长江口南北槽鱼嘴护底结构物水毁原因分析

Flood damage of fish mouth bottom structure in south and north passage diffluence pass in the Yangtze estuary

通过走航测量及坐底观测等方法,对长江口南北槽分流鱼嘴工程护底结构物水毁区域进行测量。所得数据资料分析结果表明,引起导堤南侧水毁的主要原因在于近底垂向紊动水流造成排体间隙淘刷和护肩块石失稳,修复工程应兼顾护底结构物的稳定性及护底作用。

By ship board measurement and the bottom tripod survey system, we investigate the flood damage area of fish mouth bottom structure in the south and north passage diffluence pass in the Yangtze estuary. The data analysis shows that the main reason for the south side flood damage is the scouring under the flexible mattress and the instability of concrete stone caused by the bottom vertical turbulent flow. The repair work should guarantee both the stability and the bottom protection effect of the bottom structure.