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Construction Ventilation Method of Dashanling Tunnel

A technology for tunnel construction and ventilation methods, which is applied in mine/tunnel ventilation, separation methods, chemical instruments and methods, etc., and can solve problems such as high concentration of dust and harmful gases, and endangering the health of construction workers

Active Publication Date: 2021-11-09
CHINA ROAD & BRIDGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although this ventilation method can save pipelines, the dirty gas will fill another hole, making the other hole have a higher concentration of dust and harmful gases, seriously endangering the health of construction workers in this hole

Method used

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  • Construction Ventilation Method of Dashanling Tunnel
  • Construction Ventilation Method of Dashanling Tunnel
  • Construction Ventilation Method of Dashanling Tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0046] A construction ventilation method for Dashanling Tunnel, which comprises the following steps:

[0047] 1) Before the tunnel is excavated to 1200 meters, the left-line fan and the right-line axial flow fan 9 are respectively installed outside the left-line tunnel 1 and right-line tunnel 2 to press fresh air into the construction tunnel. The left-line tunnel 1 and the right-line tunnel 2 are provided with a number of cross passages 10, the distance between the cross passages 10 is 200-250 meters, use the two cross passages 10 closest to the construction face 3 for traffic diversion, and close other cross passages 10;

[0048] 2) After the tunnel is excavated to 1200 meters, along with the forward movement of the construction face 3, an air collection chamber 11 is installed on the transverse passage 10 closest to the construction face 3, and the wall of the tunnel 1 on the left line is provided with soft wind Pipe 4, the flexible air pipe 4 is spliced ​​by a plurality of ...

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Abstract

The present invention disclosed a ventilation method of the Long Mountain Ridge Tunnel. It includes the following steps: 1) Before the tunnel is excavated 1.2 kilometers, a compression method is used to ventilate.Channel, use the two horizontal channels of the nearest horizontal passage from the construction of the construction palm, and close the other horizontal channels; 2) After the tunnel excavates 1.2 kilometers, set the clustering room on the horizontal channel closest to the construction palm.The dirty gases in the gathering room are discharged through the soft air pipe, and there is a fan fan at the rear of the secondary passage of the second similar to the construction of the palm. There is a ventilation pipe between the fan fan and the construction palm.After excavating 2.5 kilometers, the axis fans set up outside the cave move forward 1000 meters forward, set the firing fan behind the fan fan, and move forward with the forward shift of the construction palm surface.The present invention has the characteristics of timely discharge of dirty gases in the cave and avoiding excretion of gas pollution environment.

Description

technical field [0001] The invention relates to the field of tunnel construction ventilation. More specifically, the present invention relates to a kind of ventilation method of Dashanling tunnel construction. Background technique [0002] With the rapid development of my country's railways, highways and water diversion projects, there are more and more extra-long and long tunnels. With the development of the technical level, the mechanized construction level of tunnel excavation is also getting higher and higher, so that during the tunnel excavation process, the air is often mixed with various dusts, toxic and harmful gases produced by mechanical equipment and other harmful gases, and the environment in the tunnel serious pollution. At present, during the construction of long-distance tunnels with parallel double holes, one hole is usually used as an air inlet channel, and the other hole is used as an air outlet channel to realize the circulation of air in the hole. Howe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F1/00E21F1/04E21F1/08E21F5/20E21F11/00E21F17/12E06B3/46E06B3/70B01D53/76B01D53/72B01D53/52B01D53/56
CPCB01D53/52B01D53/56B01D53/72B01D53/76E06B3/4636E06B3/70E06B2003/7049E21F1/006E21F1/04E21F1/08E21F5/20E21F11/00E21F17/12
Inventor 高航庞彪郑甲佳
Owner CHINA ROAD & BRIDGE