A construction method for the steel-concrete transition section of a separated railway bridge

Abstract

A separate railway bridge steel mixed transition section structure construction method.It includes the production of outsourced steel plates and temporary steel pads; wrapped the steel sleeve box with a pier pillar template, and the outsourced steel plate is lifted together with the pier pillar template;The first concrete pouring is performed inside the steel sleeve box; the pier pillar template is removed, and the steel beam is hoisted; the connecting parts on the steel plate and the steel beam are welded; the second concrete pouring and other steps.The effect of the present invention: The steel mixed transition section is set out of the outsourced steel plate on the outside of the pier pillar. The lower part of the outsourced steel plate is poured together with the pier column, and the upper part is welded with the steel beam.Set up temporary steel pads, and can form an overall structure with steel concrete pier columns, and jointly bear the upper load to ensure the overall stability of the lower part of the steel tank arch.Suitable for large span steel beams and cannot be installed at one time.

Description

technical field [0001] The invention belongs to the technical field of railway bridge construction, in particular to a construction method for a separated railway bridge steel-concrete transition section structure. Background technique [0002] A railway bridge is a structure built for railways to cross rivers, lakes, straits, valleys or other obstacles, and to realize the three-dimensional intersection of railway lines and railway lines or roads. Among them, the steel tie arch substructure of the steel tie arch bridge usually adopts reinforced concrete pier + steel beam structure. Since the steel beam is light and the span is small, in order to ensure the effective connection between the steel beam and the reinforced concrete pier, It can also better play the role of temporary support and adjustment of steel beams. Usually, a steel-concrete transition section is set at the connection between the reinforced concrete pier column and the steel beam. The traditional steel-conc...

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Problems solved by technology

However, these two structures are mainly used for portal piers with small spans, light steel beams and small cross-sectional dimensions. If the steel beams require a large span and need to cross a busy railway line, in this case, The cross-section of the manufactured steel beam will be relatively wide and heavy. Obviously, the above-mentioned traditional steel-concrete transition section structure can no longer meet the requirements of use.

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