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

Abstract

The invention discloses a double-line tunnel with a vertical shaft smoke exhaust combined with a complementary ventilation system, comprising a double-line tunnel, a complementary connecting air duct and a smoke exhaust shaft arranged between the double-line tunnels; an axial flow fan is arranged in the connecting air duct It is used for airflow organization between double-lane tunnels; an axial flow fan is installed in the smoke exhaust shaft; an air duct is provided at the bottom of the shaft to communicate with the up and down tunnels, and a pair of electric air valves are installed in the air duct; the electric fan of the air duct at the bottom of the shaft is installed in non-fire The valve is fully open for natural ventilation; in case of fire, close the electric air valve of the air duct at the bottom of the shaft on the non-fire side tunnel and the air valve and axial flow fan in the complementary contact air duct, and open the axial flow fan in the smoke exhaust shaft for fire exhaust. cigarette. The two-line tunnel of the present invention performs complementary ventilation through the connecting air duct, which can reduce the engineering volume of the ventilation system and the power supply and distribution system, and the smoke exhaust shaft is used for smoke exhaust during fire and natural ventilation during non-fire, thereby reducing the corresponding shaft scale and Reduce project cost, improve operational energy saving and disaster prevention capabilities.

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...

AI Technical Summary

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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