Manufacturing method of hot extrusion polyethylene zinc-aluminum alloy coating steel wire cable

Abstract

The invention relates to a manufacturing method of a hot extrusion polyethylene zinc-aluminum alloy coating steel wire cable. In accordance with the arrangement rule of steel wires at the cross section of the cable, the length of the cable is controlled through the center standard wire, zinc-aluminum alloy coating steel wires are bundled through the twisting angle being 2-4 degrees, a high-strength polyester belt is wound on the outside of the steel wire bundle, a double-layer high-density polyethylene protection layer is hot-extruded through the double-cavity co-extrusion one-time forming process, wind-rain induced vibration prevention embossing is arranged on the outer layer of the polyethylene protection layer according to the wind-rain induced vibration design requirement of the cable, and coiling down and storage are performed after the two ends of the cable are anchored. Finally, the cables are transported to the erection scene according to the delivery request, and erected one by one. The manufacturing process of the cable is free from site limits of construction sites, small in climate factor influence, convenient to control due to factory production management, and capable of meeting the use requirements for long length, high accuracy and durability of stay cables in super-large long-span bridges at the marine environment.

Description

technical field [0001] The invention belongs to the technical field of bridge cables, and in particular relates to a manufacturing method of hot-extruded polyethylene zinc-aluminum alloy coated steel wire cables. Background technique [0002] Cable-stayed bridge, also known as cable-stayed bridge, is a bridge in which the main girder is directly suspended on the tower column by cable-stayed cables. It is characterized by its light structure and strong applicability. It can change the combination of beams, cables and towers into different systems, which is suitable for different geological and terrain conditions. Due to the addition of the stay cables in the middle of the main girder, the bending moment is significantly reduced. Compared with other systems of long-span bridges, the amount of steel and concrete is relatively economical. With the help of the pre-tension force of the cable-stayed bridge, the internal force of the main girder can be adjusted to make it evenly an...

AI Technical Summary

Problems solved by technology

[0004] With the rapid development of modern bridges, a number of large-span sea-crossing bridges will be built soon. These bridges have the requirements of long cable length, high precision, and long design life, which cannot be met by using traditional galvanized steel wire cables. The service requirements for the durability of these ultra-long-span bridges in marine environments

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