Ventilation, smoke discharge and evacuation system for underwater single-tube double-layer shield traffic tunnel

Abstract

The invention discloses a ventilation, smoke discharge and evacuation system for an underwater single-tube double-layer shield traffic tunnel. The ventilation, smoke discharge and evacuation system comprises an upper-layer lane, a lower-layer lane, a jet fan and a wind tower. An axial flow fan is arranged in the wind tower. A sector space on one side face of a round shield section of the tunnel is an independent smoke discharge channel. An escape channel is arranged in a sector space on the other side of the round shield section of the tunnel. A staircase connected with the upper layer and the lower layer is arranged in the escape channel. An upper-layer front room is arranged between the staircase and a lower-layer escape door. A lower-layer front room is arranged between the staircase and an upper-layer escape door. Positive pressure fans are installed on the wall shared by the upper-layer front room and the staircase and the wall shared by the lower-layer front room and the staircase respectively. The upper end of the side wall of the tunnel is provided with an upper-layer smoke outlet and a lower-layer smoke outlet. The upper-layer smoke outlet and the lower-layer smoke outlet are respectively provided with an automatic smoke discharge fire damper. By means of the ventilation, smoke discharge and evacuation system, fire smoke can not diffuse between the upper layer and the lower layer, the visibility of the escape environment is good, the escape environment is not invaded by the smoke, personnel evacuation is efficient and quick, escape time is greatly shortened, personnel casualties are reduced, construction is safe, and later-period maintenance is easy.

Description

technical field [0001] The invention relates to the field of ventilation and smoke exhaust and personnel evacuation of underwater traffic tunnels, in particular to an underwater single-pipe double-layer shield traffic tunnel ventilation and smoke exhaust and evacuation system, which is suitable for tunnel fire accidents with super large underwater sections. Background technique [0002] With the rapid development of transportation, tunnel technology has been continuously improved, and various tunnels have been continuously built. A large number of traffic tunnels meet the traffic needs in various terrains and bring great convenience. In the construction and maintenance of tunnels, fire is an emergency that must be carefully considered, and preventive and countermeasures must be established. Although a tunnel fire is a small probability event, once it occurs and cannot be controlled effectively in time, it will cause tragic casualties and huge economic losses. At present, w...

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Problems solved by technology

However, due to the limited space on the upper and lower floors of the single-tube double-layer shield tunnel, the design of smoke exhaust and personnel escape and evacuation faces greater difficulties.

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