长江下游口岸直水道鳗鱼沙心滩头部护滩带工程结构细部处理

Local optimization on engineering structure of protection belt of Manyusha beach

鳗鱼沙心滩头部守护工程采用护滩结构,在受径流和潮汐双重影响条件下的应用尚属首次。为保证鳗鱼沙心滩守护工程的质量和整治效果,并保持整治工程结构的稳定性,在分析长江下游口岸直水道鳗鱼沙心滩段水流特性的基础上,根据局部水槽模型成果,对鳗鱼沙心滩头部守护工程护滩带结构进行了细部处理,在保证工程结构稳定的基础上,减少了水毁损失,降低了工程维护成本,节约了工程量,也为相关工程的设计与建设提供参考。

The beach protection engineering was applied for the first time to the head of Manyusha shoal under the dual influences of runoff and tide. In order to ensure the quality, regulation effect, and stability of Manyusha shoal head protection engineering, we carried out some detail treatments for Manyusha shoal head protection engineering based on the analysis of flow characteristics of Manyusha shoal reach in Kou＇an straight reach of the Yangtze River and according to achievements of the local scour flume test, by which, not only the stability of engineering structure was ensured, but also the loss of flood damage was reduced and the cost of project maintenance was cut down. It may serve as a reference for related engineering design and construction.