Continuous steel truss bridge side span rapid closure construction system and construction method

Abstract

The invention provides a continuous steel truss bridge side span rapid closure construction system and a construction method. The system is provided with a 600t pier-crossing gantry crane, a temporarysupport, a temporary support pad and a reaction frame traction system, wherein the temporary supporting pad is composed of a sand barrel, a steel sleeper and a tetrafluorohydrazine sliding plate, thetemporary supporting pad is integrally located on the temporary support, and a reaction frame traction system is installed on a lower chord of a corresponding temporary closure point and is composedof a reaction frame, a 200t double-acting jack and a PLC synchronous numerical control hydraulic terminal. The method and the system can effectively solve the problem that a temporary closure sectionneeds a matching and cutting process or needs to repeatedly adjust the installation position and the line type of a steel truss girder, reduce the equipment investment, shorten the construction period, save the measure cost and reduce the construction safety risks.

Description

technical field [0001] The invention relates to the field of fast closing construction of side spans of continuous steel truss girder bridges, in particular to a construction system and method for fast closing side spans of continuous steel truss girder bridges. Background technique [0002] The three-span continuous steel truss girder structure is generally divided into lower triangular area, upper triangular area, side span, middle span and closing section, and the construction process sequence is lower triangular area→side span→upper triangular area→middle span→closing section. The conventional process of cross-span steel truss girders is installed with a support system, and the installation sequence of side-span steel truss girders is installed from the side-span direction to the mid-span direction. Segmented pre-deflection is adopted, and then the temporary closing section of the side-span steel truss girder is installed and constructed, and finally the installation pos...

AI Technical Summary

Problems solved by technology

[0002] The three-span continuous steel truss girder structure is generally divided into lower triangular area, upper triangular area, side span, middle span and closing section, and the construction process sequence is lower triangular area→side span→upper triangular area→middle span→closing section. The conventional process of cross-span steel truss girders is installed with a support system, and the installation sequence of side-span steel truss girders is installed from the side-span direction to the mid-span direction. Segmented pre-deflection is adopted, and then the temporary closing section of the side-span steel truss girder is installed and constructed, and finally the installation position and line shape of the steel truss girder are adjusted in segments. This process has a long construction period and high cost measures, and the steel truss girder is adjusted repeatedly The installation location will bring certain safety risks and potential safety hazards

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