深水航道整治中新型结构淹没丁坝与水流相互作用

Interaction between new submerged spur dike and water flow in deepwater channel regulation

大型混凝土齿形丁坝首次应用于深水航道整治工程中,其与水流相互作用的影响并不清晰。通过理论分析与数值模拟的方法对新型丁坝的壅水特性进行研究,并通过与其它坝型结构对比分析了新型丁坝对过坝水流的影响,进而通过阻挡流量的表征方法对新型丁坝的水流力计算方法进行探讨。研究发现新型丁坝壅水公式能够较为合理地预测其壅水值,且由于基床的存在,新型丁坝对过坝水流的影响较小,同时,通过阻挡流量表征的水流力计算公式形式更为简便。新型丁坝的引入对长江沿岸水沙及生态平衡起到保护作用,其研究成果可为新型丁坝的设计及应用提供科学的理论指导,也对其他新型结构设计具有借鉴价值。

The large concrete toothed spur dike was applied firstly in the deep-water channel regulation project,and the interaction between the large concrete toothed spur dike and the water flow is not clear.Through the method of theoretical analysis and numerical simulation,the paper studied the backwater characteristics of the new spur dike,the influence of the new type of spur dike on the water flow through the dam was analyzed by comparing with other dam types.Then,the paper discussed the calculation method of the water flow force of the new type ding dam by means of the representation method of the blocking flow.It is found that the new formula for the backwater of the dam can reasonably predict the backwater value of the dam,and due to the existence of foundation bed,the influence of the new type ding dam on the water flow through the dam is small.At the same time,the calculation formula of water flow force represented by blocking flow is more convenient.The introduction of the new spur dike protect water flow,sediment and the ecological balance along the Yangtze River,and the research results can provide scientific theoretical guidance to the design and application of new spur dike provides,which also has reference value to the other new structure design.