In situ cast-in-situ steel girder railway bridge deck pre-stress concrete channel beam construction method

Abstract

The invention relates to a construction method for a railway bridge deck prestressed concrete trough beam of an original position cast-in-situ steel truss beam, comprising the following technique processes of: firstly, arranging a trough beam construction bottom die platform and a trough beam hoisting system in the steel truss beam after the side spans of the flexible arc steel truss beam are erected; secondly, installing a trough beam die plate on the platform, binding reinforcing steel bar, casting concrete trough beam and completing the prestressed construction of the trough beam; thirdly,hoisting the trough beam by the trough beam hoisting system from the bottom die platform, forwards moving the bottom die platform in a sliding way to a next beam site, putting down and installing thetrough beam in position; fourthly, installing a walking supporting frame and a slideway of the hoisting system, dragging the hoisting system to a next beam segment site; and fifthly, repeating the above four steps to complete the original position cast-in-situ construction of the trough beam. The invention has the advantages that the problems of the transportation and the erection difficulty of the trough beam for erecting after a beam field is prefabricated in traditional practices and the perstressed tensioning space of the beam body in the in-site cast-in-situ construction are solved, the construction materials are common Bailey beams and profile steels, and the hoisting equipment is a jack which is economic and easy to operate.

Description

technical field [0001] The invention relates to the construction method of the in-situ cast-in-place steel truss girder railway bridge deck prestressed concrete channel girder, especially suitable for the construction of railway bridges with large single-piece girder body tonnage, irregular structure size, prefabricated transportation and The specially designed beams, which are difficult to erect, can be hoisted and installed after casting in situ by this method, without the need for large-scale mechanical equipment, and the operation is more convenient. It belongs to the technical field of bridge construction. Background technique [0002] In existing high-speed railways, high speed, high comfort, and low noise during train operation require railway steel bridges to adopt ballast bridge decks. Therefore, prestressed concrete grooves are installed in the construction of steel truss flexible arch beams for the main spans of some super-large bridges. shaped beam. Usually, th...

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Problems solved by technology

The in-situ cast-in-place prestressed concrete channel girders on steel truss bridges have successfully solved the traditional method of transporting and erecting channel beams after the prefabrication of the beam field, and also solved the problems of on-site cast-in-place construction The problem of the prestressed tension space of the beam body saves costs during construction and is easy to operate

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