填海造陆围堰工程龙口水动力数值模拟  

Hydrodynamic numerical simulation of closure gap in reclamation cofferdam project

作　　者：贾晗 王鑫珏 冯司宇 JIA Han;WANG Xinjue;FENG Siyu(CCCC First Harbor Consultants Co.,Ltd.,Tianjin 300222,China)

机构地区：[1]中交第一航务工程勘察设计院有限公司,天津300222

出　　处：《水运工程》2024年第10期19-26,共8页Port & Waterway Engineering

摘　　要：基于FVCOM模型,结合实际工程建立工程区域水动力数值模型,分析填海造陆围堰工程在不同口门宽度和不同潮位条件下龙口处的流速变化情况。结果表明:1)龙口区域潮流方向垂直于口门方向,大潮时期流速较大,小潮时期流速较小,且随着口门宽度增大,流速逐渐变小;龙口端部的聚集效应导致流速最大值出现在距离口门两端20 m左右的位置,而在口门中部较小;涨急时刻的流速明显大于落急时刻。2)工程龙口宽度在保护期宜取200~250 m,堵口期宜取100~150 m;保护期应注意龙口两侧端部附近区域的冲刷情况,堵口期应选在月小潮期间。总体而言,龙口宽度对周边流速影响明显,总结了不同工况下口门流速特点,根据数值模拟结果给出龙口宽度建议值,并通过数据分析给出龙口堵口期的合理时间。研究成果可为类似工程设计和施工提供参考。Based on the FVCOM model,a hydrodynamic numerical model is established in this paper,and the velocity changes of the enclosure gap under different gate widths and different tide levels are studied.The results show that:1)The tidal direction of the closure gap area is perpendicular to the entrance direction,the flow velocity during the high tide period is large,and the flow velocity during the low tide period is small.The aggregation effect at the end of closure gap leads to the maximum flow velocity appearing at about 20 m away from the end of closure gap on both sides,while the velocity is smaller in the middle.2)The protection period for the width of the closure gap in this project should be 200 m to 250 m,and the closure period should be 100 m to 150 m.During the protection period,attention should be paid to the erosion situation in the area near the ends of both sides of the closure gap,and the closure period should be selected during the low tide period.In summary,the width of the closure gap has a significant effect on the surrounding flow velocity.In this paper,the characteristics of the flow velocity of the closure gap under different working conditions are summarized,the recommended value for the width of the closure gap is given according to the numerical simulation results,and a reasonable time for the closure period is provided through data analysis.The research results can provide reference for similar engineering design and construction.

关 键 词：龙口 水动力 FVCOM数值模拟 

分 类 号：U655.541[交通运输工程—港口、海岸及近海工程]