Composite prestressed bar finished guy cable and manufacturing method thereof

Abstract

A composite prestressed tendon finished cable, including a composite prestressed tendon cable body composed of multiple single-strand steel strands and multiple cable wires, and two anchors at both ends of the cable body, each anchor includes an anchor Unit and sealing unit; the anchor unit includes end cap, taper sleeve, anchor plate, nut, anchor cup and restraint ring; there are multiple anchor holes on the anchor plate, and the center wire of each single strand end of the finished cable body A taper sleeve is installed, and the end of the center wire is processed into a heading head. The side wires are located outside the taper sleeve and distributed in a conical shape and form a single strand anchoring unit with the tapered anchor hole of the anchor plate. The cable wires are evenly distributed in the The outer circumference of the multi-strand single-strand steel strand passes through the anchor plate and is processed into a header at the end. The inside of the anchor cup is poured with epoxy filler. After the epoxy filler is cured, the multi-strand single-strand steel strand and multiple Anchoring of cable steel wire; the cable is prefabricated in the factory, sealed and anti-corrosion, and the breaking force of the cable can be precisely adjusted according to the structural requirements, economical and practical; construction, installation and tensioning are simple.

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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