南京地铁过江隧道通风系统方案研究

Research on Ventilation System Scheme for River-crossing Tunnel of Nanjing Subway

研究目的:随着国内地铁线路的增多,有时难免需要穿越大江、大河;同时随着隧道数量的增多,在隧道中发生的火灾也越来越频繁,危害性也越来越严重,隧道通风排烟系统成为日益重要的研究课题。研究结论:本文针对地铁的长大过江区间隧道,从通风系统形式、气流组织等方面详细研究了长大区间隧道的通风、排烟系统设计方案,对于同时存在多列车同向运行的长大区间隧道,当区间隧道采用大洞方案时,设置顶部风道、风口来组织隧道内的通风排烟;当区间隧道采用小洞方案时,在区间隧道上设置中间风井,利用中间风井进行通风排烟。

Research purposes： With the more and more subway built in China,some subways have to cross the big river.With the increase of tunnels,more and more fire accidents happened in tunnels that caused more serious harmfulness.Therefore,the ventilation and discharge smoke system inside tunnels becomes one of the most important research topics. Research conclusions：This paper researches the ventilation and discharge smoke schemes for the large river-crossing tunnel of subway from the areas of the form of the ventilation systemn and the organization of air flow.For the large tunnel in which the several trains run simultaneously in the same direction,when the large tunnel is design,the top air channels and top air vents should be installed for the ventilation and discharge smoke.When the small tunnel is designed,the intermediate air channels and vents should be installed for the ventilation and discharge smoke.