鱼嘴坝在长江上游东溪口水道整治中的应用  

Application of fish-mouth dam in Dongxikou waterway regulation engineering in upper Yangtze River

作　　者：陈杏文[1] 胡江[2] 陈玉丹[1] 廖江花[1] 郭琦 

机构地区：[1]重庆交通大学水利水运工程教育部重点实验室,重庆400074 [2]重庆交通大学国家内河航道整治工程技术研究中心,重庆400074

出　　处：《人民长江》2018年第1期1-6,共6页Yangtze River

基　　金：国家自然科学基金项目(51379101);重庆交通大学研究生教育创新基金项目(CYS16175)

摘　　要：根据长江上游东溪口卵石分汊航道的演变特点及航道条件的变化规律,提出了以实施鱼嘴工程为主要整治措施的东溪口水道左槽整治思路。借助二维数学模型对三种鱼嘴布置方案进行对比分析,并通过通航水力指标从中选择了较优的布置方案。然后根据选定的布置方案结合动床物理模型试验,研究了该河段鱼嘴坝的水流泥沙特性及其坝头的局部冲刷特征,得出鱼嘴的布置对于优化分沙效果较为合理,试验还发现鱼嘴坝头部分冲刷较严重,需重视基础加固处理。相关结果可为东溪口水道整治效果的预测提供有力的参考,并可为类似工程提供技术借鉴。According to the evolution characteristics and the variation laws of channel condition of Dongxikou waterway, a peb- ble and braided reach of upper Yangtze River, the idea of regulating the left branch of Dongxikou waterway by fish - mouth dam was put forward. Two- dimensional mathematical model was used to compare three planned regulation measures, and the opti- mized one was selected in terms of navigation index. We also analyzed the flow and sediment characteristics of the fish - mouth dam and the jetty heads local scour by movable - bed mode] test. The results show that the arrangement of fish - mouth is rational for optimizing the flow and sediment diverting, the scouring effect is relatively serious at the jetty head area, where should be re- inforced. The results can provide reference for Dongxikou waterway regulation and similar projects.

关 键 词：物理模型试验 水流泥沙特性 坝头局部冲刷 鱼嘴坝 东溪口水道 

分 类 号：TV85[水利工程—水利水电工程]