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Anchoring material and pouring anchoring method for ultra-high strength large-diameter steel wire main cable strand

An ultra-high-strength, anchoring material technology, used in bridge parts, bridges, buildings, etc., can solve the problems of insufficient compactness, limited temperature increase, large casting shrinkage holes, etc. With size and energy saving effect

Active Publication Date: 2018-09-18
JIANGSU FASTEN STEEL CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

), before the molten alloy flows to the lower part of the steel wire and infiltrates into the tiny gaps between the steel wires, the liquid alloy will quickly solidify into a solid, resulting in an effective grip between the steel wire bundle and the alloy The length is reduced, and the compactness cannot meet the requirements
If the method of increasing the casting temperature of the alloy melt is used to increase the fluidity of the melt, the temperature increase is limited and larger shrinkage holes will be generated due to the increase in temperature, and too high a temperature will affect the relevant properties of high-strength steel wire , it is difficult to implement

Method used

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  • Anchoring material and pouring anchoring method for ultra-high strength large-diameter steel wire main cable strand
  • Anchoring material and pouring anchoring method for ultra-high strength large-diameter steel wire main cable strand
  • Anchoring material and pouring anchoring method for ultra-high strength large-diameter steel wire main cable strand

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] This embodiment relates to an anchoring material, used for anchoring the end of an ultra-high-strength large-diameter steel wire main cable strand of 6mm-2060MPa or more. Its chemical composition is Al 3.5%, Cu 1.8%, and Mg 0.002% by mass percentage. The rare earth element is 0.005%, and the casting temperature is controlled within the range of 440℃ to 460℃. The rare earth element is selected from La and Ce.

[0050] The method for grouting and anchoring the main cable strands of ultra-high-strength and large-diameter steel wires includes the following steps

[0051] (1) Put the alloy ingots smelted according to the formula into a heating furnace to melt to form an alloy melt: According to the theoretical calculation, the Zn-Cu2%, Zn-Al10%, Zn-Al15%, Zn-Al30% alloy ingots are in a certain proportion Match, put into the heating furnace, heat and melt and stir fully; Mg and rare earth elements are Zn-Al10%-Mg-rare earth, Zn-Al15%-Mg-rare earth, Zn-Al30%- according to the flui...

Embodiment 2

[0059] This embodiment relates to an anchoring material used for anchoring the ends of ultra-high-strength large-diameter steel wire main cable strands of 60mm-2060MPa or more. Its chemical composition is Al 0.4%, Cu 2.0%, and rare earth elements 0.08% by mass percentage. , The rest is zinc, its casting temperature: 445℃ to 465℃, rare earth elements are selected from La and Ce.

[0060] The method for grouting and anchoring the main cable strands of ultra-high-strength and large-diameter steel wires includes the following steps

[0061] (1) Put the alloy ingots smelted according to the formula into a heating furnace to melt to form an alloy melt: According to the theoretical calculation, the Zn-Cu2%, Zn-Al10%, Zn-Al15%, Zn-Al30% alloy ingots are in a certain proportion Match, put into the heating furnace, heat to melt and stir fully; the rare earth elements are selected in the form of Zn-Al10%-rare earth, Zn-Al15%-rare earth, Zn-Al30%-rare earth alloy ingots according to the fluidi...

Embodiment 3

[0069] This embodiment relates to an anchoring material, used for anchoring the end of an ultra-high-strength large-diameter steel wire main cable strand of 100mm-2060MPa or more. Its chemical composition is Al 5.5%, Cu 1.4%, and Mg 0.005% by mass percentage. Bi is 0.001%, the rest is zinc, and its casting temperature: 430℃ to 450℃.

[0070] The method for grouting and anchoring the main cable strands of ultra-high-strength and large-diameter steel wires includes the following steps

[0071] (1) Put the alloy ingots smelted according to the formula into a heating furnace to melt to form an alloy melt: According to the theoretical calculation, the Zn-Cu2%, Zn-Al10%, Zn-Al15%, Zn-Al30% alloy ingots are in a certain proportion Match, put into the heating furnace, heat to melt and stir fully; Mg is selectively added in the form of Zn-Al10%-Mg, Zn-Al15%-Mg, Zn-Al30%-Mg alloy ingots; Bi is Zn-Al10%- Bi, Zn-Al15%-Bi, Zn-Al30%-Bi alloy ingots are selectively added; after stirring, measure...

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Abstract

The invention relates to an anchoring material and pouring anchoring method for an ultra-high strength large-diameter steel wire main cable strand. The pouring anchoring compactness reaches 95% or above and is increased by 3% compared with the compactness of traditional hot cast anchors. After pressing with an anchor, the retracting value of an alloy casting is not larger than 5 mm, the depth of alloy poured into a steel wire bundle can reach third fourths of a conic section of the anchor after the casting is dissected, and no shrinkage cavity is formed in the casting. According to chemical components of the anchoring material, aluminum, zinc and copper are used as an alloy base, and Mg and rare earth elements are further added, so that the anchoring material has good fluidity, pouring anchoring efficiency reaches 100%, the bonding length of steel wires is improved, and favorable conditions are provided for reducing the anchoring length of the high strength large-diameter steel wire cable strand and reducing the size of the anchor.

Description

Technical field [0001] The invention relates to grouting anchors of steel wire main cable strands, in particular to an anchor tank material and an anchor tank method for ultra-high-strength steel wire rope strands. Background technique [0002] The main cable strand is the main stress structure of the suspension bridge, and the steel wire is the basic stress component of the main cable strand. If the suspension bridge adopts 127-￠6mm-2060MPa large-diameter high-strength steel wire main cable strands, it has the following advantages: 1) Reduce the number of strands, reduce the space used for anchoring, and reduce the scale of anchorage; 2) Reduce the amount of wire and air Counting the contact area improves the corrosion resistance of the main cable itself; 3) The overall volume ratio of the zinc-aluminum alloy coating or the zinc coating to the smooth steel wire in the main cable is reduced by about 60%, which reduces the zinc-aluminum alloy and pure zinc creep The influence of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C18/04C22C18/02C22C1/03E01D19/16
CPCC22C1/03C22C18/02C22C18/04E01D19/16
Inventor 薛花娟赵军陈伟乐宋神友吴玲正强强吴琼刘健
Owner JIANGSU FASTEN STEEL CABLE CO LTD