The invention provides an 80-meter-span width
steel box girder in-
plant full-span
assembly double-width erecting construction method. The 80-meter-span width
steel box girder in-
plant full-span
assembly double-width erecting construction method comprises the following steps that first, a bottom plate unit (2), a partition plate unit (3), an inclined web
T beam unit (4) and a
cantilever unit (5) are machined by applying a BIM technology; second, a
steel box girder general-
assembly bed jig (1) is arranged in a general-assembly area of a beam
plant; third, the bottom plate unit (2), the partitionplate unit (3), the inclined web
T beam unit (4) and the
cantilever unit (5) are machined, and all components are assembled; fourth, acceptance inspection is conducted after
general assembly of an 80-meter steel
box girder (6) is completed; fifth, the steel
box girder (6) is transported through a combined modular beam transporting vehicle (7); sixth, beam feeding is conducted; seven, beam fallingis conducted; and eight, the left and right widths of the full-span steel
box girder are erected. The 80-meter-span width steel box girder in-plant full-span assembly double-width erecting construction method can be suitable for inland areas and can also be suitable for coastal areas, the field
workload is decreased, human input is reduced under the current broad environment of high labor cost, and the cost is saved.