Steel wire drawing and hole cleaning device assembly for replacing old lifting rod of arched bridge pre-stressed boom and method for dismounting old lifting rod

Abstract

The invention provides a steel wire drawing and hole cleaning device assembly for replacing an old lifting rod of an arched bridge pre-stressed boom. The assembly comprises a working steel strand, a stretching jack, an upper connector, a connecting rod, a lower connector, an upper supporting foot and a lower supporting foot, which are sequentially connected. A method for dismounting the old lifting rod is that a hydraulic stretching jack wire drawing mode is adopted; steel wire or the steel strand of the old lifting rod of the arched bridge pre-stressed boom is drawn out and then a hole is cleaned; when in the working state, the lower end of the lower connector is connected with the steel wire to be draw and while the upper end of the lower connector is respectively connected with the connecting rod, the upper connector and the working steel strand; the upper end of the upper connector is connected to the working steel strand by a clamping plate anchoring manner; the upper connector and the lower connector are connected with the connecting rod by a thread manner; the lower supporting foot is mounted on the bridge surface; the upper supporting foot used as a reactive supporting frame of the stretching jack is mounted on the lower supporting foot; the stretching jack is driven to stretch the working steel strand so as to achieve single wire drawing. The method and the method are applicable to replacement of the old lifting rods of all arched bridges; the original structure of the bridge cannot be damaged, and standard mechanical construction can be conveniently carried out.

Description

technical field [0001] The invention relates to a bridge construction device and a method thereof, in particular to a steel wire drawing and hole cleaning device assembly for replacing an old suspender of a suspender arch bridge and a method for removing the old suspender. Background technique [0002] Since most suspender anti-corrosion processes in the past used high-strength cement slurry to outsource anti-corrosion, the removal of the old suspender in the suspender replacement project required cleaning of the cable guide hole. At present, the hole cleaning treatment mainly adopts chisel removal method and drilling coring method. Chiseling method, using pneumatic picks or pneumatic drills to chisel away the high-strength cement slurry in the cable guide, and remove the old suspender steel wires to achieve the purpose of hole cleaning. The cable conduit gap cannot be pulled out, which affects the work progress; the drilling core method uses a hollow drill to drill and c...

AI Technical Summary

Problems solved by technology

Chiseling method, using pneumatic picks or pneumatic drills to chisel away the high-strength cement slurry in the cable guide, and remove the old suspender steel wires to achieve the purpose of hole cleaning. The cable conduit gap cannot be pulled out, which affects the work progress; the drilling core method uses a hollow drill to drill and core the high-strength cement slurry and steel wire or steel strand in the cable conduit to achieve the purpose of hole cleaning; the disadvantage is: hollow drill It is easy to get stuck in the gap between the steel wire and the cable guide, and cannot be pulled out, which affects the progress of the work; at the same time, the hollow drill needs to grind the steel wire, resulting in a large loss rate of the drilling machine, low work efficiency and high cost

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