Composite prestressed bar finished guy cable and manufacturing method thereof

Abstract

The invention relates to a composite prestressed bar finished guy cable. The guy cable comprises a composite prestressed bar cable body consisting of a plurality of single-stranded steel stranded wires and a plurality of guy cable steel wires, and two anchoring pieces positioned at the two ends of the cable body, wherein each anchoring piece comprises an anchoring unit and a sealing unit; the anchoring unit comprises an end cover, a conical sleeve, an anchor plate, a nut, an anchor cup and a restraining ring; a plurality of anchor holes are formed in the anchor plate; the conical sleeve is arranged on a central wire at the end of each single-stranded steel stranded wire of the cable body of the finished guy cable; the end of the central wire is provided with an upset head; side wires are positioned on the outer side of the conical sleeve and conically distributed in a scattered mode; the side wires and the conical anchor holes of the anchor plate form the single-stranded steel stranded wire anchoring unit; the guy cable steel wires are uniformly distributed at the peripheries of the single-stranded steel stranded wires and penetrate through the anchor plate; the ends of the guy cable steel wires are provided with upset heads; an epoxy filler is poured into the anchor cup; and the single-stranded steel stranded wires and the guy cable steel wires are anchored after the epoxy filler is cured. The guy cable is prefabricated in a factory, has high sealing performance and corrosion resistance, is economic and practical, and is easy to construct, install and tension, and the breaking force of the guy cable can be accurately adjusted according to a structural requirement.

Description

technical field [0001] The invention relates to a cable used in bridge construction and large-scale construction projects, in particular to a composite prestressed tendon finished cable 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 existing forms of cables have the following shortcomings: [0003] 1. The strength of the steel wire used in the cold cast anchor and hot cast anchor cable is ≥1670MPa. In comparison, the strength ...

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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 ), 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

[0006]4. Clip-type steel strand group anchor cable (see patent ZL92108579.6), usually cut, install and tension the steel strand at the construction site After each steel strand is stretched, the overall cable force needs to be adjusted. The construction steps are cumbersome, and the quality control requirements for the construction process are very high.

[0008]6. 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 difficult

[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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