武桥水道水动力特性与潜洲演变研究  

On Hydrodynamic Characteristics of Wuqiao Waterway and Qianzhou Shoal Evolution

作　　者：陈立[1] 孙亮[1] 吴娱[1] 何娟[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《水运工程》2008年第6期102-107,共6页Port & Waterway Engineering

基　　金：国家科技支撑计划项目(2006BAB05B03-05);973项目(2003CB415205);国家自然科学基金项目(50479036);湖北省创新群体基金项目(2003ABA195);博士点基金项目(20020486017)

摘　　要：武桥水道枯水期碍航与汉阳边滩的发育程度直接相关,而汉阳边滩的发育又与潜洲演变紧密相连。采用定床模型试验结合原观资料分析的方法,分析武桥水道河段水流运动特性、潜洲年内年际的演变规律以及两者之间的内在联系。结果表明:武汉河段周界条件和水流运动规律使得本河段汛期水流动力轴线顺直,潜洲至大桥间水流动力轴线居中靠左;而枯水期水流动力轴线弯曲,在潜洲头部和尾部形成斜向水流,水流动力轴线在潜洲尾部以下由左侧过渡到右侧。不同流量水流动力特性的变化直接决定了年内潜洲的冲淤变化规律:洪水期潜洲淤积,头部上延;尾部下挫;而枯水期冲刷,头部后退,尾部上提。The navigation-obstruction of the Wuqiao waterway in dry-period has direct relations with the extent of Hanyang Shoal＇s development while the growth of Hanyang Shoal is in close relation with Qianzhou Shoal evolution. In this paper, the characteristics of flow movement on the reach of Wuqiao waterway, evolution laws of Qianzhou Shoal and the inherent relations between them are analyzed by combining the fixed bed tidal model test and field observation data. The result shows that the boundary condition and rules of flow movement on Wuhan reach have caused the following two effects： The flow dynamic axis on this reach is straight in flood season and the flow dynamic axis between Qianzhou Shoal and Daqiao Bridge is at the left of the middle; During dry period, the flow dynamic axis is bend, and oblique flow is formed at the head and tail of Qianzhou Shoal, and the flow dynamic axis makes a transition down the tail of Qianzhou Shoal from left to right. Changes of hydrodynamic characteristics under different flow discharges directly determine the annual law of scouring and deposition variation： In flood season, Qianzhou Shoal deposits with the head extending upwards and the tail lowering; During dry period, Qianzhou Shoal scours with the head back off and the tail going up.

关 键 词：武桥水道 潜洲 水流运动 演变 

分 类 号：U612[交通运输工程—船舶及航道工程]