透空格栅鱼巢排水下抛投控制

Underwater throwing control of fish nest row with permeable grille

透空格栅鱼巢排作为一种应用于生态环境改良中的新型薄壁预制构件,可以在保砂的基础上保持水体与河床间的连通,对水下微生物环境进行局部改善,进而起到保护长江的重要作用。结合长江干线武汉—安庆段航道整治工程Ⅲ标段生态涵养试验区鱼巢排施工的精准控制,对水流作用下鱼巢排安放过程中的漂移进行现场观测。基于Morison方程的数值模型和漂移距经验公式对其进行对比估计,最终对鱼巢排的抛投施工进行数值修正。

As a new type of thin-walled prefabricated component applied in ecological environment improvement,the fish nest row can maintain the connection between the water body and the riverbed on the basis of sand protection and locally improve the underwater microbial environment,thereby playing an important role in protecting the Yangtze River.The fish nest row is constructed in the ecological conservation pilot area of the waterway regulation project(SectionⅢ)in the Wuhan-Anqing section of the main line of the Yangtze River.Combined with the precise control of the construction,on-site observation of the drift of the fish nest row in water flow is carried out.It is compared and estimated based on the numerical model of the Morison equation and the empirical formula of drift distance.Finally,the numerical correction is made to the throwing construction of the fish nest row.