Construction Technology of Large-span Arch Bridge with Strong Skeleton Pipe Pressing and Arch Ring Wrapped with Concrete
Combined with the example of Zhengwan High-speed Railway Fengjie Meixi River Two-Lane Special Bridge Project,the research was carried out on the construction technology of large-span arch bridge with strong skeleton pipe pressing and arch ring wrapped with concrete.Through the concrete compression injection process test and vacuum-assisted compression injection construction,all 8main chord tubes were successfully compressed at one time.The arch ring outsourcing concrete was constructed in ring segments and the construction was optimized through a series of technological innovations and organization optimizations,such as rationally dividing the construction segments,designing of the bottom-molding hanger,and the arch-arching on the tower crane,which significantly improved the construction work efficiency and shortened the working period.
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