A device for replacing a traction friction anchor hanger rod and a method for replacing the hanger rod of a steel pipe arch bridge

Abstract

A device for replacing traction friction anchoring suspenders, including fixed end anchors, tension end anchors, upper transfer beams, upper and lower steel strands and lower joists, and traction friction anchoring arches installed on arch bridge arches Top anchoring anti-slip system; the arch anchoring anti-slip system includes friction anchoring device Ⅰ composed of two sets of horse-riding upper and lower clamping devices I and two pull rods I and two sets of horse-riding upper and lower clamping devices II Friction anchoring device II composed of two pull rods II; the two ends of the traction cable are respectively anchored on the horse-riding upper clamping device I or the horse-riding upper clamping device II, and the traction jack is driven to pull the traction cable to realize the traction vault Anti-skid of friction anchoring anti-skid system; the four rotating spreaders for leveling are respectively located at the two ends of the two horse-riding upper clamping devices I and II, and the leveling of the spreaders is realized through self-adaptive rotation of the pin shaft; The device has less influence on the stress of the original structure during the cable force conversion process of the suspender replacement, is convenient for standardized construction, and has high work efficiency.

Description

technical field [0001] The invention relates to a bridge construction machine tool, in particular to a tool hanger device for replacing the hanger of a steel pipe truss concrete arch bridge and a method for replacing the hanger of a steel pipe arch bridge. Background technique [0002] At present, most of the suspension rod replacement devices of steel pipe concrete arch bridges are mainly temporary suspension rods or temporary hoisting devices. The upper part of the arch needs to be welded to fix the leveling wedge or anti-slip stop to achieve the leveling of the arch and facilitate the installation of beams. Or the purpose of anti-slip; when the temporary suspender or the temporary hoisting device needs to be transferred to the next suspender replacement place, the beam on the arch needs to be hoisted by large-scale lifting equipment. The disadvantages are: the engineering work is intensive and the welding quality is difficult to control , It is easy to damage the original...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the suspension rod replacement devices of steel pipe concrete arch bridges are mainly temporary suspension rods or temporary hoisting devices. The upper part of the arch needs to be welded to fix the leveling wedge or anti-slip stop to achieve the leveling of the arch and facilitate the installation of beams. Or the purpose of anti-slip; when the temporary suspender or the temporary hoisting device needs to be transferred to the next suspender replacement place, the beam on the arch needs to be hoisted by large-scale lifting equipment. The disadvantages are: the engineering work is intensive and the welding quality is difficult to control , it is easy to damage the original steel pipe concrete arch rib and coating, the wedge block cannot be used repeatedly, the progress of demolition and restoration work is slow, the consumption of large lifting equipment is large, and the construction cost is high

[0003] The application publication number is: CN 102926332 A, and the title of the invention is "tool hanger device and replacement method for steel arch bridge hanger replacement" which discloses a tool hanger device for steel arch bridge hanger replacement. It is necessary to weld the limit device near the position of the suspender at each place. It is difficult to control the welding quality on site, and it will damage the arch rib and coating of the original steel structure. The material of the limit device cannot be used for turnover. Partially welded positions are repaired; the number of wire ropes around the arch circle is large, the construction process is complex, the engineering work intensity is high, the progress of demolition and restoration work is slow, the consumption of large lifting equipment is large, and the construction cost is high

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