U-shaped concrete beam bridge girder erection machine

Abstract

The invention provides a U-shaped concrete beam bridge girder erection machine, which comprises a bridge girder erection machine main beam, a front crown block, a back crown block, a telescopic No. 1 landing leg, a telescopic No. 2 landing leg, a telescopic No. 3 landing leg and a U-shaped concrete beam hanger, wherein the front crown block and the back crown block walk on the bridge girder erection machine main beam, and are provided with crown block transverse beams and crown block transverse moving mechanisms walking on the transverse beams; the U-shaped concrete beam hanger is connected with the crown block transverse moving mechanisms; and the bridge girder erection machine is further provided with a hanging construction platform, a front beam conveying trolley, a back beam conveyingtrolley and a temporary rail. In the invention, an original bridge girder erection machine can be improved specific to the characteristics of a U-shaped concrete beam, so that the problem of bridge girder erection caused by a U-shaped beam structure can be solved; convenience is brought to bridge girder erection construction according to the characteristics of the U-shaped beam structure, so thatthe bridge girder erection machine provided by the invention is suitable for U-shaped concrete beams; and crane hoisting or gantry crane installation is not required in U-shaped concrete bridge girder erection, so that the construction cost and difficulty can be greatly lowered, and the construction quality can be improved.

Description

technical field [0001] The invention relates to the field of bridging machinery. Background technique [0002] U-shaped concrete beam, as a kind of down-loaded structural section, has the advantages of good noise reduction effect, low building height, and high utilization rate of section space. Generally, it is constructed by factory prefabrication and transported to the site for installation, and has been applied in many rail transits at home and abroad. Since the U-shaped concrete beam is an open section, and has the shape characteristics of large top and small bottom, left and right asymmetry, and a relatively thin bottom plate, the U-shaped concrete beam itself cannot bear large concentrated forces and has weak torsion resistance. If the traditional bridge erecting machine is directly used to erect the girder, the force of the outriggers configured on the girder is too concentrated to easily damage the girder bottom plate and the moment to the pier cover girder is too l...

AI Technical Summary

Problems solved by technology

Since the U-shaped concrete beam is an open cross-section, and has the shape characteristics of large top and small bottom, left and right asymmetry, and a relatively thin bottom plate, the U-shaped concrete beam itself cannot withstand large concentrated forces and has weak torsion resistance.

If the traditional bridge erecting machine is directly used to erect the girder, the force of the outriggers configured on the girder is too concentrated to easily damage the girder bottom plate and the moment to the pier cover girder is too large, and the center of gravity cannot be accurately grasped when lifting the U-shaped concrete girder , it is easy to deflect and distort the suspended beam, and the embedded parts added for the installation of the temporary track have a certain impact on the life of the U-shaped concrete beam with the characteristics of a relatively thin floor. After the tensioning, grouting and beam erection are in place, the suspension rod removal, support grouting and other processes are difficult to operate

Therefore, at present, the installation of U-shaped concrete beams is carried out by crane or gantry crane. However, this is greatly affected by geographical conditions, especially when there are many rivers, which limits the large-scale promotion of U-shaped beams.

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