无活塞风亭地铁车站隧道通风系统方案

针对周边条件受限地铁车站进行取消活塞风井分析研究,结合广州某线路建立模型,利用SES程序对取消活塞风井车站前后区间正常、阻塞、火灾工况及影响因素进行模拟计算分析。分析得出如果取消车站所有活塞风井,在车站配置两台轨排风机,且轨排风机风量不小于60 m3/s时,利用前后车站隧道风机和该站轨排风机组织气流,正常、阻塞、火灾工况的模拟计算结果均能满足规范要求。实际应用时,需考虑线路客流对区间隧道温度的影响,必要时需采取降温措施。

Discussion on the Tunnel Ventilation System Plan for the Cancelled Piston Air Shaft of a Subway Station

In this study,the piston of the air shaft in a restricted subway station is cancelled.A model of a Guangzhou metro line is built through the simulation analysis of the normal/block/fire-operating models and the influencing factors of the front and back interval tunnels of the cancelled piston air shaft of a subway station.Subway Environment Simulation software was used for this purpose.If all the position air shafts of the subway station are cancelled,the station is equipped with two exhaust fans,and the airflow velocity at the exhaust blower is not less than 60 m3/s.Using the front and back station tunnel fans and the station exhaust fan to set the appropriate airflow,simulation results under normal blocking fire conditions can be obtained to meet the specification requirements.The effect of line passenger volume intensity on tunnel temperature should be considered for practical application,and cooling measures should be adopted if necessary.