Derrick arrangement of tools for replacing steel arch bridge suspender and replacing method thereof

Abstract

The invention discloses a derrick arrangement of tools for replacing a steel arch bridge suspender and a replacing method of replacing the steel arch bridge suspender. The derrick arrangement of tools for replacing the steel arch bridge comprises limit devices arranged symmetrically on two sides of the suspender, steel wire ropes, an intermediate converting device, a steel strand and a pocket lifting device fixedly arranged below a crossbeam of the suspender. The limit devices comprises horizontal limit devices and vertical limit devices, wherein the horizontal limit devices are arranged on an arc face of the top portion of an arch ring, and the vertical limit devices are arranged at two sides of the arch ring. Rubber cushions are laid between the horizontal limit devices and the top face of the arch ring, and the steel wire ropes are wound on the arch ring and are fixed by the limit devices. Two ends of the steel wire ropes are connected with the intermediate converting device, the other end of the intermediate converting device is connected with the upper end of the steel strand, and the lower end of the steel strand is connected with the pocket lifting device. The bottom portion of the pocket lifting device is connected with a lifting jack used for tensioning the steel strand. The derrick arrangement of tools for replacing the steel arch bridge is used for the method of replacing the steel arch suspender. The derrick arrangement of tools for replacing the steel arch bridge and the method of replacing the steel arch bridge have the advantages of being good in applicability, simple in structure, convenient to operate, space-saving, safe, reliable and economical, and good in application prospects.

Description

technical field [0001] The invention belongs to bridge engineering, in particular to a tool suspender device and a replacement method for steel arch bridge suspenders. Background technique [0002] With the development of economy and society, more and more steel arch bridges, including concrete-filled steel tube arch bridges, are being built. The maintenance of steel arch bridge suspenders is an important issue in bridge operation management. Generally speaking, the existing bridge codes require that the design service life of the bridge is not less than 100 years, while the service life of the suspenders is usually less than 20 years. That is to say, the steel arch bridge with suspenders must meet the design requirements. The boom needs to be replaced at least 4 times. There are tens of thousands of steel arch bridges in our country, and the number of suspenders of these bridges needs to be replaced, so the construction task is very arduous. [0003] Most of the steel arc...

AI Technical Summary

Problems solved by technology

Generally speaking, the existing bridge codes require that the design service life of the bridge is not less than 100 years, while the service life of the suspenders is usually less than 20 years. That is to say, the steel arch bridge with suspenders must meet the design requirements. Boom needs to be replaced at least 4 times

[0010] The main characteristics of suspender replacement for single steel tube arch bridges (steel tube concrete arch bridges) and dumbbell-shaped cross-section steel tube arch bridges (steel tube concrete arch bridges) are that the vault is arc-shaped or elliptical, and it is difficult to install leveling devices on the vault. The hole is very difficult, and the bearing capacity of the arch rib is lowered by drilling. Therefore, method 1, method 2, and method 3 cannot be used without interrupting traffic; method 4 is difficult to ensure structural safety and reduce bridge deck deformation, and cannot be used. Adapt to the traffic situation on the bridge deck

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