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Leaking stoppage method for seam of duct piece of power cable tunnel

A technology for tunnel segment and power cable, which is applied in tunnels, tunnel linings, and earth-moving drilling and mining, etc., can solve the problems of increased instability, cable damage, and excessive cable deformation, and achieves simple operation, convenient plugging, and resistance to leakage. Good corrosion performance

Active Publication Date: 2015-03-18
SHANGHAI MUNICIPAL ELECTRIC POWER CO +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For traffic tunnels, if the longitudinal uneven settlement of the tunnel is too large, the longitudinal height difference of the road surface will be too large, and the road surface height difference and flatness exceed the standard. The maintenance task is aggravated; for the power cable tunnel, when the longitudinal deformation is too large, it will bring additional stress to the cable to deform it, and even cause damage to the cable in severe cases, affecting power transmission
Therefore, the longitudinal uneven settlement of the tunnel has caused huge economic losses to the tunnel operation management department and the country, causing serious adverse effects
[0003] The hazards of uneven settlement of the power tunnel structure are mainly: (1) causing cracks in the joints of the tunnel segments and reducing the waterproof performance; (2) causing the tunnel structure to be in an unfavorable stress state and increasing the instability; (3) increasing the cable Additional stress, resulting in excessive deformation or even damage to the cable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for plugging the joints of power cable tunnel segments. The method uses the steps of widening the gaps, sealing the inner cavity, caulking flexible materials, and chemical grouting to plug the joints of the power cable tunnel segments. Specifically Include the following steps:

[0019] (1) Widen the joint less than 2cm on the power cable tunnel segment. The widened joint is chiseled into a figure-eight groove along the crack, with a depth of 35mm and a width of 25mm, rinsed with clean water, and then evacuated to widen the inner cavity of the seam;

[0020] (2) Install a grouting nozzle on the blocked joint, and then inject polyurethane grouting liquid into the joint through the grouting nozzle to perform grouting and water-stopping;

[0021] (3) After the grouting is completed, wait for the polyurethane grouting liquid to solidify and remove the grouting nozzle, and then block the grouting hole where the grouting nozzle is installed;

[0022] (5) A silicone ...

Embodiment 2

[0024] A method for plugging the joints of power cable tunnel segments. The method uses the steps of widening the gaps, sealing the inner cavity, caulking flexible materials, and chemical grouting to plug the joints of the power cable tunnel segments. Specifically Include the following steps:

[0025] (1) Widen the joint less than 2cm on the power cable tunnel segment. The widened joint is chiseled into a figure-eight groove along the crack, with a depth of 40mm and a width of 20mm, rinsed with clean water, and then widened toward The PE foam strips are embedded in the seams of the joints, and the seams are blocked;

[0026] (2) Install a grouting nozzle on the blocked joint, and then inject epoxy resin polymer grouting material into the joint through the grouting nozzle to prevent water from grouting;

[0027] (3) After the grouting is completed, wait for the polymer grouting material to solidify and remove the grouting nozzle, and then block the grouting hole where the grou...

Embodiment 3

[0030] A method for plugging the joints of power cable tunnel segments. The method uses the steps of widening the gaps, sealing the inner cavity, caulking flexible materials, and chemical grouting to plug the joints of the power cable tunnel segments. Specifically Include the following steps:

[0031] (1) Widen the joint less than 2cm on the power cable tunnel segment. The widened joint is chiseled into a figure-eight groove along the crack, with a depth of 40mm and a width of 20mm, rinsed with clean water, and then widened toward The PE foam strips are embedded in the seams of the joints, and the seams are blocked;

[0032] (2) Install a grouting nozzle on the blocked joint, and then inject acrylamide polymer grouting material into the joint through the grouting nozzle for grouting and water-stopping;

[0033] (3) After the grouting is completed, wait for the polymer grouting material to solidify and remove the grouting nozzle, and then block the grouting hole where the grou...

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Abstract

The invention relates to a leaking stoppage method for a seam of a duct piece of a power cable tunnel. The leaking stoppage method comprises the following steps of: chiseling and widening a gap, plugging an inner cavity, caulking by using flexible materials and carrying out chemical grouting processing so that leaking stoppage is performed on the seam of the duct piece of the power cable tunnel. Compared with the prior art, the leaking stoppage method provided by the invention has the characteristics of simplicity in operation, convenience in leaking stoppage, convenience and quickness in processing fissures occurred in the power cable tunnel and better corrosion resistance.

Description

technical field [0001] The invention relates to a method for plugging leakage, in particular to a method for plugging the joints of power cable tunnel segments. Background technique [0002] With the massive construction and operation of tunnels at home and abroad, the longitudinal settlement of tunnels, especially the longitudinal uneven settlement, has gradually emerged. A large number of soft soil tunnels have excessive longitudinal settlement or uneven settlement due to various reasons, causing leakage of water and mud in the tunnel or local damage to the structure, or longitudinal distortion of the internal structure, which affects the normal operation of the tunnel and affects the safety of the tunnel structure and operation. Sex and comfort have certain potential threats, which in turn affect the operation of various structures around and on the surface. For traffic tunnels, if the longitudinal uneven settlement of the tunnel is too large, the longitudinal height dif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/38
Inventor 苏文群王承李海叶菲菲梁浩钱锡汇杨雨冰谢雄耀
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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