakening the cross flow of the outer channel,but the scheme has the problems of increasing the cross flow at the head of the dike,increasing the local cross flow and increasing the amount of siltation,which is not conducive to ship navigation and channel maintenance,and cannot completely improve the navigation conditions outside the entrance,so this scheme is not recommended for the project conditions.The straight curved diversion dikes are arranged at the current siltation-promoting dikes on the south and north sides,which can weaken the cross-flow of some waters at the entrance and the outer channel,optimize circulation flow patterns,and improve the navigation conditions at the entrance,so this scheme is recommended for further study.Considering the effect of the comprehensive scheme and economic factors,it is recommended to set up a straight curved diversion dike with a length of 930 m on the south side and a length of 1500 m on the north side of the current siltation dike in the south and north of the Dalu Line entrance.
作者
李波
顾峰峰
付桂
翁扬
LI Bo;GU Fengfeng;FU Gui;WENG Yang(Yangtze Estuary Waterway Administration Bureau,MOT,Shanghai 200003,China;Shanghai Estuary and Coastal Science Research Center,Shanghai 201201,China;Shanghai Hanghong Engineering Management Co.,Ltd.,Shanghai 200137,China)
出处
《水运工程》
2024年第11期79-85,共7页
Port & Waterway Engineering
基金
上海市科学技术委员会科研计划项目(21DZ1201700、21DZ1201002)。
关键词
内河出海口航道
大芦线东延伸航道
整治工程
平行导流堤
直弧形导流堤
数值模拟
通航条件
inland river estuary waterway
east extension channel of Dalu Line
regulation project
parallel diversion dike
straight curved diversion dike
numerical simulation
navigation condition
