近岸滩涂区海堤口门尺寸优化数值分析  

Numerical analysis for optimization of seawall entrance size in nearshore tidal flat areas

作　　者：陆伟 刘姝娜[2] 房新玉 朱宇新[3] LU Wei;LIU Shuna;FANG Xinyu;ZHU Yuxin(Tianjin Water Transport Engineering Survey and Design Institute Co.,Ltd.,Tianjin 300456,China;Guangzhou Salvage Bureau,Ministry of Transport,Guangzhou 510655,China;Tianjin Research Institute for Water Transport Engineering,Ministry of Transport,Tianjin 300456,China)

机构地区：[1]天津水运工程勘察设计院有限公司,天津300456 [2]交通运输部广州打捞局,广东广州510655 [3]交通运输部天津水运工程科学研究院,天津300456

出　　处：《水运工程》2023年第8期43-50,62,共9页Port & Waterway Engineering

摘　　要：针对近岸滩涂区建设海堤过程中需进行海堤口门设置,建立近岸滩涂区数学模型作为研究手段,应用水动力和水质模型模拟海堤所在滩涂区的水动力条件和海堤所围水体与外海交换情况,研究海堤口门尺寸大小与口门处水流流速、所围水体的交换时间、交换率的关系。计算结果表明:近岸滩涂区受地形高程的影响,在落潮阶段大部分滩涂区均有露滩现象,在该区域建设海堤时,当口门设计尺寸超过100 m时,可保证通过口门处的水流最大流速控制在1 m/s以下,也可实现在1个潮周期海堤内部的水体全部下泄至外海,与外海的水体实现100%交换率,为后期海堤口门设置提供决策依据。Regarding the problem of setting seawall entrance during the construction of the seawall in nearshore tidal flat areas,a mathematical model of the nearshore tidal flat area is built as a research tool to simulate the hydrodynamic conditions of the tidal flat area where the seawall is located and the exchange between the water enclosed by the seawall and the open sea.We study the relationship of the size of the seawall entrance with the flow velocity at the entrance,the exchange time,and the exchange rate of water enclosed by the seawall.The calculation results show that the nearshore tidal flat areas are affected by the terrain elevation,and most tidal flat areas are exposed during the ebb phase.For the seawall built in this area,when the size of the entrance is more than 100 m,it can not only ensure that the maximum flow velocity at the entrance can be controlled below 1 m/s but also realize that all water inside the seawall can be discharged to the open sea in a tide cycle,achieving an exchange rate of 100%with the open sea water,which provides a decision-making basis for the later setting of seawall entrance.

关 键 词：近岸滩涂 数值模拟 透水海堤 水体交换 

分 类 号：U651[交通运输工程—港口、海岸及近海工程]