Double-track tunnel provided with vertical shaft smoke discharge and ventilation combined and complemented system

Abstract

The invention discloses a double-track tunnel provided with a vertical shaft smoke discharge and ventilation combined and complemented system. The double-track tunnel provided with the vertical shaft smoke discharge and ventilation combined and complemented system comprises two tunnel tracks, complementary contact air ducts and a smoke discharge vertical shaft, wherein the complementary contact air ducts and the smoke discharge vertical shaft are arranged between the two tunnel tracks. Axial flow fans are arranged in the contact air ducts and used for airflow organization between the two tunnel tracks. An axial flow fan is arranged in the smoke discharge vertical shaft. An air duct is formed in the bottom of the vertical shaft and communicates with an upper tunnel body and a lower tunnel body, and a pair of electric air valves is arranged in the air duct. The electric air valves in the air duct at the bottom of the vertical shaft are opened when no fire exists and used for natural ventilation. When a fire occurs, the electric air valve at the bottom of the portion, in the tunnel body on the no-fire side, of the vertical shaft and the air valves and the axial flow fans in the complementary contact air ducts are closed, and the axial flow fan in the smoke discharge vertical shaft is started for fire smoke discharge. According to the double-track tunnel provided with the vertical shaft smoke discharge and ventilation combined and complemented system, complementary ventilation is achieved through the contact air ducts, and thus the work amount of a ventilation system and a power supply and distribution system can be reduced; and the smoke discharge vertical shaft is used for smoke discharge when a fire occurs and natural ventilation when no fire exists, so that the corresponding vertical shaft scale and the project cost can be reduced, and the service energy-saving capacity and the disaster preventing capacity are improved.

Description

technical field [0001] The invention belongs to the technical field of highway tunnel ventilation design, and in particular relates to a double-lane tunnel with a shaft smoke exhaust combined with a complementary ventilation system. Background technique [0002] Expressways and first-class highway tunnels are dual-tube uplink and downlink one-way tunnels, and cars running in the tunnels emit CO and NO x Exhaust gases such as smog and smog are dangerous to human health and driving safety. Therefore, the ventilation system in road tunnels is one of the indispensable auxiliary projects, which directly affects the construction investment and the environment and operation safety in the tunnel. [0003] According to the tunnel length, slope and traffic volume, the conventional ventilation methods of domestic highway tunnels include natural ventilation, full-jet longitudinal ventilation, and vertical / inclined shaft segmented longitudinal ventilation. Vertical / inclined shaft sectio...

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Problems solved by technology

However, the disadvantage of this complementary ventilation method is that the complementary air duct can only realize the air exchange between the two pipes of the tunnel, and cannot be used for smoke exhaust in the event of a fire. Therefore, the fire smoke has a long path, which is not good for the safety of tunnel operation.

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