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Construction method of tunnel thermal insulation in severe cold area

A construction method and tunnel technology, applied in tunnels, tunnel linings, underground chambers, etc., to achieve the effects of reducing construction costs, less construction equipment, and shortening the construction period

Inactive Publication Date: 2018-11-13
CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP OF THE FIFTH ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, it is the most effective measure for preventing and controlling frost damage in tunnel engineering; therefore, current tunnel engineering is badly in need of effective measures for preventing and controlling frost damage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The present invention is realized through the following technical scheme, the thermal insulation construction method of the tunnel in the severe cold area, after the clearance of the secondary lining, the surface smoothness and the water seepage condition are checked to pass, the expansion bolts are installed to fix the thermal insulation board on the surface of the secondary lining, and then Lay fireproof panels and spray fireproof coatings.

[0036] It should be noted that through the above improvements, the construction process is simple, the construction equipment is less, the construction period is effectively shortened, there is no special requirement for the working environment, and the environmental pollution is small, the construction cost is effectively reduced; the spring melting period is effectively prevented The infiltration that occurs causes various freezing damages, ensuring the temperature of the structure and driving safety.

[0037] Other parts of th...

Embodiment 2

[0039] This embodiment is further optimized on the basis of the above embodiments, specifically including the following steps:

[0040] Step S1: construction preparation;

[0041] Step S2: Construction of the thermal insulation and fireproof layer;

[0042] Step S22: drilling and embedding expansion bolts;

[0043] Step S23: installing and adjusting the U-shaped clip;

[0044] Step S24: installing the insulation board;

[0045] Step S25: installing a fireproof board;

[0046] Step S26: spraying fireproof paint;

[0047] Step S27: construction of the insulation layer of the cable duct; the construction is completed.

[0048] It should be noted that through the above improvements, the construction preparation specifically refers to first cleaning up impurities such as floating ash, oil stains, and soil on the surface of the secondary lining of the tunnel; specifically, the following technical means are used: first use clear flushing, and then remove unevenness or Repair th...

Embodiment 3

[0051] This embodiment is further optimized on the basis of the above embodiments, and the step S24 specifically includes:

[0052] Step S241: Penetrating the insulation board through the U-shaped clip, and sealing the gaps between the insulation boards with polyurethane foam caulking agent, so that the insulation board completely covers the surface of the secondary lining, and no gaps are left between the insulation boards.

[0053] Step S242: Fix the light steel keel; specifically refers to: the U-shaped light steel keel is fixed on the U-shaped clamp after the U-shaped clamp penetrates the insulation board and bent; the extension direction of the U-shaped light steel keel is the same as the depth of the tunnel The direction is the same; when the U-shaped light steel keel needs to be lengthened, use the extension piece to connect the U-shaped light steel keel.

[0054] Other parts of this embodiment are the same as those of the foregoing embodiments, so details are not repea...

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PUM

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Abstract

The invention discloses a construction method of tunnel thermal insulation in a severe cold area. After the examinations of secondary lining clearance, surface evenness and water seepage situation arequalified, expansion anchor bolts are arranged to enable thermal insulation boards to be fixed to the surface of a secondary lining, and then fire prevention boards are laid and fire retardant coating is sprayed. The construction method of the tunnel thermal insulation in the severe cold area has the beneficial effects that the construction procedure is simple, the construction equipment is less,the construction period is effectively shortened, no special requirements for the operating environment is performed, tunnel environment pollution is small, and the construction cost is effectively reduced. Various freeze injuries caused by infiltration during the spring thawing period are effectively prevented, and the temperature of a structure and the traffic safety are guaranteed.

Description

technical field [0001] The invention relates to the technical field of tunnel thermal insulation and fireproof layer construction, in particular to a tunnel thermal insulation construction method in severe cold regions. Background technique [0002] With the rapid development of my country's transportation industry, especially with the further implementation of the policy of developing the west and revitalizing the Northeast economy, a large number of tunnels will be built in the high-altitude west and high-latitude cold areas in the north, which is different from the previous cold areas. These tunnels will be larger, more technically demanding, and subject to harsher climatic conditions than conventional tunnels. [0003] In the prior art, it is an effective measure for preventing and controlling frost damage in tunnel engineering; therefore, the current tunnel engineering is in urgent need of effective measures for preventing and controlling frost damage. Contents of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/38E21F5/00
CPCE21D11/38E21F5/00
Inventor 徐少平
Owner CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP OF THE FIFTH ENG
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