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Repairing method of protective outer sleeve

A repair method and technology of outer casing, which are applied in bridge maintenance, erection/assembly of bridges, bridge reinforcement, etc., can solve the problems of reducing the service life of HDPE pipes and cracking, and achieve the effect of avoiding scrap treatment and saving costs.

Pending Publication Date: 2019-12-27
ROAD & BRIDGE SOUTH CHINA EINGINEERING CO LTD
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  • Abstract
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Problems solved by technology

[0003] The cable body of the cable is formed in a stress-free state. When the cable body is working, the sheath is always in a high-stress state with the elongation of the steel wire. It still has alternating tensile stress in many working conditions, so , when the outside of the HDPE pipe is damaged, the damaged part of the HDPE pipe will easily crack under stress, which greatly reduces the service life of the HDPE pipe. Therefore, it is very important to repair the damaged part of the HFPE pipe. important

Method used

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  • Repairing method of protective outer sleeve

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Embodiment Construction

[0025] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are only used to explain the present invention, and cannot be construed as limiting the present invention.

[0026] Those skilled in the art can understand that, unless specifically stated otherwise, the wording "including" used in the specification of the present invention refers to the presence of the described features, integers, steps, operations, parts / components and / or components, but does not exclude the presence or Add one or more other features, integers, steps, operations, parts / components, components, and / or groups of them. It should be understood that when we say that a zero / component is “connect...

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Abstract

The invention provides a repairing method for a protective outer sleeve. The repairing method comprises the following steps of polishing a scratched part of the protective outer sleeve; abutting a discharging opening of a hot melting welding gun against the interior of the scratch, and extruding the molten repairing filler in the scratch; and after the molten repairing filler is cooled and solidified, rubbing down the solidified repairing filler in the scratch of the protective outer sleeve. According to the repairing method of the protective outer sleeve, after the protective outer sleeve isscratched and then repaired, the performance index of the protective outer sleeve is not greatly affected, and it can be guaranteed that the protective outer sleeve provides good protection for a staycable, and therefore the situation that the protective outer sleeve needs to be scrapped is avoided, and the cost is saved.

Description

Technical field [0001] The invention relates to the technical field of bridge construction, in particular to a method for repairing a protective outer sleeve. Background technique [0002] In cable-stayed bridges, HDPE pipes are used as protective sleeves for stay-cable cables. Its purpose is to isolate the stay-cable steel wires from the atmosphere and prevent electrochemical reactions on the surface of the stay-cable steel wires. [0003] The cable body of the stay cable is formed in a stress-free state. When the cable body is working, the sheath is always in a high stress state with the elongation of the steel wire. There are also alternating tensile stresses under many working conditions, so When the outside of the HDPE pipe is damaged, the damaged part of the HDPE pipe will easily crack under the action of stress, which greatly reduces the service life of the HDPE pipe. Therefore, it is very important to repair the damaged part of the HFPE pipe. important. Summary of the inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00
CPCE01D22/00
Inventor 吴建峰夏江南李鸿文刁先觉刘怀刚王海伟肖向荣陈杨唐代新高世强陈振宇陈勇丰韩春鹏
Owner ROAD & BRIDGE SOUTH CHINA EINGINEERING CO LTD
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