A lifting method of bridge girder body based on cover girder

Abstract

The invention discloses a bridge girder body lifting method based on a cover girder, includes the steps of installing a bridge jacking device between the cover beam and the bridge, the bridge jackingdevice has two left and right pairs of butt joint parts which are held and fixed to the cover beam, A support platform is fixedly for on that outer side of the respective two sides of the butt joint member, and a step of jacking up the bridge beam body by means of a jack on the supporting platform, characterized in that in the jacking process, a horizontal bearing plate horizontally arranged at the lower ends of two butt joint parts is used to convert the reverse acting force of the butt joint parts through the supporting platform into the internal stress of the horizontal bearing plate itself, thereby realizing the protection of the cover beam. The method can effectively prevent the cover beam at the position where the bridge jacking equipment is installed from being damaged due to excessive stress, improve the safety of the device, and better ensure the smooth lifting of the bridge beam body. Furthermore, the synchronous jacking can be realized to ensure the safety in the construction process.

Description

technical field [0001] The invention relates to the field of highway and bridge engineering, in particular to a method for raising a bridge girder body based on a cover beam. Background technique [0002] At present, most of the bridges in service in my country (especially curved continuous box girder bridges) will experience different degrees of expansion joint failure after several years of use, such as: shear failure, bulging on both sides, etc.; in addition, a large number of bridges Certain longitudinal and lateral displacements will occur under various dynamic effects (such as earthquakes, vehicle and ship collisions, etc.), and also under some static effects (such as: expansion joints are stuck, temperature effects, eccentricity of static and dynamic loads, etc.) Displacement in any direction is generated and gradually accumulated over time. These bridges with beam deflection have seriously threatened the safety of road operation. In addition, it is very necessary to l...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art above, the technical problem to be solved by the present invention is: how to provide a bridge girder that can complete the conversion of applied force during the lifting process of the bridge girder, avoiding damage to the cover girder due to excessive force, and improving the safety of the device. lifting method

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