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Tunnel water seepage and harmful gas discharge structure and semi-closed ice-filled drilling construction method

A technology of harmful gases and construction methods, applied in tunnels, tunnel linings, drainage, etc., can solve problems such as high separation costs, difficulty in separating harmful gases from water, and high operational safety risks

Active Publication Date: 2020-10-23
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the solution of tunnel water seepage through negative pressure drainage in the prior art, which has the problem of grouting, resulting in unsatisfactory negative pressure formation effect, and at the same time, the harmful gas escaping along the drainage structure is difficult to separate from the water, and the separation cost is high. Due to the above shortcomings such as complex construction and high operational safety risks, a construction method for tunnel water seepage and harmful gas discharge structure and semi-enclosed ice-filled drilling is provided

Method used

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  • Tunnel water seepage and harmful gas discharge structure and semi-closed ice-filled drilling construction method
  • Tunnel water seepage and harmful gas discharge structure and semi-closed ice-filled drilling construction method
  • Tunnel water seepage and harmful gas discharge structure and semi-closed ice-filled drilling construction method

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Embodiment 1

[0040] Such as figure 1 As shown, the tunnel 6 has no requirement for the discharge of harmful gases, and is mainly aimed at water seepage control. A tunnel water seepage and harmful gas discharge structure according to the present invention includes a water permeable pipe 1, and the water permeable pipe 1 is arranged in the water permeable section of the borehole In 21, the position of the borehole is determined according to the position of the water seepage point. It is drilled from the side wall of the tunnel 6 with an inclination. The inclination angle between the borehole and the horizontal plane is 5-10°. As with the grouting section 22, the length of the grouting section 22 is the same as the thickness of the lining concrete of the tunnel 6, and the length of the permeable section 21 is, for example, 5-10m, if the thickness of the lining concrete of the tunnel 6 is uncertain , the length of the grouting section 22 is 0.5-0.6m. A water-stop member 23 is set between the ...

Embodiment 2

[0047] A kind of semi-enclosed ice-filled drilling construction method according to the present invention adopts the discharge structure as described in Embodiment 1, and comprises the following steps:

[0048] a. According to the position and range of the water seepage point on the side wall of the tunnel 6 and the escape point of harmful gas (if any), correspondingly drill downwardly inclined boreholes;

[0049] b. Set a permeable pipe 1 in the permeable section 21 of the borehole, and then insert a drain pipe 4 into the permeable pipe 1, so that the port of the drain pipe 4 goes deep into the bottom of the permeable pipe 1;

[0050] c. Fill the permeable pipe 1 with ice cubes 3 and compact it, and then install a water-stop member 23 to block the permeable section 21;

[0051] d, enter the grout 24 into the borehole to form the grouting section 22, and complete the construction of the discharge structure; the grouting pressure can be increased during grouting, and the grout ...

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Abstract

The invention discloses a tunnel water seepage and harmful gas discharge structure and a semi-closed ice-filled drilling construction method. The structure includes a permeable pipe arranged in a permeable section of a drilling hole. The drilling hole includes the permeable section and a grouting section, the drilling hole is drilled from the side wall of a tunnel, a water stop member is arrangedbetween the permeable section and the grouting section, the permeable pipe is filled with ice, and the permeable section is internally provided with an water inlet of a drainage pipe; and the elevation of the water inlet of the drainage pipe is higher than the elevation of a water outlet of the drainage pipe, and the lift of the drainage pipe is less than the height of a water column correspondingto the atmospheric pressure. According to the tunnel water seepage and harmful gas discharge structure, harmful gases in the surrounding rock in the drainage link can be effectively discharged, the situation that the harmful gas escapes or is greatly accumulated in the surrounding rock is reduced, the safety risk is reduced, and the water-stop member can be effectively supported during grouting,the structure is beneficial to increase the grouting pressure, the negative pressure effect of the permeable section improved, and the tunnel water seepage and harmful gas discharge structure is conducive to ensuring continuous drainage and exhaust effects and is of great significance to solving the problem of tunnel water seepage and gas leakage.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a tunnel water seepage and harmful gas discharge structure and a semi-enclosed ice-filled drilling construction method. Background technique [0002] Local groundwater seepage occurs when the waterproof layer or lining structure of the tunnel is defective. Especially in water-rich tunnels, the water seepage is more serious. Water seepage from the wall of the tunnel will have a negative impact on the safe operation of the tunnel, and even damage the tunnel lining concrete and the internal structure of the surrounding rock, reducing the durability of the tunnel structure and shortening the service life of the tunnel. . At present, the commonly used tunnel water seepage treatment method: for small area water seepage, quick-setting material is commonly used to block water by grouting, using dense horizontal and circular drainage holes, and adding longitudinal blind ditch ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F16/02E21F17/00E21D11/10E21D11/38
CPCE21D11/10E21D11/38E21F16/02E21F17/00
Inventor 范雲鹤喻渝郑长青孙红月赵万强胖涛何昌国刘洋尚岳全帅飞翔罗禄森齐春曾勤
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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