Composite lining structure for permafrost tunnel and construction technology

A construction technique and composite technology, applied in the direction of tunnel lining, tunnel, shaft lining, etc., can solve the problems of increasing operation management difficulty and maintenance cost, cracking of tunnel lining structure, economic loss, etc., to avoid engineering quality problems, simple machinery, The effect of guaranteeing the progress of the construction period

Pending Publication Date: 2018-01-16
THE FIFTH ENGEERING OF CHINA RAILWAY 5TH BUREAU GROUP
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  • Abstract
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Problems solved by technology

Therefore, the problem of tunnel antifreeze is the biggest technical problem in tunnel construction in permafrost areas. As the main disease of tunnels, frost damage can cause the tunnel lining structure to crack, peel off or even become unstable due to frost heaving. , the road surfa

Method used

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  • Composite lining structure for permafrost tunnel and construction technology
  • Composite lining structure for permafrost tunnel and construction technology
  • Composite lining structure for permafrost tunnel and construction technology

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specific Embodiment approach

[0032] Composite lining structure: the support structure 1 is followed by the primary lining structure 2, the waterproof and thermal insulation layer 3, the secondary lining structure 4 and the thermal insulation and fireproof layer 5.

[0033] The waterproof insulation layer 3 is composed of a four-layer structure of non-woven geotextile 3-1, waterproof board 3-2, polyurethane heat insulation board 3-3 and non-woven geotextile 3-1.

[0034] The thermal insulation and fire protection layer 5 is connected to the secondary lining structure 4 through expansion bolts 5-7, one end of the expansion bolt 5-7 is installed in the secondary lining structure 4, and the other end is connected to the U-shaped connector 5-3, and the U-shaped connector 5-3 Fixed on both sides of the keel 5-4, the fiber reinforced board 5-2 is fixed on the keel 5-4, and the cavity formed between the fiber reinforced board 5-2 and the secondary lining structure 4 is filled with the thermal insulation board 5-1....

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Abstract

The invention discloses a composite lining technology suitable for a permafrost highway tunnel. The technology of three layers of linings, two layers of water preventing and three layers of heat preservation is adopted, and the technical problem that a high-grade long and big highway tunnel constructed in the permafrost regions suffers from freeze-thaw damage is effectively solved. According to the lining structure of the technology, a primary lining structure, a waterproof heat preservation layer, a secondary lining structure and a heat preservation waterproof layer are sequentially arrangedbelow a support structure. The lining technology mainly comprises primary die forming of low-temperature early strength concrete, waterproof layer construction, heat isolation layer construction, secondary lining of reinforced concrete and hole interior decoration. Compared with a traditional tunnel lining technology, air temperature changes caused by human factors within a secondary lining can beisolated from a perpetually frozen soil layer in the lining technology, it is guaranteed that lining back water can be drained in time, frost heaving is avoided, adopted materials and machines are simple, and operation and construction are easy; and the later project quality problem is solved, the tunnel safety accident probability is reduced, and meanwhile the project progress is guaranteed.

Description

technical field [0001] The invention relates to a composite lining construction method for high-altitude permafrost (level V and VI surrounding rock) tunnels, and belongs to the technical field of tunnel construction. Background technique [0002] Permafrost regions have a severe cold climate and large diurnal temperature differences. The rocks are severely weathered and the rock fissures are developed. Therefore, the problem of tunnel antifreeze is the biggest technical problem in tunnel construction in permafrost areas. As the main disease of tunnels, frost damage can cause the tunnel lining structure to crack, peel off or even become unstable due to frost heaving. , the road surface turns into an ice lake, and the entrance of the tunnel melts and slides, all of which will have a serious impact on safe driving, greatly increase the maintenance cost of operation and management difficulties, cause great economic losses, and even lead to the scrapping of the tunnel. Conten...

Claims

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Application Information

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IPC IPC(8): E21D11/00E21D11/10E21D11/38
Inventor 袁欢蔡明玖李小盼贺小军吴秀雄刘邦玺颜林
Owner THE FIFTH ENGEERING OF CHINA RAILWAY 5TH BUREAU GROUP
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