Bridge sling wire sealing protection structure and protection method

A technology for steel wire slings and protective structures, applied in bridges, bridge parts, bridge construction, etc., can solve the problems of reduced anti-corrosion performance, low strength of the protective layer, and cracks in the protective layer, so as to save maintenance costs and improve compatibility , the effect of preventing steel wire corrosion

Inactive Publication Date: 2010-05-19
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction of the structure is complicated, and the strength of the protective layer is small. Under the alternating action of temperature and stress and natural aging, the protective layer may crack, resulting in a decrease in anti-corrosion performance.

Method used

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  • Bridge sling wire sealing protection structure and protection method
  • Bridge sling wire sealing protection structure and protection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) The surface of the polyethylene sheath 2 or the sling 1 (bare part) of the steel wire rope sling of the present invention is routinely cleaned, after removing the rust and dirt on the surface, the outer surface is scraped and coated with a layer of elastic room temperature vulcanized polysulfide sealant (HM106 produced by Beijing Aeronautical Materials Research Institute of China Aviation Industry Corporation), the scraping thickness of the sealant is 1500μm;

[0022] 2) After scraping the room temperature vulcanizing sealant, before the sealant is vulcanized, wrap a neutral plain glass cloth with a thickness of 0.2mm. The glass cloth is wound by 50% overlap, and the thickness of the glass cloth after winding is 500 μm;

[0023] 3) Brush the room temperature vulcanized polysulfide sealant on the outside of the neutral plain glass cloth again. The sealant is first diluted with ethyl acetate, and the dilution concentration is 70%. The thickness of the brushed sealant ...

Embodiment 2

[0026] 1) routine cleaning is carried out to the surface of the polyethylene sheath 2 of the steel wire rope sling or the sling 1 (bare part), after removing the rust and dirt on the surface, the outer surface is scraped and coated with a layer of elastic room temperature vulcanized polyurethane sealant ( The polyurethane sealant of GF-3-Z9 produced by Shanxi Provincial Institute of Chemical Industry), the scraping thickness of the sealant is 2000 μm;

[0027] 2) After scraping the room temperature vulcanizing sealant, before the sealant is vulcanized, wrap a neutral plain glass cloth with a thickness of 0.15mm. The glass cloth is wound by 50% overlap, and the thickness of the glass cloth after winding is 1000μm;

[0028] 3) Scrape again the room temperature vulcanized polyurethane sealant outside the neutral plain glass cloth, the thickness of the sealant is 2000μm;

[0029] 4) After the room temperature vulcanization polysulfide sealant is vulcanized, brush the acrylic poly...

Embodiment 3

[0031] 1) The surface of the polyethylene sheath 2 or the sling 1 (bare part) of the steel wire rope sling of the present invention is routinely cleaned, after removing the rust and dirt on the surface, the outer surface is scraped and coated with a layer of elastic room temperature vulcanized silicone sealant (HM304 produced by Beijing Aeronautical Materials Research Institute of China Aviation Industry Corporation), the scraping thickness of the sealant is 1000 μm;

[0032] 2) After scraping the room temperature vulcanizing sealant, before the sealant is vulcanized, wrap a neutral plain glass cloth with a thickness of 0.2mm. The glass cloth is wound by 50% overlap, and the thickness of the chemical fiber cloth after winding is 2000μm;

[0033] 3) Scratch-coat room temperature vulcanized silicone sealant on the outside of the neutral plain glass cloth again, and the thickness of the sealant to be scraped is 500 μm;

[0034] 4) After the room temperature vulcanization polysul...

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Abstract

The invention belongs to the protection technology, in particular to a bridge sling wire sealing protection structure and protection method of the sling of the suspension bridge and the diagonal sling of the cable-stayed bridge. The bridge sling wire comprises parallel galvanized bundles of steel wires and a layer of polyethylene jacket, wherein the peripheral surface of the polyethylene jacket is provided with a room temperature vulcanization elastic sealant layer, a neutral plain glass cloth layer, an elastic sealant layer and a protective finish paint layer in turn. The invention adopts the room temperature vulcanization elastic sealant layer and the neutral plain glass cloth to cover the entire polyethylene jacketed parallel bridge sling wire so that the external moisture and harmful material can not invade and the steel wire can be still in the anerobic condition so as to effectively prevent the corrosion of the steel wire. The protection method and protection structure used for realizing same of the invention are applicable to the maintenance project of the existing sling which is only protected by the polyethylene jacket.

Description

technical field [0001] The invention belongs to the protective technology, and relates to a method for protecting suspension bridge suspension cables and cable-stayed cables of cable-stayed bridges and a suspension cable protection structure obtained by the method. The suspension cable system includes a suspension cable composed of multiple high-strength steel wire bundles and outer polyethylene sheath. Background technique [0002] The suspension cables of modern suspension bridges and cable-stayed bridges are the key components of suspension bridges and cable-stayed bridges. Corrosion of wires is critical to prolonging sling life. [0003] No. JP11081231 Japanese patent publication discloses a method for cable protection of suspension bridges. The method is to cover the cable surface with polyethylene tape or thermosetting polyethylene plate, preferably with S-shaped steel wire tightly wound to form a barrier layer, and then The sleeve is installed on the surface of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/16D07B7/14
Inventor 周军辉蔺艳琴刘若愚谭华青郑长红严煜焕李玉林刘嘉李利
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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