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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

A hole cleaning device and hanger technology, which is applied in bridges, bridge maintenance, bridge reinforcement, etc., can solve the problems of being easily stuck in the gap between steel wires and cable guides, high manual work intensity, and high cost, so as to facilitate standardized construction and manpower The effect of low work intensity and fast progress

Active Publication Date: 2015-07-01
LIUZHOU OVM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • 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
  • 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

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Experimental program
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Effect test

Embodiment 1

[0022] A steel wire drawing and hole cleaning device assembly for replacing the old suspender of a suspender arch bridge, such as figure 1 As shown, the device assembly includes a working steel strand 1, a tension jack 2, an upper leg 3, a lower leg 4, an upper connector 5, a connecting rod 6 and a lower connector 7 connected in sequence;

[0023] In use state: the lower end of the lower connector 7 is connected to the steel wire 8 to be drawn, and the upper end is respectively connected to the connecting rod 6, the upper connector 5, and the working steel strand 1 in turn, and the upper end of the upper connector is connected to the working steel strand 1 by clip anchoring , the lower end of the upper connector is connected to the upper end of the connecting rod 6 in a threaded manner; the lower end of the lower connector 7 is connected to the drawing steel wire 8 to be replaced by a pier head anchoring method, and the upper end of the lower connector 7 is connected to the l...

Embodiment 2

[0026] A method for extracting steel wires and clearing holes for dismantling old suspenders of arch bridges, which uses the steel wire drawing and hole cleaning device assembly for replacing the old suspenders of suspenders arch bridges described in Embodiment 1 to remove the old suspenders of arch bridges The method of drawing steel wires and clearing holes, that is: using the device components to use hydraulic tension jacks to draw wires, and then single-drawing the steel wires or steel strands of the old suspenders of the arch bridge and then clearing the holes. The specific method and steps are as follows: :

[0027] A. The driving force is provided by the hydraulic tensioning jack, and the working steel strand is used as the tensioning part of the jack; the connection mode between the working steel strand and the steel wire to be pulled out of the old suspender of the arch bridge is upper connector + connecting rod + lower connection device;

[0028] B. The upper end of...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00E01D24/00
Inventor 窦勇芝韦福堂黎祖金
Owner LIUZHOU OVM ENG
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