Self-air curtain system with platforms for reducing air invasion amount of horseshoe-shaped tunnel

Abstract

The invention relates to a self-air curtain system with platforms for reducing the air invasion amount of a horseshoe-shaped tunnel. The self-air curtain system comprises an air guide-in plate, an airduct body bottom cambered surface structure, an air duct body top cambered surface structure and a cambered surface air guide-out plate. The two sides in the tunnel extend inwards to form the platforms. The two ends of the system are connected to the platforms in the tunnel. The air guide-in plate and the air duct body bottom cambered surface structure are sequentially connected to form a lower integrated structure. The air duct body top cambered surface structure and the cambered surface air guide-out plate are sequentially connected to form an upper integrated structure. According to the self-air curtain system, each cambered surface forming an air duct has a specific curve form, and through the specific cambered surface air ducts, the air ducts can change the direction of air enteringfrom the air guide-in plate with low resistance, and a directional air curtain which is opposite to the air inlet direction of the tunnel and has a certain inclination angle is formed. The self-air curtain system is simple in structure and extremely high in reliability, external input energy is not needed, meanwhile, the high-load operation of a tunnel heat preservation system is avoided, and thechance of accidental dangers is reduced.

Description

Technical field

[0001] The invention belongs to the field of tunnels and underground engineering ventilation engineering, and in particular relates to a self-air curtain system for a horseshoe tunnel with a platform to reduce air intrusion. Background technique

[0002] There are two types of problems in tunnels and underground engineering ventilation projects: First, how to use reasonable air organization to quickly and efficiently discharge harmful substances such as dust particles and fire smoke generated by human activities or accidents in the tunnel out of the tunnel; second, How to make the outdoor air that is not conducive to the environment in the tunnel invade the tunnel as little as possible through reasonable air organization. For tunnels in cold regions such as northeast and northwest of my country, cold air intrusion into the tunnel causes freezing cracks in the tunnel lining and freezing of equipment and facilities, which make the tunnel unusable. Therefore, organiz...

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