Research on Evacuation of People in Quasi-Rectangular Subway Tunnel Fire Environment Based on Pathfinder Software

Based on the evacuation theory, this research proposes a calculation method of evacuation reliability suitable for subway tunnel fire. Use FDS to simulate the fire environment and Pathfinder software to simulate the evacuation plan. The results show that: compared with natural ventilation, the opening of longitudinal ventilation can ensure a safe evacuation environment for occupants upwind from the fire source, and effectively reduce the CO concentration in the tunnel, but shorten the available safety egress time. The evacuation plan is not feasible when the load factor is 100%. When only the side door of the second carriage is opened, the evacuation time of personnel toward the two-sided platform must be the shortest. But the plan is still not feasible. The evacuation plan is feasible when the load factor is 55%. Compared with the evacuation plan toward the platforms on both sides, the evacuation plan toward the platform on the fresh air side has higher evacuation reliability.