Steel strand finished stay cable and manufacturing method thereof

Abstract

A steel strand finished stay cable comprises a cable body and two anchoring parts, wherein the cable body consists of a plurality of single-stranded steel strands and an outer sheath, and the two anchoring parts are arranged at two ends of the cable body. Each anchoring part comprises an anchoring unit and a sealing unit, the anchoring unit comprises an end cap, a taper sleeve, an anchoring plate, an anchoring cup and a restraint ring, wherein the anchoring plate is provided with a conical anchor hole, and the structure of each single-stranded steel strand of the finished stay cable in the conical anchor hole includes: the taper sleeve is mounted on a central wire of one end of the single-stranded steel strand, the end of the central wire is headed, side wires are arranged outside the taper sleeve and dispersedly conically distributed and form a single-stranded steel strand anchoring unit with the conical anchoring hole of the anchoring plate, the end of the anchoring cup is capped with the end cap, epoxy packing is poured into the anchoring cup and anchoring of the multiple single-stranded steel strands can be completed after curing of the epoxy packing. The steel strand finished stay cable is fine in sealing and corrosion resistance and simple in construction, mounting and staying and is preformed in factories, and large-tonnage multi-stranded steel strand finished stay cables in various specifications can be manufactured according to needs, and are applicable to bridge construction and large-scale construction engineering.

Description

technical field [0001] The invention relates to a cable used in bridge construction and large-scale construction projects, in particular to a finished cable composed of large-tonnage multi-strand (root) steel strands and a preparation method thereof. Background technique [0002] In recent years, the types of cables used in domestic bridges and large buildings mainly include: cold cast anchor wire cables, hot cast anchor wire cables, clip anchor steel strand cables and steel strand whole bundle extruded finished cables search. Among them, compared with steel wire cables, steel strand cables have their own advantages and disadvantages. Steel strand cables have greater advantages than steel wire cables in terms of tensile strength and anti-corrosion performance. More and more It is used in various projects; the following are the following deficiencies in the existing form of cables: [0003] 1. The strength of the steel wire used in the cold cast anchor and hot cast anchor c...

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Problems solved by technology

[0004] 2. The cable bodies of cold cast anchors and hot cast anchors are parallel steel wire bundles, and the steel wires and anchor cups are heated and solidified by epoxy iron sand to form a whole (see Figure 7 , Figure 8 ), the sheath with better sealing and anti-corrosion properties outside the cable, but because there is no spacer between the steel wires of the steel wire bundle, if the outer sheath is damaged and some steel wires are corroded, it is easy to extend to the corrosion of the entire steel wire bundle section

If a broken wire occurs, the whole bundle usually breaks suddenly, which will cause great damage to the bridge, serious consequences and difficult repair

[0005] 3. Clip-type steel strand group anchor cable (see patent ZL92108579.6), usually cut, install and stretch each steel strand at the construction site. The overall cable force adjustment of the cable, the construction steps are cumbersome, and the quality control requirements for the construction process are very high

[0007] 5. The anchor heads at both ends of the clip-type steel strand group anchor cable need to be tensioned before the anti-corrosion treatment is completed, and the anti-corrosion work is more difficult

[0008] 6. The steel strand extruded cable is limited by the tooling and equipment required for anchor head processing. At present, the maximum processing capacity is 37 steel strands for the finished cable

[0009] 7. The thread of the thread of the anchor head can only be processed after the extrusion of the anchor head and the preparation of the whole cable have been completed for the whole bundle of steel strand extruded cables. Therefore, the thread processing requires high equipment and is difficult to process. Longer production cycle

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