上海常见海塘达标方案及其对降低堤顶高程敏感性的研究

上海地处长江三角洲前缘,海塘分处长江口及杭州湾北岸。随着沿江沿海经济、社会和产业发展,加上全球气候变化、海平面上升等海塘前沿水情、工情发生了较大变化,原有的设计标准不能满足规划的要求。故上海市水务局启动了新一轮的海塘达标建设。现以浦东某段海塘工程达标为例,梳理了海塘达标的基本思路,总结了海塘达标建设中加高墙顶高程、保滩促淤削弱外海来波及坡面加糙等三项基本措施,并分析了其对降低堤顶高程的敏感性。其成果可为海塘达标设计提供参考。

Study on Common Seawall Target Scheme and Its Sensitivity to Lowering Levee Top Elevation in Shanghai

Shanghai lies at the front of the Yangtze River Delta.The seawall is divided at the Changjiang Estuary and the north bank of Hangzhou Bay.With the economic,social and industrial development of coastal areas along the river,as well as global climate change,sea-level rise and other major changes in the situation of water and work in the front of the seawall,the original design standards cannot meet the requirements of the planning.Therefore,the Shanghai Municipal Water Affairs Bureau launches a new round of seawall target construction.Taking a seawall target project in Pudong as an example,the basic ideas of seawall target is sorted out.Three basic measures of heightening the elevation of the high wall top,protecting the beach to promote siltation and to weaken the incoming sea wave,and roughing the slope surface are summarized.Its sensitivity to lowering the elevation of the levee top is analyzed.The results can be refereed for the design of seawall target.