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Sealing and protecting method by pressure injection of bridge rope corrosion inhibitor

A cable body and pressure technology, which is applied in the direction of bridges, bridge parts, bridge construction, etc., can solve the problems of anchor cup moisture, cable body corrosion, moisture, air and corrosive media cannot be discharged, etc., to achieve extended service life and sealing performance excellent effect

Active Publication Date: 2010-03-17
AVIC BIAM NEW MATERIALS TECH ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing measures have played a certain role in prolonging the life of the cable body, but because the above-mentioned technology can only seal the surface of the cable body, and there are small gaps in the steel strands in the cable body, according to the principle of capillary action, rainwater and Corrosive media are sucked into the gaps between the steel strands, causing the cable body to corrode
[0005] In addition, due to the action of gravity, rainwater and steel strands follow the strands to the anchor cup at the lower part of the cable body, causing the anchor cup to be kept in a wet state for a long time, so that the moisture, air and corrosive media inside the anchor cup cable body cannot be discharged
Therefore, the steel strands of the cable body in this part are very easy to corrode

Method used

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  • Sealing and protecting method by pressure injection of bridge rope corrosion inhibitor
  • Sealing and protecting method by pressure injection of bridge rope corrosion inhibitor
  • Sealing and protecting method by pressure injection of bridge rope corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The surface of the sling at 20.5m-20.55m and 20.65m-20.70m above the rubber buffer of the anchor cup of the sling is filled and sealed with XM37 tape respectively, and then the glue injection fixture is assembled and the bolts are tightened. Inject the HM106 sealant into the cable body from the 20.55m to 20.65m of the sling through the glue injection port of the fixture. After filling, remove the fixture before the HM106 sealant is vulcanized, and evenly wipe the glue on the surface of the sling to shape it; The gap between the buffers is sealed and glass cloth is wrapped around the head of the rubber buffer. After the HM106 sealant is vulcanized for 2 days, connect the discharge port of the pressure injection machine to the injection port of the sealing fixture through the guide tube; start the pressure injection machine, manually inject 9501D sealant into the injection port, and apply pressure slowly 3 minutes, hold pressure for 50 minutes, then slowly apply pressure...

Embodiment 2

[0049] refer to figure 1 , Clean the surface of the sling that needs to be sealed with cotton silk dipped in acetone to remove oil stains, dust and sundries. The surface of the sling at 500mm-550mm and 650mm-700mm above the sling anchor cup rubber buffer is filled and sealed with XM37 tape respectively, and then the glue injection fixture is assembled and the bolts are tightened. Then inject the HM105 sealant into the cable body from the 550mm~650mm of the sling through the glue injection port of the fixture. After filling, remove the clamp before the HM105 sealant is vulcanized, and evenly apply the glue on the surface of the sling to shape it; then fix the clamp on figure 2 In the position shown, seal the gap between the clamp and the rubber buffer at the same time, and wrap the glass cloth to the head of the rubber buffer. After the HM105 sealant is vulcanized for 3 days, connect the discharge port of the pressure injection machine to the injection port of the sealing f...

Embodiment 3

[0051] Use cotton silk dipped in toluene to clean the surface of the cable to be sealed to remove oil stains, dust and sundries. The surface of the sling at 10.46m-10.51m and 10.55m-10.60m above the rubber buffer of the sling is filled and sealed with XM37 tape respectively, and then the glue injection fixture is assembled and the bolts are tightened. Then inject HM106 sealant into the cable body from the glue injection port of the fixture from 10.51m to 10.60mm of the cable. After filling, remove the fixture before the HM106 sealant is vulcanized, and evenly shape the glue on the surface of the sling; then fix the two fixtures at the upper 5.5m and 1.5m of the anchor cup rubber buffer, and Seal the gap between the jig and the rubber bumper, and wrap glass cloth around the head of the rubber bumper. After the HM106 sealant is vulcanized for 1 day, connect the discharge port of the pressure injection machine with the injection port of the sealing fixture through the guide tube...

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Abstract

The invention discloses a pressure sealing injection method of a cable body, which includes the following steps: (a) a section to be sealed is positioned and seal pre-selection is carried out to determine the section to be sealed on the cable body. A clamping device is used for fixing the upper end of the section to be sealed of the cable body and gaps at two ends of the clamping device are blocked up, and then a solidified seal gum with two components is poured into the cable body from a gum injection inlet of the clamping device. After the cable body is filled with the seal gum, the clampingdevice is taken down and shaping is carried out to the seal gum on the surface of the cable body; (b) option is carried out arbitrarily; the method in step (a) of installing the clamping device, pouring the gum, removing the clamping device and shaping is applied to the lower end of the section to be sealed of the cable body; (c) according to the length of the section to be sealed, a clamping device or a plurality of clamping devices are used for bestrewing and fixing the section to be sealed and the clamping device at the top is closely fixed at the position at the lower part filled with thesolidified seal gum with two components of the cable body; (d) the seal gum is used for filling in the gaps between the clamping devices and between the clamp device and a buffer; and (e) pressure injection equipment of a bridge rust inhibitor is used for inputting a non-drying material with low viscosity and with pressure into the gum injection inlet of the clamping device and the material is maintained under the pressure for a while, and then the non-drying material with low viscosity is poured into the gaps among galvanizing stranded steel wires.

Description

technical field [0001] The invention relates to a pressure injection sealing protection method of a bridge cable body. The method can inject a corrosion inhibitor into the steel strand of the bridge cable body (suspension bridge suspension cable, cable-stayed bridge cable). Background technique [0002] Suspension bridges and cable-stayed bridges are the most widely used long-span bridge structures at present. The bridge cable system is the main load-bearing structure of suspension bridges and cable-stayed bridges, and is the lifeline of bridges. Once the cable system corrodes, the consequences will be disastrous. In order to secure the structure of the bridge, the cables must be protected. The main cable protection of suspension bridges has formed a relatively mature technology and has been widely used. But the cable body of suspension bridge and cable-stayed bridge, especially the protection technology of the suspension cable structure of suspension bridge and the suspen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D07B7/14E01D19/00E01D19/16
Inventor 郭万生周军辉李玉林周辉胡立明姜小刚杨忠林黄玖梅于一川李运德师华杨振波
Owner AVIC BIAM NEW MATERIALS TECH ENG