Techniques in Construction of Long-span Concrete-filled Steel Tube Reinforced Skeleton Arch Bridges
The development of concrete-filled steel tube reinforced skeleton arch bridge construction technology in China has exerted a profound impact on global arch bridge construction.In this paper,the latest developments and technological innovations are introduced that contribute to continual span expansion.The construction challenges and essential technologies involved in long-span concrete-filled steel tube reinforced skeleton arch bridges are summarized.During the construction,the long-span concrete-filled steel tube reinforced skeleton arch bridges may have problems such as the complexities of assembling the reinforced skeleton,difficulties in pumping concrete into the steel tubes,high risks associated with external concrete pouring,and maintenance challenges.The crucial construction aspects,including the arch base,piers,reinforced skeleton,box girder,and the methods for placing concrete both inside and outside the steel tubes,are elaborated.Specific quality control measures for critical construction processes are proposed in details,aiming to guide the high-quality construction of these long-span bridges.For the construction of longer span concrete-filled steel tube reinforced skeleton arch bridges,the application prospects of new technologies such as automated welding for steel skeletons,control of deformation in mass concrete,and multi-parameter monitoring during the construction phases are available.
arch bridgereinforced skeletonconcrete-filled steel tubeconstructionquality control
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