淤泥质浅滩航道疏浚过程中水流输运能力变化分析  

Changes of water transport capacity during dredging in silty shoal waterway

作　　者：孟江山 MENG Jiangshan(China Communications Guangzhou Navigation Bureau Co.,Ltd.,Guangzhou 510289,China)

机构地区：[1]中交广州航道局有限公司,广东广州510289

出　　处：《水运工程》2024年第10期69-74,143,共7页Port & Waterway Engineering

摘　　要：射阳港位于苏北淤泥质浅滩,水深条件相对较差,航道回淤强度大。构建了二维潮流数学模型,研究航道自现状疏浚至设计底高程的水流输运能力的过程变化。结果表明,随着航道的浚深,航道内水流流速整体呈减小趋势,航道流速减少程度与航道浚深幅度呈正比,涨急流速最大减少43.4%~61.7%,落急流速最大减少39.8%~58.5%。航道浚深至6.5 m时,航道落潮水流输运能力减小幅度达40%~80%;航道浚深至10.5 m时,航道落潮水流输运能力减少80%~95%,航道涨潮水流输运能力强于落潮的范围相比现状增大约80%,当周边泥沙进入航道后,不利于泥沙的向外输运。Sheyang Port is located in the silty shoal in northern Jiangsu,with relatively poor water depth condition and strong silting intensity.In this paper,a two-dimensional tidal flow mathematical model is constructed to study the process of water transport capacity from the current situation to dredging to the design of the bottom elevation.The results show that with the waterway dredging deepen,the overall water velocity in the waterway shows a decreasing trend.The degree of decrease of water velocity is proportional to the dredging depth of the waterway.The maximum decrease of the rising jet is 43.4%~61.7%,and the maximum decrease of the falling jet is 39.8%~58.5%.When the dredging depth of the waterway is 6.5 m,the transport capacity of the waterway falling tide decreases by 40%~80%.When the dredging depth of the waterway is 10.5 m,the transport capacity of the waterway falling tide decreases by 80%~95%.The transport capacity of the waterway rising tide is stronger than that of the falling tide,which increases by about 80%compared with the current situation.When the surrounding sediment entered the waterway,it is not conducive to the outward transport of sediment.

关 键 词：射阳港 航道疏浚 数值模拟 水流输运 挟沙能力 

分 类 号：U616[交通运输工程—船舶及航道工程]