Installation method of steel truss girder bridge

Abstract

The invention relates to an installation method of a steel truss girder bridge. Build temporary pier structures on both sides of the bridge, and place the two small steel beam segments on the temporary pier structures on both sides respectively; At the preset position on the top of the main pier, the closed ends of the two small steel beam sections are aligned and closed to obtain the large steel beam section; the large section of the steel beam is horizontally rotated by the turntable to the preset position, and the side span end of the large section of the steel beam is locked; The side span ends of the steel girder large segment are connected with the steel girder sub-segment to obtain a steel truss girder bridge. This application realizes the prefabrication of the large section of the steel beam in the factory, ensures the construction quality of the large section of the steel beam, reduces the impact of the on-site construction process on the force of the main beam structure, and realizes the overall installation of the large section of the steel beam.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a method for installing a steel truss girder bridge. Background technique [0002] Steel truss girder bridges use steel trusses as the main load-bearing structure of girder bridges. Generally, the space structure is composed of two main trusses, longitudinal connecting systems and horizontal connecting systems. In the prior art, conventional construction techniques for the main girder of long-span steel truss girder bridges are usually constructed by segmental cantilever assembly or jacking methods. When the segmental cantilever is constructed by assembly, the construction period is relatively long, and there are many assembly processes on site, which affects the construction accuracy and connection quality of the bridge. For girder bridges with large spans, the construction of the bridge using the jacking construction method requires auxiliary piers to be set up sec...

AI Technical Summary

Problems solved by technology

When the segmental cantilever is constructed by assembly, the construction period is relatively long, and there are many assembly procedures on site, which affects the construction accuracy and connection quality of the bridge

For girder bridges with large spans, the construction of the bridge using the jacking construction method requires auxiliary piers to be set up section by section, which affects the navigation or traffic within the span range, which greatly restricts the construction space and increases the construction workload. Pushing construction has a certain influence on the line shape of the bridge and the stress of the beam body during the construction stage, which is unfavorable to the stress of the bridge structure

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