跨河建筑物控制下长江扇沱水道航道布置

Channel layout of Shantuo waterway in the Yangtze River under control of river crossing structures

渝怀铁路长寿长江大桥于三峡水库变动回水区长江扇沱水道跨越长江,水道被长寿桥主跨桥分为左右两孔,该桥梁不满足I级航道单孔双向或双孔单向通航净空尺度要求。从通航安全角度出发,结合代表船型及航道特点,以《航道工程设计规范》要求的I级航道宽度作为跨河建筑物的最小跨度,结合河道条件在高水位期开通右孔为辅助通航孔,通过合理设置浮标界定桥区通航水域,并采取加装桥梁防撞主动预警系统等措施保障通航安全。

The Changshou Yangtze River Bridge from Yubei to Huaihua Railway crosses the Yangtze River at the Shantuo Waterway in the fluctuating backwater area of the Three Gorges Reservoir.The waterway is divided into left and right navigation holes by the main span bridge of Changshou Bridge. The bridge does not meet the requirements for the navigation clearance of single span two-way or double span one-way in Class I channel. From the perspective of navigation safety, this paper takes the width of Class I channel required by the Code for Design of Waterway Engineering as the minimum span of river crossing structures combining with representative ship types and channel characteristics, opens the right hole as an auxiliary navigation hole in combination with river channel conditions during high water level periods, defines the boundaries of the navigable water area in the bridge area by reasonably setting buoys, and takes measures such as adding a bridge anti-collision active early warning system to ensure navigation safety.