A whole bundle of jacking steel wires and hole cleaning method for demolishing old suspenders of arch bridges

Abstract

A full-bundle ejecting-drawing assembly for hanging rod replacement hole cleaning comprises a U-shaped hoop, a shoulder pole steel beam, flat jacks and steel cushion blocks which are installed in sequence, wherein in a usage state, the U-shaped hoop is fixedly connected with a steel wire anchor head to be ejected and drawn in a welding mode, the shoulder pole steel beam is installed between the steel wire anchor head to be ejected and drawn and the bottom of the U-shaped hoop, and two flat jacks are respectively installed between the top surfaces of two ends of the shoulder pole steel beam and the bottom surfaces of a hanging rod cross beam. The steel cushion blocks serving as flat jack height adjusting cushion blocks are installed between the bottom surface of the hanging rod cross beam and the tops of the flat jacks and drives the flat jacks to reversely eject the shoulder pole steel beam and the U-shaped hoop so as to achieve full-bundle ejection and drawing. By using the device and a method for dismounting an old hanging rod, arch bridge oil hanging rod dismounting can be performed under limited operating height (for example, spanning an existing railway line), the manual operating strength is low, the working efficiency is high, the full-bundle ejecting-drawing assembly is safe and reliable, the construction operation time is relatively short, and the construction cost is relatively economical.

Description

technical field [0001] The invention relates to a bridge construction device and a method thereof, in particular to a jacking device assembly used for replacing and clearing holes of a suspension rod under a limited working height and a method for removing the old suspension rod of an arch bridge. Background technique [0002] In the past, most of the hanger anti-corrosion processes used high-strength cement slurry to be outsourced for anti-corrosion, so the removal of the old hanger in the hanger replacement project requires the hole cleaning of the cable guide. ; Chiseling method, using air picks or air drills to chisel the high-strength cement slurry in the cable conduit, and remove the old boom wire to achieve the purpose of hole cleaning. There is a gap with the cable guide, which cannot be pulled out, thus affecting the operation 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 th...

AI Technical Summary

Problems solved by technology

[0002] Since most suspender anticorrosion processes in the past used high-strength cement slurry to outsource anticorrosion, the removal of the old suspender in the suspender replacement project required cable conduit hole cleaning; at present, the hole cleaning mainly adopts chisel removal method and drilling core method ; Chisel removal method, using pneumatic pick or pneumatic drill to chisel off the high-strength cement slurry in the cable conduit, and remove the old suspender steel wire to achieve the purpose of hole cleaning. The disadvantages are: high manual work intensity, large dust, and the pneumatic pick or pneumatic drill is easy to get stuck on the steel wire The gap with the cable guide cannot be pulled out, which affects the progress of the work; the drilling and coring method uses a hollow drill to drill and core the high-strength cement slurry and steel wire or steel strand in the cable guide to achieve the purpose of clearing the hole; the disadvantage is: hollow The drill is easily stuck in the gap between the steel wire and the cable guide, and cannot be pulled out, which affects the progress of the operation; 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

However, it has been found in practice that this patented technology also has the following disadvantages: 1. Because its hole cleaning device is a single extraction device, the steel wires are pulled out one by one, and finally the holes are cleaned, which requires a large working space, and the working height is relatively large. The replacement of booms under limited conditions is not applicable; 2. Compared with the above-mentioned existing technologies, the intensity of manual work has been reduced, but it is still high, the construction time is relatively long, and the construction cost is relatively high

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