Rapid construction method for continuous steel truss girder flexible arch steel bridge

Abstract

The invention provides a rapid construction method for a continuous steel truss girder flexible arch steel bridge. While lower structure construction is performed, an initial inter-section steel girder assembling bracket and other brackets are arranged in a middle span; a girder erection crane is assembled on the initial inter-section steel girder assembling bracket; a steel truss girder is assembled; an arch erection crane is assembled; after the middle span steel truss girder is erected, the arch erection crane begins to erect a middle span flexible arch; retreat is performed after a side span steel truss girder is completed, and then part of inter-section side span flexible arch is erected; after the arch erection crane completes the middle span flexible arch erection, the side span part inter-section flexible arch erection continues to be completed; a temporary stance platform is arranged at the flexible arched girder end of the continuous steel truss girder, a closure gap positionis integrated; the girder erection crane is located on the temporary stance platform, a flexible arch closure section is mounted, and steel truss girder flexible arc mounting is completed. In the rapid construction method, the continuous steel truss girder and the flexible arch are synchronously constructed, which effectively shortens the installation period of the steel girder itself and effectively shortens the total construction period, and the construction quality is high.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering construction, and in particular relates to a rapid construction method of a continuous rigid truss girder flexible arch steel bridge. Background technique [0002] The construction method of the long-span rigid truss girder flexible arch bridge has a great influence on the construction cost and construction period. At present, the conventional construction method of this type of bridge is: (1) construct the substructure first and then construct the superstructure or although the superstructure and the substructure are constructed simultaneously, but the superstructure is not in the design plane or vertical position, it needs to be adjusted in place later; ( 2) The continuous rigid truss girder is constructed first, and then the flexible arch is constructed; (3) The closing mouth is usually set in the middle of the bridge span. The span layout of the main bridge of the Yinchuan Airport ...

AI Technical Summary

Problems solved by technology

The span layout of the main bridge of the Yinchuan Airport Yellow River Bridge on the Yinchuan Railway is as follows: 98m simply supported rigid truss girder + 2 × (3 × 168m) continuous rigid truss girder flexible arch + 98m simply supported rigid truss girder. The construction method, the pressure of the construction period is huge, and the construction cost is also greatly increased.

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