上海洋山深水港区四期工程海域海床演变分析

Analysis of Seabed Evolution of Phase Ⅳ Project Sea Area in Shanghai Yangshan Deep Water Port Area

本文根据洋山深水港区2009年-2013年水深、水文泥沙等现场观测资料,独创地从整体到局部分析了洋山港海域和四期工程水域的冲淤变化情况,为全球规模最大自动化程度最高的码头——上海港洋山深水港区四期码头的顺利开港提供了技术保障。主要结论如下：在围堰工程投产四年后,在新的工程边界条件控制下,洋山深水港区海域主通道继续表现为主通道西北部冲刷、小洋山前沿护岸水流的贯通、主通道中部及南部淤积的分布特征;颗珠山汊道的泄水出沙与四期工程前沿水域的持续冲刷,极大地减轻了主通道的泄水出沙压力,为四期工程水域疏浚增深的维持提供了天然潮动力。

Based on the field observation data such as water depth, sediment during 2009--2013, changes in erosion and siltation in Yangshan harbor area especially in phase Ⅳ port area have been analyzed in depth in this paper. The main conclusions are as follows： After four years of commissioning of the cofferdam project, it has been keeping the distribution of scouring in the northwest of the main channel, smooth bank protection flow in front of Xiao Yangshan and silting in the mid south of the main channel; And the continuous scouring in front of phase Ⅳ port area and the draining of Kezhushan branch greatly reduce the draining and sediment outflow stress for the main channel, and will also provide natural tidal power for deepening the phase Ⅳ project area.