为了解决长度超过100 m的地铁出入口的消防疏散问题，通过分析《建筑设计防火规范》等消防规范中安全出口的定义，对比《地铁设计规范》等国家标准及北京市《城市轨道交通工程设计规范》等地方标准中关于长度超过100 m出入口消防疏散相关的条文及条文解释，并对目前国内部分城市在实践中采取的具体措施进行综合分析比较。经研究，认为解决超长出入口消防疏散的方案主要有： 1）设置疏散楼梯间； 2）在通道长度不超过100 m处设置分支通道； 3）在通道内设置自动喷水灭火系统； 4）加强通道的防烟排烟措施； 5）将该出入口仅视为过街通道； 6）划分防火分区。对于出入口计算长度，建议统一计算至出入口通道暗埋段。

In order to meet the fire protection and evacuation requirements of the entrance/exit of metro station with length over 100 m, the definition of safety exit in Code for Fire Protection Design of Buildings is analyzed; comparison of fire protection and evacuation requirements for entrance/exit with length over 100 m is made between national standards such as Code for Design of Metro and regional standards such as Code for Design of Urban Rail Transit (Beijing);and some specific measures adopted in many cities in China are synthetically analyzed. It is concluded that main countermeasures for fire protection and evacuation of entrance/exit of metro station with length over 100 m are as follows: (1) setting up the evacuation staircase; (2) setting up branch passage at the passage with length shorter than 100 m; (3) setting up automatic sprinkler fire extinguishing system in the passage; (4) strengthening the smoke control and exhaust measures of the passage; (5) regarding the entrance/exit as a crossing passage only; (6) dividing the fire protection zones. The calculation length of the entrance/exit is recommended to the mined section.