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地铁排烟系统的作用是当地铁发生火灾事故时,能提供有效的排烟手段,为乘客和消防人员输送足够的新鲜空气,形成一定的风速,引导乘客迅速撤离现场。西安地铁二号线行政中心站在站厅层中部设置公用大厅,在大厅中央设置采光顶,站厅与站台之间设置通透的天井。由于车站中板上开设大面积的孔洞,相当于使站厅与站台连通,通过计算设置防排烟措施,满足站台和中庭发生火灾时人员疏散的要求。1工程概况
Subway exhaust system is the role of the subway in the event of a fire accident, it can provide effective means of smoke, passengers and firefighters to deliver enough fresh air, the formation of a certain wind speed, guide passengers quickly evacuated from the scene. Xi’an Metro Line 2 Administrative Center station in the middle of the station hall set up a common hall, set the central lighting in the lobby, the station hall and the platform set between the transparent patio. As a large hole in the middle plate of the station is opened, which is equivalent to connecting the station hall with the platform, and the smoke exhaust prevention measures are provided through calculation so as to meet the requirements of personnel evacuation when a platform and atrium fire. 1 project overview