Chill-cast steel-stranded anchor cable

Abstract

A chill-cast steel-stranded anchor cable relates to a prestressed cable and comprises a finished cable body and a chill-cast anchor. The chill-cast anchor comprises a chill-cast anchor cup, an anchor plate, a seal cylinder and a seal device, wherein the anchor plate is mounted at an opening of the chill-cast anchor cup, the seal cylinder is connected to the bottom of the chill-cast anchor cup, and the seal device is mounted in the seal cylinder. The finished cable body is a steel-stranded finished cable body, steel strands at the bare-wire end of the cable body are positioned in anchor holes of the anchor plate, central wires of the steel strands pass through small tapered plugs in the anchor holes of the anchor plate and headed and fixed to the end faces of the small tapered plugs, and other steel wires are positioned around the small tapered plugs and scattered to form large tapered plugs. Other positions of the bare-wire end of the steel-stranded finished cable body are disposed in the chill-cast anchor cup and the seal cylinder, and chill casting material and anticorrosion material are filled among the other positions, the chill-cast anchor cup and the seal cylinder. The chill-cast steel-stranded anchor cable has the advantages of simplicity in manufacture, reliable anchorage, low manufacturing cost and wide application range, and is especially suitable for cable-stayed bridges, suspender arch bridges and suspension bridges.

Description

technical field [0001] The invention relates to a prestressed cable, in particular to a steel strand cold cast anchor cable. Background technique [0002] Cold-cast anchor cables are widely used in bridge construction, especially in the application of cable-stayed bridges, suspension rod arch bridges and suspension bridges. The cable bodies currently used in cold-cast anchors are generally composed of 19 to 471 cables with a diameter of ￠5 or ￠7mm The finished cable bodies of various specifications composed of high-strength steel wires are also called parallel steel wire cables in the industry. The parallel steel wire cables and cold-cast anchor anchors form a complete set of parallel steel wire cold-cast anchor cables and are used as the stressed parts of the bridge. The production of the parallel steel wire cold cast anchor cable is to pass the steel wire of the corresponding specification and quantity through the wire dividing plate, then the steel wire is headed, and the...

AI Technical Summary

Problems solved by technology

This kind of parallel steel wire cold-cast anchor cable is widely used at present, but the steel wire with strength of 1670Mpa and 1770Mpa is widely used in this type of cable at present, and its strength is relatively low, and the manufacturing process of cold-cast anchor is relatively complicated. When assembling, each steel wire must pass through the wire distribution plate, and the position cannot be misplaced. The larger cold cast anchor has more than 400 steel wires, and it takes a lot of time to pass through the wire distribution plate. It is also very time-consuming and labor-intensive to carry out steel wire heading after the wire plate

[0003] The steel strand cable is different. The strength of the steel strand is relatively high. The 1860Mpa steel strand with φ15.2 is more widely used. Now the 1960Mpa steel strand is gradually being promoted. The steel strand cable currently only has the overall Extruded anchor cables, hot-cast anchor cables, and other types of steel strand cables must be used with clips. Clip-type anchor cables generally cannot be assembled in the factory and need to be installed on site. And tensioning, the construction period is relatively long, and the size of the clip-type steel strand cables is relatively large, so many bridges cannot be used, especially the hanger arch bridge, which hardly uses clip-type steel strand cables

There is also a hot-cast anchor steel strand cable, which can be made in the factory, but the manufacturing process is more complicated than the cold-cast anchor cable. The hot casting body used is copper-zinc alloy, which is very expensive. The production cost of cable is also high

At present, the integral extruded anchor cable that can meet the use requirements is sometimes not used due to different design reasons and specific use requirements, and the integral extruded anchor cable is complicated to manufacture. After the anchor head is extruded, it needs to be combined with The thread of the anchor head is processed together with the cable. Even if the cable is 200 meters long, it cannot be removed for processing when processing the thread, and the cost is relatively high.

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