Whole-bundle drawing device assembly for replacing hoisting rod and cleaning hole and steel wire and hole cleaning method for detaching old hoisting rod of arch bridge thereof

Abstract

The invention provides a whole-bundle drawing device assembly for replacing a hoisting rod and cleaning a hole. The whole-bundle drawing device assembly comprises a connector, a tool nut I, a high-strength screw rod, a supporting leg, a tensioning jack and a tool nut II; a steel wire and hole cleaning method for detaching an old hoisting rod of an arch bridge by adopting the device assembly comprises the following steps: firstly, drilling a bridge deck to an anchor head section of the old hoisting rod from top to bottom by utilizing a concrete core drilling machine; then, mounting the device assembly under the bridge deck and covering an upper end round hole of the connector onto an anchor plate of a steel wire anchor head to be drawn to be fixedly connected with the anchor plate through a welding manner; covering a lower end round hole of the connector onto one end of the high-strength screw rod through the tool nut I to be fixedly connected with the high-strength screw rod by adopting a thread connection manner; taking the supporting leg as a counter-force supporting frame of the tensioning jack and mounting the supporting leg on the bottom surface of a lower transverse beam of the bridge; taking the high-strength screw rod as a jack tensioning part and drawing the whole bundle of the steel wire of the old hoisting rod of the arch bridge or the anchor head of a steel strand by adopting the hydraulic tensioning jack; and finally, cleaning the hole. The method has the advantages of relatively short construction and working time, low cost, economical efficiency, safety and reliability, and convenience for standardized construction.

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 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 core the hig...

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

[0003] The invention patent application with the patent publication number CN104746442A discloses a steel wire and hole cleaning device assembly for replacing the old suspender of the suspender arch bridge and a method for dismantling the old suspender. Although the invention patent application has human It has the advantages of low work intensity, safety and reliability, and convenient standardized construction. However, the drawing steel wire and hole clearing device component of the patent application for this invention is a single drawing device. The method used is to draw steel wires one by one, and finally clean the hole. The intensity of manual work is relatively high, the construction time is relatively long, and the construction cost is relatively high

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