Simply supported box girder falling alignment device and using method thereof

Abstract

The invention relates to the field of high-speed railway construction, and provides a simply supported box girder falling alignment device and a using method thereof. The simply-supported box girder falling alignment device comprises a laser radar range finder arranged at the front end of an erected simply-supported box girder and girder seam width monitors arranged on the two sides of the lower surface of a main girder of a bridge girder erection machine, and the girder seam width monitors are located above the rear end of the simply-supported box girder to be erected. The distance between the to-be-erected simply supported box girder and the erected simply supported box girder is estimated according to a video image acquired by the girder seam width monitor; then, the front hanging beamtrolley and the rear hanging beam trolley are controlled to enable the to-be-erected simply supported box girder to be close to the erected simply supported box girder; the to-be-erected simply supported box girder is controlled to descend slowly in the next step; the laser radar range finder starts to collect the actual distance between the to-be-erected simply supported box girder and the end face of the erected simply supported box girder; and the front hanging beam trolley and the rear hanging beam trolley are controlled again to enable the to-be-erected simply supported box girder to moveforwards or backwards to keep a distance required by the design with the erected simply supported box girder, so that girder falling alignment of the to-be-erected simply supported box girder can becompleted.

Description

Technical field [0001] The invention belongs to the field of high-speed railway construction, and specifically designs a simple-supported box beam drop beam alignment device and a use method thereof. Background technique [0002] At present, most of China's high-speed railway prestressed concrete simply supported box girders are prefabricated 24m, 32m and 40m prestressed concrete simply supported box girder in beam yard. The erection of 24m, 32m and 40m simply supported box girder generally adopts transportation. For the erection method of a separated frame or an integrated machine for transport and erection, the prior art bridge erector 10 includes a main beam 11 on which a front beam trolley 12 for lifting a simply supported box beam 30 to be erected and a rear crane The girder trolley 13, the front end and the rear end of the main girder 11 of the integrated bridge erecting machine are provided with a front car 14 and a rear car 15, respectively, and the front end and the rear...

AI Technical Summary

Problems solved by technology

The two drop beam alignment methods and the precise alignment effect have no essential change,

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