汉江雅口航运枢纽工程施工导截流设计

On Construction Diversion and Interception of Yakou Shipping Hub Project of Han River

汉江雅口航运枢纽坝址区流量变化较大,河床覆盖层主要为粉细沙,加之导流初期枯水期已过去一半,施工导截流设计难度很大。根据工程实际情况,并通过水力学计算和数值模拟分析,该工程一期导流围堰用管袋沙和模袋混凝土护坡代替传统的钢筋石笼和雷诺护坡,采用管袋沙和块石进行双戗堤截流,二期导流围堰用管袋沙护坡,采用沙卵石、块石进行双戗堤截流。

The dam site of Yakou shipping hub of Hanjiang River has great variation in the flow rate,and the covering layer of the riverbed is mainly silt and fine sand.Half of the initial dry period of diversion has passed,and the design of construction diversion and interception is very difficult.According to the actual situation of the project,combined with hydraulic calculation and numerical simulation analysis,the project is divided into two phases of diversion.The first phase of diversion cofferdam uses pipe bag sand and mold bag concrete to replace the traditional reinforced gabion and Reynold slope protection,and adopts pipe bag sand and block stone to stop the flow of double berm.The second phase diversion cofferdam uses pipe bag sand to protect the slope,and adopts sand pebble and block stone to intercept the flow of the double berm.