Arch-supported cable-stayed bridge beam vertical rotating and lowering closure method and bridge structure used in cooperation with same

Abstract

The invention provides an arch-supported cable-stayed bridge beam vertical rotating and lowering closure method and a bridge structure used in cooperation with the same, whichbelong to the technical field of bridge construction.The bridge structure comprises a main beam-cross beam connecting structure and a beam-arch tower connecting structure; the main beam-cross beam connecting structure comprises a steel box main beam and main beam connecting sections prefabricated and welded to the two sides of the steel box main beam. The cross beam-arch tower connecting structures are located on the twosides of the main beam-cross beam connecting structure, and each cross beam-arch tower connecting structure comprises a steel arch tower, an arch tower connecting section welded with the steel arch tower into a whole and a vertical closure section hinged to the arch tower connecting section through a vertical rotating hinge. After the vertical closure section is subjected to arch tower closure andmid-span closure, the vertical closure section is lowered to be welded with the main beam connecting section; the main beam connecting sections, the vertical closure sections and the arch tower connecting sections on the two sides of the steel box main beam form a steel cross beam. The problems that when an existing arch-supported cable-stayed bridge is subjected to incremental launching construction and crosses an existing line, a beam hoisting construction method causes potential safety hazards to the existing line, and efficiency is low are solved.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and specifically discloses a method for vertically rotating and lowering the beam of an arch-supported cable-stayed bridge and a bridge structure used in conjunction with it. Background technique [0002] With the increasing perfection of expressways and high-speed railway networks, there are more and more bridge structures crossing each other. For conventional arch-supported cable-stayed bridges, the construction method of steel beams is often hoisting construction. The steel beams are hoisted by a crane and connected to the tower columns on both sides to form a whole, and then the steel box girders are constructed on the steel beams. However, when the arch-supported cable-stayed bridge is pushed across the existing railway line, the structure of steel box girders arranged on steel beams will affect the clearance under the bridge, which does not meet the requirements for the safety h...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for vertically turning and lowering the beam of an arch-supported cable-stayed bridge and a bridge structure used in conjunction with it, so as to improve the jacking construction of the existing arch-supported cable-stayed bridge mentioned in the above-mentioned background technology when crossing the existing line. The beam hoisting construction method causes safety hazards and low efficiency to existing lines

Images