Sealing structure of inhaul cable embedded pipe opening and method for sealing structure to reliably seal inhaul cable embedded pipe opening

Abstract

The invention discloses a sealing structure of an inhaul cable embedded pipe opening. The sealing structure comprises a waterproof shield installed in the inhaul cable embedded pipe opening and a steel embracing ring which is located inside the waterproof shield and arranged outside an inhaul cable body in a sleeving mode, the inside of the steel embracing ring is filled with sealing glue and thesteel embracing ring is pre-tightened through bolt components or steel embracing hoops, so that the steel embracing ring and the cable body are integrally connected, and the gap between the steel embracing ring and the waterproof shield is filled with silicon structural adhesive; several element rests are further arranged inside the steel embracing ring; the steel embracing ring is of a halved type, and two halves of the steel embracing ring are connected into an integral circle through several steel embracing hoops which are arranged at the outer ring or through the bolt components; the steelembracing ring can also be of a unilateral-opened type, and the two sides are connected into an integral circle through the bolt components. The sealing structure of the inhaul cable embedded pipe opening is provided with a dual-sealing structure, and has a reliable sealing effect and a better corrosion-prevention effect; the method for the sealing structure to reliably seal the inhaul cable embedded pipe opening is simple and easy to operate, and is particularly applicable to a steel sealing structure made of an iron steel material, and the full-sealing performance of the inhaul cable embedded pipe opening is achieved.

Description

technical field [0001] The invention relates to a cable sealing structure and a sealing method thereof, in particular to a sealing structure of a cable pre-embedded nozzle and a method for realizing reliable sealing of the cable pre-embedded nozzle. Background technique [0002] At present, the sealing of the anchorage area of ​​the cable mainly depends on the waterproof cover of the pre-buried nozzle. How the sealing structure of the waterproof cover has an important impact on the anti-corrosion of the cable anchor. In order to ensure that the anchorage area of ​​the cable has a good sealing effect, the current development mainly focuses on the following three aspects: 1. Improve the waterproof cover. At present, there are cast iron, stainless steel, HDPE, and rubber waterproof covers. Due to the relatively large rigidity of the structure of the first three types, the vibration of the cable is easy to damage the sealing structure. To solve this problem, only one end can be ...

AI Technical Summary

Problems solved by technology

2. Fill the pre-embedded pipe with polyurethane foam material (see "A New Anti-corrosion Method for Filling the Embedded Pipe at the End of Cable-Stayed Bridge"). Most of the foamed polyurethanes currently on the market cannot achieve sealing and water resistance effect, but the function of absorbing water, which creates conditions for the corrosion of the cable anchorage. In addition, filling the polyurethane foam material in the embedded pipe is not conducive to the later inspection and replacement of the cable

For the non-vulcanized sealant, the main reason is that it does not bond well with the HDPE of the cable, and it is easy to detach under the vibration of the cable and cannot block water.

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