Concrete continuous beam bridge transformation construction method

Abstract

The invention relates to a concrete continuous beam bridge transformation construction method. The method comprises the following steps: dismantling a bridge deck pavement layer; arranging temporary buttresses on the two sides of a pier, and arranging first pad structures on the temporary buttresses; assembling a steel truss girder on the deck; rotating the steel truss girder to be borne on a first dip padding structure; anchoring the steel truss girder to the concrete continuous girder bridge through an anti-overturning system; dismounting, namely mounting a hanging system at the position, corresponding to the box girder section of a midspan closure, of the steel truss girder, anchoring the hanging system to the box girder section, cutting the box girder section, and lowering the box girder section by using the hanging system; and dismantling the rest box girder sections according to an inverse sequence of finished bridge pouring by using the processes in the dismantling step and a double-cantilever dismantling process; arranging a third pad structure at the top of the pier; rotating the steel truss girder to be borne on the third pad structure; arranging a steel cross beam support at the top of the pier; and rotating the steel truss girder to be borne on the steel cross beam support. The method is short in period, small in construction support amount and small in environmental disturbance.

Description

technical field [0001] The present application relates to the technical field of bridge engineering, in particular to a reconstruction construction method of a concrete continuous girder bridge. Background technique [0002] Due to structural problems of the bridge itself, urban planning, waterway and traffic facility upgrades, some early-built prestressed concrete continuous beam bridges have greatly restricted urban development in terms of load levels, navigation clearance, layout planning, etc., and need to be demolished and rebuilt . In the environment of reducing production capacity and promoting steel structure buildings, continuous steel truss beams have also been widely used. Therefore, keeping the substructure and span unchanged, removing the original concrete continuous girders and replacing them with continuous steel truss girders has become the primary choice for this type of bridge reconstruction. [0003] The conventional method for the reconstruction of conc...

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Problems solved by technology

[0005] The embodiment of the present application provides a construction method for the reconstruction of a concrete continuous girder bridge to solve the technical problems of large amount of construction supports, long construction period and large disturbance to the environment in the related art

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