Falling beam construction beam end sliding auxiliary device and use method

Abstract

The invention relates to a falling beam construction beam end sliding auxiliary device and a use method. The height of the device is greater than the height of a beam end support. The device comprisescushioning stones which can be fixed on two sides of a bridge abutment upper beam end support, wherein a heating element is embedded into each cushioning stone and can heat the cushioning stone to ahot melting state, the top surface of each cushioning stone is fixedly provided with a supporting element, the top surface of the supporting element is provided with a groove in which a plurality of rolling shafts are arranged, and the rolling shafts can roll in a longitudinal direction of a bridge in the groove, wherein the diameter of each rolling shaft is greater than the depth of the groove. By use of the sliding auxiliary device, the damage of the beam end support by a steel box beam during falling beam construction can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of civil engineering bridges, in particular to a beam end sliding auxiliary device for falling beam construction and a use method thereof. Background technique [0002] Steel-concrete composite box girder is a new type of structure developed on the basis of steel structure and concrete structure. It consists of an upper reinforced concrete slab and a lower steel box girder. The concrete slab and the steel box girder are connected by shear connectors. The upper concrete slab bears the compressive stress of the beam body, and the lower steel box girder bears the tensile force. Because this kind of structure can better exert the material performance, and has the advantages of small dead weight, good earthquake resistance and durability, and convenient construction, it is more widely used in highway bridge construction. [0003] However, for the steel-concrete composite continuous beam, because it is a statica...

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Problems solved by technology

[0004] The inventor found that although the "beam drop method" can effectively prevent the concrete slab from cracking in advance, in the process of beam drop from the top of the main pier, the main girder at the top of the main pier fell 50 cm, which made the main girder extend longitudinally, and the end of the main girder along the bridge Although the displacement is not large, due to the frictional resistance of the end support of the main beam, it is easy to cause longitudinal shear damage of the end support of the beam and affect the overall quality of the structure. At present, there is no good solution

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