Method for enwinding spiral reinforcement on outer surface of stay cable after being winded with PVF fluoride membrane adhesive tape

Abstract

The invention relates to a method for winding a spiral bar after the outer surface of a diagonal rope body is wound with a PVF fluorating film adhesive tape. The invention is characterized in that: the method has the technique steps as follows: the steel tendon of the diagonal rope is carried out hot extrusion high density polyethylene and then is wound and covered with a layer of PVF fluorating film protection adhesive tape in a spiral way, finally, the PVF adhesive tape is externally wound with the spiral bar. By adopting the method after being wound with the PVF fluorating film adhesive tape, the outer surface of the diagonal rope body is wound with the spiral bar, the invention not only exerts the excellent weatherability of the PVF adhesive tape, ensures the durability of the diagonal rope, but also at the same time makes use of the hydrophobic nature of the surface of the PVF adhesive tape and the wound spiral bar to well restrain the shock excitation of the diagonal rope for resisting wind and rain.

Description

technical field [0001] The invention relates to a method for wrapping a PVF fluoride film tape on the outer surface of a cable-stayed cable and then wrapping a spiral rib. It belongs to the technical field of bridge cables. Background technique [0002] Usually, the anti-corrosion of stay cables is mainly protected by high-density polyethylene sheaths. At the same time, in order to solve the wind and rain-induced vibration of stay cables, aerodynamic measures such as embossing or winding spiral ribs are further adopted on the surface, as shown in Figure 1. However, in the past on many cable-stayed bridges, the high-density polyethylene sheaths of cable-stayed cables have cracked and damaged to varying degrees after being used for less than a few years. In order to further improve the anti-corrosion performance of cable-stayed cables, there are currently improvements The following two methods: [0003] 1. Wrap the parallel steel wire bundles with PVF fluorinated film tape b...

AI Technical Summary

Problems solved by technology

[0006] The first method, although it can provide another layer of protection after the high-density polyethylene sheath is damaged, it fails to improve the aging resistance of high-density polyethylene. At present, the aging resistance of high-density polyethylene has always been a durabl

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