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A device and installation method for preventing frost damage in tunnels in seasonally frozen soil regions

An installation method and technology in permafrost areas, applied in tunnels, earth-moving mining, mining equipment, etc., can solve problems such as poor thermal insulation effect, high energy consumption, limited applicability, etc., to avoid freeze-thaw fatigue damage and save energy , the effect of improving the overall efficiency

Active Publication Date: 2020-10-02
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

At present, the two methods have their own disadvantages. For example, the active insulation method consumes too much energy, and the applicability of permafrost tunnels in some seasons with low temperatures is obviously limited. The passive insulation method has a short-term effect, but long-term insulation The effect is often not good. Of course, a combination of active and passive insulation methods has been developed, but the actual effect is still not very good, especially in tunnels in permafrost areas with low annual average temperatures. Lining cracks and water leakage often occur

Method used

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  • A device and installation method for preventing frost damage in tunnels in seasonally frozen soil regions
  • A device and installation method for preventing frost damage in tunnels in seasonally frozen soil regions
  • A device and installation method for preventing frost damage in tunnels in seasonally frozen soil regions

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] A tunnel frost damage prevention device in a seasonally frozen soil region, comprising a support system arranged in the tunnel 12, a refrigeration system is arranged in the support system, the refrigeration system is connected to a control system, and both the refrigeration system and the control system are connected to a power supply system;

[0030] The support system includes primary support 1 and secondary lining 5. The primary support 1 is in contact with the inner surface of the tunnel 12. There is an inner cavity between the primary support 1 and the secondary lining 5, and a waterproof layer 2 and an insulating layer are arranged in the inner cavity. 4. The waterproof layer 2 is in contact with the primary support 1, and the insulation layer 4 is in contact with the secondary lining 5;

[0031] The refrigeration system includes a cold bath tube 3 placed ...

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Abstract

The invention discloses a frost damage prevention and control device for tunnels in seasonally frozen soil regions and a mounting method. Preliminary bracers and secondary linings are arranged on theinner surfaces of the tunnels, and cold bath pipes are disposed in the preliminary braces and the secondary linings and connected to a refrigeration chamber. By means of the device, subzero temperature of surrounding rock of the seasonally frozen soil tunnels can be maintained all the time, and damage caused by freezing and thawing cycle of the surrounding rock to the tunnel linings is reduced. The device is different from existing anti-freezing methods for seasonally frozen soil tunnels and involves several procedures more than the process of raising the temperature blindly to ensure that thesurrounding rock of the tunnels is not frozen. A temperature sensor connected to a central control chamber is arranged in the device and can collect the internal temperature of the tunnels in real time and adjust the refrigeration amount in time, and the overall efficiency is improved.

Description

technical field [0001] The invention belongs to the field of tunnel engineering disease prevention and control in cold regions, and in particular relates to a tunnel freezing damage prevention device and an installation method in seasonally frozen soil regions. Background technique [0002] With the continuous improvement of my country's expressway network, many tunnel projects have also been built in seasonally frozen soil areas. According to current research data, tunnels in seasonally frozen soil areas often suffer from lining cracks and peeling, lining cracks and water leakage, etc., which seriously threaten the safety of tunnel traffic. Unlike tunnels in permafrost regions, frost damage to tunnels in seasonally frozen regions is more obvious. The reason is that the temperature outside the tunnel changes periodically, which leads to periodic changes in the tunnel lining and surrounding rock. When the temperature is high in summer, the surrounding rock melts. The water c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00
CPCE21D9/001
Inventor 张玉伟宋战平王军保牛泽林刘乃飞
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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