Recycling type smoke control method of tunnel

Abstract

The invention belongs to the fields of highway tunnels and railway tunnels, and particularly relates to a recycling type smoke control method of a tunnel. The method mainly aims at solving the existing condition that the pressurized air supplying effect of the current tunnel safe exit passageway is limited, and provides a recycling type air curtain machine which is arranged at the junction of the tunnel safe exit passageway and a main tunnel. An air supplying slot on the air curtain machine forms a high-pressure air curtain for preventing smoke in the main tunnel from entering the safe exit passageway; and an air backflow port on the air curtain machine returns the backflow air to a duster through an air pipe, the duster removes the probable mixed smoke in the backflow air, and the clean air is conveyed to the air supplying slot on the recycling type air curtain machine again through a fan, thus the safe exit passageway is guaranteed to be smokeless through the circulation.

Description

technical field [0001] The invention belongs to the field of road tunnels and railway tunnels, and in particular relates to a method for preventing smoke in a recycling type tunnel. Background technique [0002] The tunnel evacuation channel is the escape channel for people to evacuate when a fire breaks out in the tunnel. When a road tunnel or railway tunnel is equipped with a safe evacuation passage parallel to the tunnel, in order to prevent the fire smoke in the driving tunnel from entering the safe evacuation passage, according to Article 12.3.3 of the "Code for Fire Protection Design of Buildings" (GB 50016-2006): Tunnel fire An independent mechanical pressurized air supply system should be installed in the refuge facility, and the residual pressure value of the air supply should be 30-50pa. Existing smoke prevention systems for tunnel evacuation passages generally use axial flow fans at both ends of the tunnel to pressurize the evacuation passages. The length of safe...

AI Technical Summary

Problems solved by technology

Existing smoke prevention systems for tunnel evacuation passages generally use axial flow fans at both ends of the tunnel to pressurize the evacuation passages. The length of safe evacuation passages usually exceeds 1km, and the length of long tunnels may even reach more than 5km. The radius of the pressurized air supply is as long as several kilometers. Due to the limited level of civil construction, the capacity of the pressurized blower is large and the effect is poor. Therefore, it is difficult for the existing tunnel evacuation channel smoke prevention system to ensure that any position in the tunnel can have a good smoke prevention effect.

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