Energy-saving ventilation method based on existing railway tunnel and inclined shaft for newly-built tunnel construction

An existing railway and tunnel construction technology, which is applied in mine/tunnel ventilation, tunnel, earthwork drilling and mining, etc., can solve the problems of small section of inclined shaft, limited diameter of air duct, long ventilation distance, etc., and reduce energy consumption , reduce the length of the ventilation supply, and reduce the incidence of disease

Active Publication Date: 2020-12-29
CHINA RAILWAY NO 3 GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]The purpose of the present invention is to solve the long ventilation distance in the construction of a new long tunnel using the original inclined shaft, the original inclined shaft section is small, and the diameter of the air duct is limited And other issues

Method used

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  • Energy-saving ventilation method based on existing railway tunnel and inclined shaft for newly-built tunnel construction
  • Energy-saving ventilation method based on existing railway tunnel and inclined shaft for newly-built tunnel construction
  • Energy-saving ventilation method based on existing railway tunnel and inclined shaft for newly-built tunnel construction

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Embodiment Construction

[0026] In conjunction with accompanying drawing, the specific embodiment of the present invention is described further:

[0027] Such as figure 1 As shown, the overall technical solution adopted by the present invention is: use the existing operating tunnel as a ventilation source for air supply, that is, install a fan at the downstream sealing wall at the intersection of the existing inclined shaft and the new branch tunnel, and extract the unused air through the fan. Utilize the fresh air in the section inclined shaft to supply the tunnel face construction. Under the action of fresh air, the polluted air is discharged out of the cave along the newly built tunnel and the existing inclined shaft. In order to speed up the discharge of sewage air, jet fans are installed at intervals of 200~300m in the utilization section of the inclined shaft to accelerate the discharge of sewage air. At the same time, a multi-stage spray dust suppression curtain is set in the return air incli...

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Abstract

The invention belongs to the field of tunnel construction, and discloses an energy-saving ventilation method based on an existing railway tunnel and an inclined shaft for newly-built tunnel construction. The energy-saving ventilation method comprises the following steps that a blocking wall and a fan are arranged at the downstream of a divergence of the existing inclined shaft and a newly-built adit, the fan is used for extracting fresh air in the inclined shaft in an unused section, and the fresh air supplied to tunnel face construction of a newly-built tunnel; under the action of the fresh air, dirty air is exhausted out of the tunnel along the newly-built tunnel and the existing inclined shaft; in order to increase the dirty air exhaust speed, jet fans are arranged in a utilization section of the inclined shaft at intervals of 200-300 m, and dirty air exhaust is accelerated. and meanwhile, a multi-stage spraying dust falling curtain is arranged in an air return inclined shaft, so that pollutants such as solid particles in the air are reduced, and the ventilation effect is improved. According to the method, the ventilation air supply length can be reduced, and the ventilating fanpower is reduced, so that energy consumption is reduced.

Description

technical field [0001] The invention belongs to the field of tunnel construction, and relates to the construction technology field of using an existing tunnel as a source of fresh air and an existing inclined shaft as an air supply channel to supply air to the face of a newly-built tunnel, and is mainly aimed at newly-built long tunnels and newly-built railways Or use the existing inclined shaft to construct a new line, supply air to the face of the tunnel excavation, and solve the problems of long ventilation distance and poor ventilation effect caused by the traditional inclined shaft head layout fan. Background technique [0002] Traditional new tunnel ventilation mainly includes push-in type, extraction type, and mixed roadway ventilation methods. Take press-in ventilation as an example. Ventilate from the entrance of the tunnel. By installing an axial flow fan at the entrance of the newly-built tunnel, fresh air is drawn from the outside of the tunnel, and the press-in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F1/00E21D9/14E21F17/103E21F17/12E21F5/04
CPCE21F1/003E21D9/14E21F17/103E21F17/12E21F5/04
Inventor 张延峰陈善民甄文付晓玉郑保才黄贵平汤佳宁秦亮胡宏博席海龙冯剑峰
Owner CHINA RAILWAY NO 3 GRP CO LTD
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