针对长大地铁过海区间隧道通风排烟问题，结合青岛地铁1号线瓦贵区间工程，采用理论及对比分析、数值解算等方法，分析过海区间隧道区间风井设置、火灾工况气流组织等问题。介绍青岛地铁1号线瓦贵区间概况，然后提出区间风井设置的要点，参考国内相关城市过江工程实例，采用土建排烟风道，以保证灾害工况下两车追踪人员的疏散安全。阐述陆域段防排烟和海域段防排烟方案，对于陆域段，排烟方案可以按照常规地铁区间进行设置；对于海域段，需根据区间长度，采用全吊顶或者局部吊顶排烟方案。通过研究区间火灾安全目标，设定热释放功率为10 MW，隧道临界风速为2.1m/s，重点排烟量为80 m3/s，并绘制通风网络解算结果图，解算结果表明各风井区间的防排烟系统均满足规范要求。

Some technical problems that include long-subsea tunnel ventilation and smoke exhaust, fire escape and evacuation are found due to the rapid development of tunnel construction technology and the fact that the subway tunnels construction have become more complicated with longer length. Shaft and smoke extraction in long-subsea subway tunnels are expounded with the Wagui tunnel in Line 1 in Qingdao as a case by using theoretical analysis, contrastive analysis and ventilation network calculation methods. The reasonable and feasible ventilation and smoke extraction that can ensure tunnel safety operation and can provide a reference for the follow-up related project is put forward. By studying the fire safety target, the heat release power is set to 10 MW, the tunnel critical wind velocity is 2.1 m/s, the smoke emission is 80 m3/s, and the results of the ventilation network are plotted. The solution shows that each smoke control system of the ventilation meets the requirements of the code.

U231.5