中文摘要：

地铁车站施工过程中，当只有主体结构施工完成，消防、通风和其它防护措施尚未安装时，一旦发生火灾，会对人员疏散造成严重影响。针对上述问题，以某地铁车站为例，研究上述条件下发生火灾时温度和烟尘的分布情况，及烟筒效应和抽吸作用对分布的影响，并制定人员疏散方案。研究使用FDS软件，根据该车站的具体条件建模，在车站主体6个代表性位置设置火源。模拟火灾发生后300s内这些位置分别起火后烟尘扩散速度及到达疏散通道的时间，以及这5个疏散通道出口处温度随时间的变化规律。研究结果表明，在火灾过程中，烟筒效应和抽吸作用比较明显。温度在前100S剧烈上升，200S～300S缓慢波动上升，趋于稳定，最高温度为250℃，最低温度为20℃。从烟尘流动和温度变化来看，在临界温度内施工人员有足够的疏散时间和空间，进而可制定相应的施工人员疏散方案。

英文摘要：

In the construction process of subway station, when only the main structure of the station is completed, while its fire control, ventilation and other protective measures are not installed yet, fires will severely influence the personnel evacuation. Taking the Hongqi West Road Station of Dalian Metro Line 2 as the study case, this study analyzed the temperature distribution, smoke distribution, as well as the influence of chimney effect and suction on the distribution during fires. Based on FDS （fire dynamics simulator） and station＇s actual conditions, simulation models of the fires were set up and six fire source points in the station were set. For the first 300s of the fire, the smoke diffusion velocity and time that smoke reaches the evacuation channel, and the law of temperature variation with time at the exits of the five evacuation channels, were simulated. Results show that the chimney effect and suction action are obvious. Temperature sharply increases in the first 100s, slowly fluctuates and rises during 200 s - 300 s, and then s to be stable, with the highest temperature is 250 ~C and the lowest temperature is 20 ℃. In view of the smoke flow and temperature change, construction personnel have enough time and space to evacuate in the critical temperature,, and thus corresponding construction personnel evacuation plan could be made.