跨河大型拱管桥在无道路的情况下,普遍采用施工难度较低,安全性较高的满堂脚手架施工,而满堂脚手架受季节性洪水和航运的影响较大。我公司在施工安康铁路水源工程月河拱管桥时,采用单 In the absence of roads, large-span arch-bridge bridges across the river generally adopt the construction of full-height scaffolding with low construction difficulty and high safety, and full-length scaffolding is greatly affected by seasonal floods and shipping. My company in the construction of Ankang Railway Water Project Moon River arch bridge, the use of a single