Movable asymmetric bridge cantilever assembly device and application method thereof

Abstract

The invention discloses a movable asymmetric bridge cantilever assembly device and an application method thereof. The bridge cantilever assembly device comprises a first crane, a second crane and a girder transporting vehicle, the girder transporting vehicle is positioned between the first crane and the second crane, the first crane comprises a first main girder and a first overhead crane positioned on the first main girder, the second crane comprises a second main girder and a second overhead crane positioned on the second main girder, the first main girder is connected with the second main girder, both the first overhead crane and the second overhead crane can move along the first main girder and the second main girder at the initial stage, and the first crane and the second crane are disconnected and move to installed sections of two sides after a first girder section is constructed. The application method particularly includes the steps: assembling and fixing the bridge cantilever assembly device; installing the first girder section; lifting and transporting a second girder section to the girder transporting vehicle from one side by the first overhead crane; conveying the second girder section to the lower portion of the second overhead crane by the girder transporting vehicle; lifting the second girder section to an installation position by the second overhead crane; adjusting and fixing falling positions of two symmetrical block sections, and installing the second girder section; repeating an installation mode of the second girder section to install the rest girder sections.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a mobile asymmetric bridge cantilever assembly device and an application method thereof. Background technique [0002] At present, the bridge cantilever assembly of the "U+box" prefabricated structure mainly uses symmetrically arranged mobile bridge deck cranes for construction, that is, the bridge deck cranes are arranged symmetrically on the starting block with the pier as the center, and the current prefabricated girders are installed symmetrically. Then move the bridge deck crane symmetrically forward to the next installation position, lift and install the next prefabricated beam section symmetrically, and repeat the above steps until all the beam sections on both sides of the pier are installed. [0003] When using this type of equipment, it is necessary to follow the requirements of the "cantilever balanced assembly process", that is, the prefabricated segments are lifted a...

AI Technical Summary

Problems solved by technology

[0003] When using this type of equipment, it is necessary to follow the requirements of the "cantilever balanced assembly process", that is, the prefabricated segments are hoisted and installed symmetrically on both sides of the pier. It can be lifted vertically and installed symmetrically”, and its use has certain limitations

In actual construction, since bridges using cantilever assembly technology usually need to span existing rivers, railways, highways and other structures, if mobile bridge deck cranes are used for installation, they often cannot meet the transportation conditions in the above premise, resulting in "Symmetrical lifting and installation cannot be realized on both sides of the pier"; or it can meet the transportation conditions, but the cost is too high, which is not economically cost-effective

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