Arch bridge suspender convenient to replace and method for replacing the same

Abstract

A conveniently replaceable arch bridge suspender assembly, including a steel tie rod assembly, cable anchors and a support frame, the support frame has a tubular column structure, its cross section is circular or polygonal, and the central through hole of the support frame It can allow the cable body to pass through; the cable anchor is composed of the cable body and the anchor heads located at both ends of the cable body, one end is a prefabricated anchor head, and the other end is an on-site anchor head; in the working state, the support One end of the frame is fixed on a bridge structure, the prefabricated anchor head of the cable anchor is on the other end of the support frame, the field-installed anchor head end of the cable anchor is connected with one end of the steel tie rod assembly, and the other end of the steel tie rod assembly is fixed On another bridge structure; said bridge structure being a sub-beam or a bridge rib. The arch bridge suspender assembly is especially suitable for replacing old suspenders of arch bridges with relatively small inner diameters of embedded pipes. The method for replacing the suspenders enables the replacement construction of the suspenders to achieve the effect of not destroying the original structure of the bridge and being easy to install.

Description

technical field [0001] The invention relates to a bridge component, in particular to an arch bridge hanger assembly. Background technique [0002] According to the relevant design codes of highway bridges and culverts in our country, the reference service life of highway bridge and culvert design is 100 years, while for most arch bridges, the service life of the hanger cable system is mostly less than 20 years. Therefore, during the service life of the arch bridge, it is necessary to replace the hanger cables many times. Due to the lack of anti-corrosion and fatigue resistance in the structure of the early arch bridge suspenders, with the advancement of technology, the suspenders of the old structure will be replaced by new suspenders with better performance. Compared with the new type of suspenders, the inner diameters of the pre-embedded pipes matched with the early arch bridge suspenders are usually smaller, and some are even so small that only the cables can pass throug...

AI Technical Summary

Problems solved by technology

Compared with the new type of suspenders, the inner diameters of the pre-embedded pipes matched with the early arch bridge suspenders are usually smaller, and some are even so small that only the cables can pass through. Therefore, when replacing the suspenders of this type of arch bridge , the anchor heads at both ends of the boom often have the problem that they cannot pass through the embedded pipe

The common way to solve the small inner diameter of the embedded pipe is to ream the original embedded channel. For the concrete structure of the bridge, the reaming will inevitably cause damage to the adjacent parts of the channel or even destroy the stress ribs in the structure, thereby weakening the The strength of the structure will reduce the performance of the structure, leaving hidden dangers for the operation of the bridge in the future; if the steel structure of the bridge is reamed, the old pipe must be removed and replaced with a new large-diameter pipe, which will also damage the original structure At the same time, the new pipe and the old component need to be connected by welding, and the high temperature generated during the welding process will also cause certain damage to the old structure

Images