上海国际航运中心洋山深水港工程泥沙问题研究综述

Overview to research on engineering sediment problems of international shipping center of Shanghai Yangshan deep water harbor

洋山深水港海区水深、流大、含沙量高、水流流态紊乱,泥沙淤积问题是建港中的关键问题。文章总结了1998年以来在洋山深水港泥沙方面的研究工作,介绍了研究中采用的手段和方法,归纳总结了洋山深水港区泥沙研究的科研成果及创新点,并对研究成果的科学性作出评述。研究认为,洋山港海域泥沙运动形态以悬移质为主,潮流对泥沙具有起悬和搬运双重作用,水流强弱是港口建成后水深维护的关键;一、二期工程方案封堵小洋山—镬盖塘—小岩礁汊道,建设顺岸式码头,不宜采用挖入式港池方案;北港区规划方案以汊道方案较为稳妥;远景规划方案可采用单通道的南北双汊道规划方案;并基于平衡含沙量理论,提出了海床冲淤演变预测公式和顺岸式港池淤积预报公式。

It is the features of deep water depth,rapid current,high sediment concentration and turbulent flow condition in Yangshan deep water harbor,and sediment siltation is the crucial problem.In this paper,the works and researches on sediment of Yangshan deep water harbor were summarized,and the measures of the research were introduced.It was induced the research results and the innovation points of the sediment research in Yangshan deep water harbor,evaluation was made for the science of the research results as well.It indicates that the sediment movement form is dominated by suspended load,and the tidal current has double functions of suspension and transportation to the sediment,which means that the current intensity is the key factor to maintain the depth.For the branches of Xiaoyangshan,Huogaitang and Xiaoyanjiao obstructed in 1st phase and 2nd phase projects,the parallel basin constructed is better than the excavated-in basin.The branch channel scheme for north harbor block is reliable,and the double channels for north and south scheme of single channel is suggested in the perspective plan.Based on the equilibrium sediment concentration theory,the prediction formulas of seabed evolution and sediment siltation for parallel basin are proposed.