Cable-end sealing method for suspension cable of suspension bridge

Abstract

The invention relates to a cable-end sealing method for a suspension cable of a suspension bridge, which includes the steps: firstly, completely peeling a segment of a polyethylene sheath to expose a steel wire bundle at the end of the suspension cable according to the length requirement of grouted anchor in an anchorage device; secondly, sectioning the polyethylene sheath lengthwise to obtain two slits to form two semicircular sheath sections with the tails connected; thirdly, passing the steel wire bundle through the anchorage device for wire splitting; fourthly, mounting the steel wire bundle into the anchorage device when the steel wires are split, using a fixture to clamp the sectioned semicircular sheath sections with the tails connected, and performing anchor grouting; fifthly, removing the fixture after anchor grouting, welding the two semicircular sheath sections with the tails connected, and mounting a steel connecting cylinder on the exposed steel wire bundle; and sixthly, pouring epoxy resin first between the polyethylene sheath and the connecting cylinder, using water swellable rubber strips and water swellable rubber putty to fill the ends of the connecting cylinder,fastening a rear cap, and filling a gap between the rear cap and the polyethylene sheath with water swellable rubber putty. The cable-end sealing method meets the use requirements of the suspension cable in terms of durability and scenery.

Description

technical field [0001] The invention relates to a cable end sealing structure of a suspension bridge. It belongs to the technical field of bridge engineering. Background technique [0002] Suspension bridge suspension cables are the main force-bearing components that transmit bridge deck loads to the main cables through cable clamps. The sling anchor is a force-transmitting member that connects the sling body with the cable clamp and the beam. Anchors and cable bodies are usually poured with zinc-copper alloy or epoxy resin to form anchors. The anti-corrosion polyethylene sheath of the sling needs to be stripped during this process. Therefore, this part becomes a main channel for water and other harmful substances to enter the cable body. In view of the above reasons, the cable end sealing technology is used to prevent water and other harmful substances from entering the sling body, which will affect the durability of the sling. Therefore, the cable end sealing structur...

AI Technical Summary

Problems solved by technology

[0010] 1) Due to the long connection barrel and long perfusion flow channel, the perfusion density is not enough, resulting in poor sealing effect;

[0011] 2) There are errors in the processing of the sealing rubber ring, sling and connecting cylinder, and the deformation of the sealing rubber ring after compression is limited, and it cannot adapt to all sealing spaces, resulting in the sealing effect not being able to fully meet the requirements;

[0012] 3) The heat-shrinkable sleeve is a cross-linked polyethylene material. The service life of the colored heat-shrinkable sleeve is lower than that of the high-density polyethylene material used for the sling sheath. In order to ensure its anti-corrosion life, the heat-shrinkable sleeve used The shrink sleeve material can only be used in black, which cannot be coordinated with the color of the colored sling sheath from the perspective of the landscape; in addition, during the heating process of the heat shrinkable sleeve material, the process is difficult to accurately control its heating temperature, and it is prone to overheating;

[0013] 4) Since the heat shrinkable sleeve is thin, it is easy to be damaged during construction

[0014] Therefore, the traditional sling sealing structure cannot meet the use requirements of slings in terms of durability and landscape

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