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Tunneling engineering freeze-proofing structure in seasonally frozen ground region

A tunnel engineering and seasonal technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., to achieve the effect of protecting frozen soil, high economic significance, and inhibiting frost heave

Inactive Publication Date: 2012-01-18
建发合诚工程咨询股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These measures face great challenges under the general trend of global warming

Method used

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  • Tunneling engineering freeze-proofing structure in seasonally frozen ground region
  • Tunneling engineering freeze-proofing structure in seasonally frozen ground region
  • Tunneling engineering freeze-proofing structure in seasonally frozen ground region

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Embodiment Construction

[0018] see Figure 1~4 , the embodiment of the present invention is provided with several antifreeze pipes 2 ( figure 2 6 are shown in the figure), each antifreeze pipe 2 is arched and arranged horizontally in the tunnel lining structure, and is located between the waterproof layer 3 of the tunnel lining structure and the secondary lining 1, and one end 21 of the antifreeze pipe passes through the left bottom of the tunnel The permafrost region extends downwards, and the other end 22 of the antifreeze pipe passes through the permafrost region at the bottom right side of the tunnel and extends downwards. A distance along the longitudinal direction of the tunnel is arranged between each antifreeze pipe 2 , and air is sealed in each antifreeze pipe 2 .

[0019] The diameter of the antifreeze pipe 2 is 8cm (it may be 5-10cm), and the distance between two adjacent antifreeze pipes 2 along the longitudinal direction of the tunnel is 3m (it may be 0.5-5.0m). Both ends of the antif...

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Abstract

The invention provides a tunneling engineering freeze-proofing structure in a seasonally frozen ground region, relating to a tunneling structure. The freeze-proofing structure is low in cost and convenient in construction and maintenance, and can protect frozen grounds effectively. The freeze-proofing structure is provided with at least 2 arched freeze-proofing tubes and each arched freeze-proofing tube is horizontally arranged in a tunnel lining structure and positioned between a waterproof layer and a secondary lining; one end of each freeze-proofing tube passes through a frozen ground zone at the bottom at the left of the tunnel and then extends downwards, and the other end of the freeze-proofing tube passes through a frozen ground zone at the bottom at the right of the tunnel and then extends downwards; gaps among the freeze-proofing tubes exist in the longitudinal direction of the tunnel and air is sealed in each freeze-proofing tube. The air in the freeze-proofing tubes is utilized to carry out heat exchange so as to transmit heat in surrounding rocks to the secondary lining, thus water in surrounding rocks adjacent to the tunnel can be prevented from being frozen and dangers such as frost heaving and the like of seasonally frozen ground tunneling engineering can be restrained effectively, thereby reaching the purpose of protecting the frozen grounds.

Description

technical field [0001] The invention relates to a tunnel structure, in particular to a tunnel engineering antifreeze structure in a seasonal frozen soil area. Background technique [0002] A large number of engineering practices have shown that there are difficult problems of frost heave when constructing tunnels in seasonally frozen soil regions. The tunnel passes through the seasonally frozen soil area. Due to heat balance, the ice in the frozen soil in the seasonally frozen soil melts during the high temperature season, while the water in the frozen soil freezes into ice in the low temperature season, thus causing frost damage to the support structure of the tunnel. Swelling effect. Frost heave is the main cause of tunnel damage in seasonally frozen soil. In order to control tunnel diseases in seasonally frozen soil within the allowable range of project operation, tunnel projects in seasonally frozen soil areas are basically designed according to the principle of "preve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/38
Inventor 张学富陈俊平林东明周元辅
Owner 建发合诚工程咨询股份有限公司
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