苏北辐射沙洲小庙洪水道人工深水航道建设条件分析

Construction condition analysis of Xiaomiaohong waterway artificial deep-water channel at radial sand ridges in north Jiangsu

针对在苏北辐射沙洲海域是否具备建设深水航道条件有待深入研究的现状,围绕该海域即将建设的首条人工深水航道——吕四10万吨级深水航道建设工程,在归纳工程海区水沙运动特性和岸滩演变趋势的基础上,结合试挖槽回淤分析和水沙数学模型研究,对辐射沙洲南缘小庙洪水道深水航道的建设条件进行分析和探讨。研究结果表明:小庙洪南水道水流沿深槽、潮动力较强,含沙量总体不大,近期深槽格局相对稳定,为吕四10万吨级深水航道的建设创造了有利条件;正常天气情况下航道回淤强度不大,即使在5 a一遇大风作用下,航道回淤也并不太严重;小庙洪南水道基本具备10万吨级深水航道的建设条件。

Due to lack of research on the construction condition of the artificial deep-water channel in the radial sand ridges artificial 100 000 area of the south Yellow Sea, we analyze comprehensively the construction condition of Lyusi DWT deep-water channel based on the research on water flow condition, sediment condition, seabed evolution and siltation intensity. The results show that the water flow is strong and seabed is stable. Furthermore, the results of the trial dredged channel observation and back silting prediction show that the siltation intensity is not serious under normal weather, and even under 5-year frequency wind. So it＇s basically suitable for constructing 100 000 DWT deep-water channel at the southern channel of Xiaomiaohong waterway.