Improved tunnel smoke discharging method and tunnel fume discharging system with independent fume discharging device

Abstract

The invention discloses a method of exhausting smoke independently for a tunnel, comprising procedures as follows: 1) the draft flue with independent structure is arranged outside a main tunnel section; smoke vents with regular intervals are arranged above the section of a main tunnel air channel in the direction of a vertical axis; the smoke vents are connected with the draft flues by a transverse line and a smoke exhausting fan is arranged in a smoke exhausting connecting line; 2) the draft flue, an air valve for exhausting smoke, the smoke exhausting connecting line and the smoke exhausting fan are out of use under normal conditions; and 3) smoke needs to be exhausted when fire breaks out, the air valve for exhausting smoke near smoke source should be opened to exhaust the smoke out of a cave from the tunnel through the draft flue and the smoke exhausting connecting line. The invention discloses a method of using the tunnel smoke exhausting system that is provided with an independent smoke exhausting device. The method simplifies the complexity of controlling the smoke exhausting system reduces normal operating cost and improves the efficiency of smoke exhausting and is beneficial for structure design and construction.

Description

technical field [0001] The invention relates to an improved tunnel smoke exhaust method and a tunnel smoke exhaust system with an independent smoke exhaust device, which are mainly used for smoke exhaust in the case of fire in the tunnel. Background technique [0002] In the existing longitudinal ventilation technology, the problem of independent smoke exhaust in case of fire is not fully considered, and the smoke flows, spreads, and is discharged along the longitudinal direction of the tunnel. It is difficult to ensure the safe escape of personnel for extra-long highway tunnels, especially when there is a large passenger flow; for single-hole two-way traffic fire conditions, secondary accidents and other fire conditions, it cannot effectively solve the smoke exhaust problem during the evacuation stage. In order to solve the safety problem of personnel evacuation under fire conditions in extra-long highway tunnels, and take into account the economy during normal operation, t...

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Problems solved by technology

[0005] 2. If it is necessary to ensure that the area of ​​the wind crossing for normal operation is not reduced, it is necessary to expand the section of the main tunnel, which will increase the civil construction cost of the tunnel;

[0006] 3. The smoke exhaust duct is set on the vault of the main tunnel, with a narrow section and a flat shape, which may affect the efficiency of smoke exhaust, and may bring certain diff...

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