Bridge girder erection machine and construction method for erecting widened girder

Abstract

The invention relates to a bridge girder erection machine and construction method for erecting a widened girder. The bridge girder erection machine is used for constructing the widened girder after amain line box girder is erected, and comprises a pier top framework, a longitudinal beam, a transverse moving mechanism and a hoisting mechanism, wherein the pier top framework comprises two parallelpier top beams, and the pier top beams are connected through two joining beams; two stand columns I and two stand columns II are arranged under each pier top beam, the two stand columns I are arrangedbetween the two stand columns II, stand column I supporting oil cylinders and travelling mechanisms are arranged under the stand columns I, stand column II supporting oil cylinders are arranged underthe stand columns II, the stand columns I are used for being supported at the positions of main line box girder web plates, and the stand columns II are used for being supported at the positions of piers of the widened girder. The bridge girder erection machine has the advantages that the pier top framework adopts a symmetric structure, the whole machine automatically passes through holes, the construction efficiency is high, and the safety and the stability are good, and erection of the widened box girder can be completed without auxiliary facilities; and the construction method is reasonable in process and high in efficiency, and can effectively shorten the construction period.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a bridge erecting machine for erecting widened beams. Background technique [0002] Bridge construction is an important part of modern basic transportation construction, and bridge erecting machine is the main equipment of bridge construction. Widening of the original bridge, construction of the ramp at the entrance and exit of the expressway / viaduct generally uses a split-width beam structure, that is, a split-width beam bridge pier is set next to the original box girder of the main line, and then prefabricated beam bridge piers are erected on the split-width beam bridge pier Spelled wide beams. [0003] The erection of existing widening beams generally adopts the method of lateral movement of the top of the pier. The premise of this method is that the bridge piers of the widening beams are integrated with the main line piers, and there is enough space between the top of the ...

AI Technical Summary

Problems solved by technology

[0003] The erection of existing widened beams generally adopts the method of lateral movement of the top of the pier. The premise of this method is that the bridge piers of the widened beams are integrated with the main line piers, and there is enough space between the top of the bridge pier and the lower part of the concrete beam to install the transverse movement beam device. , and the main line box girder needs to be erected first before the ramp girder can be erected, which affects the erection period of the main line box girder; The bridge erecting machine is affected by the bearing capacity of the bridge piers, and the load acting on the bridge piers is too large, so that the frictional bridge piers will sink under a large force, and even other hazards such as pier tilting will occur

[0004] Although the Chinese utility model patent announcement document CN208501523U discloses "a new type of bridge erecting machine for erecting wide beams", this type of bridge erecting machine has few supporting points, a high center of gravity, a complex structure, and unreasonable process design. The efficiency of splicing beams is low, which cannot well meet the requirements of large-tonnage splicing and widening beams

[0005] Therefore, in the prior art, there is a lack of a wide-split beam bridge erecting machine with high construction efficiency, stable construction process, and convenient hole passing, and corresponding construction methods.

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