Mounting system of steel truss girder bridge

Abstract

The invention relates to a mounting system of a steel truss girder bridge. The system comprises a temporary buttress mechanism, a horizontal rotating disc mechanism and a locking pier structure; the temporary buttress mechanism used for placing small sections of steel beams and pushing the small sections of steel beams to a preset position on the top of a main pier, so that two small sections of steel beams are folded to obtain a large section of steel beams; the horizontal rotating disc mechanism comprises a horizontal rotating disc which is arranged on the top of the main pier and is used for horizontally rotating the large section of the steel beam to a preset position; and the locking pier structure is provided with a locking structure for locking the side span end of the large sectionof the steel beam at the preset position. The steel beam large section is prefabricated in a factory, the construction quality of the steel beam large section is guaranteed, influence of a field construction process on stress of a main beam structure is reduced, and overall installation of the steel beam large section is achieved. Meanwhile, by arranging the temporary buttress mechanism and the locking pier structure, occupation of roads and channels under the bridge is avoided, and passage of the roads and the channels under the bridge is not hindered in the bridge construction process.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to an installation system of 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 s...

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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