Long tunnel ventilation system capable of achieving long-distance air supply

Abstract

A long tunnel ventilation system capable of achieving long-distance air supply is mainly structurally characterized in that three transverse channels closest to the tunnel faces are sequentially the tunnel face transverse channel, the first air storage transverse channel and the second air storage transverse channel; ports of the first and second air storage transverse channels are sealed by steel plates, and transverse channel axial flow fans are arranged at air outlet connectors of the first and second air storage transverse channels respectively; a first axial flow fan and a second axial flow fan are arranged at the well mouth of an inclined shaft; the first axial flow fan and the second axial flow fan are connected with air inlet connectors of the first and second air storage transverse channels through a first air inlet pipe and a second air inlet pipe respectively; the front end of a first air outlet pipe is connected with the transverse channel axial flow fan of the first air storage transverse channel, the first air outlet pipe passes through a second tunnel and the tunnel face transverse channel to reach the tunnel face of a first tunnel; the front end of the second air outlet pipe is connected with the transverse channel axial flow fan of the second air storage transverse channel, and the second air outlet pipe extends forwards along the second tunnel to reach the tunnel face of the second tunnel. The operation cost of the system is low, the ventilation efficiency is high, and the construction progress and safety of the tunnels can be better guaranteed.

Description

technical field [0001] The invention relates to a long tunnel ventilation system for long-distance air supply and a construction method thereof. Background technique [0002] Ventilation is an indispensable technical link in the tunnel construction of railways, highways, water conservancy, hydropower, industrial and mining, national defense projects and urban subway projects. In the case of mechanized operations, ventilation supplies fresh air to the construction site in the tunnel, removes dust and various toxic and harmful gases, creates a good working environment, and ensures the health and safety of construction workers; at the same time, ventilation also maintains the normal operation of mechanical and electrical equipment in the tunnel. necessary conditions for operation. For various long tunnel constructions, ventilation often plays a non-negligible or even decisive role in the construction plan and construction organization design of the entire project. [0003] In...

AI Technical Summary

Problems solved by technology

The disadvantage of this ventilation method is that the fresh air drawn in by the axial flow fan from the entrance of the inclined shaft needs to be transported to the face of the tunnel by the air duct through a long distance, which requires more air ducts and a longer time. The air leakage rate of the air duct is relatively large, and the ventilation efficiency is difficult to guarantee

In addition, because the axial flow fan at the inclined wellhead needs to send air to the vicinity of the tunnel face at one time, when the air supply distance is too long, the fan needs to operate at high power for a long time, which consumes a lot of power, causes great damage to the fan, and high operation and maintenance costs

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