地铁车站利用轨顶风道排热排烟的相关问题探讨
Discussion on issues related to use of track-top air ducts for heat and smoke exhaust in subway stations
摘要：
从地铁轨顶风道基本功能出发,通过文献调研、测试研究的方式,探讨了能否取消轨顶风道,以及取消轨顶风道对排烟和排热的影响。研究得出:站台轨行区是列车火灾时疏散救援的首选地点,涉及人员疏散和防灾安全,应采用横向排烟方式;车站轨行区温度受多方面因素叠加影响,应保留车站排热系统,以应对列车远期运行时轨行区温度升高的压力;土建轨顶风道作为永久性工程,充分利用了轨行区上部富余空间,可同时兼顾排烟和排热的需求,具有其他方式无法比拟的优势,应作为车站排烟、排热的首选方案。
Abstract：
Starting from the basic functions of the track-top air duct of subways, this article explores whether the track-top air duct can be eliminated and the impact of canceling the track-top air duct on smoke and heat exhaust through literature research and test research. The study concludes that the platform track area is the first choice for evacuation and rescue in case of train fire. When it comes to personnel evacuation and disaster prevention safety, the horizontal smoke exhaust method should be adopted. The temperature of the station track area is affected by the superposition of many factors. The station heat exhaust system should be retained to cope with the pressure of increased temperature in the track area during long-term train operation. As a permanent project, the civil track-top air duct makes full use of the abundant space in the upper part of the track area and can meet the needs of smoke and heat exhaust at the same time. It has advantages unmatched by other methods and should be the preferred solution for smoke and heat exhaust in stations.
Keywords:subway station; track-top air duct; track area; train fire; smoke exhaust; heat exhaust