Combination of horizontal and vertical air supply breathing zone collision air supply tunnel fire escape system

Abstract

The invention discloses a horizontal and vertical air supply combined fire escape system capable of realizing a collision effect in a breathing zone and an air supply tunnel. The horizontal and vertical air supply combined fire escape system comprises static-pressure tanks, air supply pipes and smoke screens; the static-pressure tanks are arranged in the wall of the tunnel and are connected with the air supply pipes; first nozzles are arranged at lower ends of the static-pressure tanks, and second nozzles are arranged on side surfaces, which are close to the tunnel, of the static-pressure tanks; each first nozzle discharges air in the horizontal direction, and each second nozzle discharges air in the vertical downward direction; the vertical smoke screens are fixed to side walls, which are close to one side of the tunnel, of the second nozzles; lower edges of the static-pressure tanks are flush with upper edges of the smoke screens, and upper edges of the first nozzles are flush with lower edges of the second nozzles; and the air supply speed of each first nozzle is 0.3m / s, and the air supply speed of each second nozzle is 0.7m / s. The horizontal and vertical air supply combined fire escape system has the advantages that jet flows sprayed by each two corresponding nozzles are collided with each other in the breathing zone for escape personnel, so that a fire escape channel which penetrates the integral tunnel can be formed; and the tunnel excavation volume is obviously reduced, and only the static-pressure tanks need to be arranged at corners of the tunnel.

Description

technical field [0001] The invention relates to a tunnel fire escape system, in particular to a tunnel fire escape system in which the breathing zone collides with the air supply combined with horizontal and vertical air supply. Background technique [0002] Tunnels are the product of the rapid development of modern cities. Since the second half of the 20th century, the urban areas of various countries in the world have gradually expanded, and the urbanization process has gradually accelerated. This accelerated urbanization process has led to the need for urban traffic with a large transportation volume, fast speed, low energy consumption, and low pollution. , Urban transportation with a small footprint. Tunnel Jiangxi Copper was conceived and born during this period. As an advanced means of transportation, tunnel has incomparable advantages compared with traditional transportation methods. However, with the development of tunnel traffic, vicious accidents such as tunnel ...

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Problems solved by technology

This will lead to two problems: First, although the average concentration in the tunnel as a whole has decreased, due to the continuous release of smoke from the fire source, this part of the smoke cannot be completely eliminated, which will result in still relatively high concentrations of smoke in the tunnel. high concentration of smoke

Second, although the average concentration in the overall tunnel has decreased, there is still a relatively high concentration of fire smoke locally

In this way, when the tunnel is excavated, it is necessary to reserve or re-excavate the upper and lower spaces of the tunnel at the same time, which occupies a large space and the amount of secondary excavation is too large, resulting in difficulties in implementation.

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