Manufacturing Technology of The Upper Beam of the Zangke River Large Bridge
Welding deformation control in the manufacturing of beams with orthotropic bridge panels has always been a difficult problem in the industry.ZangKe River Bridge was originally a structured structure with ultra-short orthotropic bridge panels.The narrow and long structure was much more difficult to control deformation than previous similar structures.The uneven welding amount between the upper and lower beams would make it extremely difficult to control the welding deformation.Moreover,the upper beam was an integral part of the main transverse truss of the bridge and was connected by high-strength bolts with the main girder,the longitudinal beam of the bridge panel,the U rib and the crosslink.According to the manufacturing difficulties,the manufacturing schemes such as pre-camber setting of beam web,step assembly of bridge floor block,flip assembly welding on beam,CNC drilling of main hole group after the whole welding is qualified、studied and determined.The scheme is reasonable and feasible through practice.
ultra short orthotropic deckmain transverse trusswelding deformationcamberaccuracy of holes
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