Experiment by using reduced scale models for the fire safety of a rescue station in very long rail tunnel in Korea

摘要

The Sol-An Rail Tunnel with 16.24 km in length has been under construction since 2000 in Korea. For an extremely long railroad tunnel, the fire-safety countermeasures should be included when designing the tunnel. This paper investigates the relationship between ventilation system and escape routes of an emergency rescue station in the Sol-An Rail Tunnel by using the reduced scale experiments. It is very important that the performance of the smoke extraction system and the safety of passengers in the rescue station are validated for emergency situations. In this study, the experiments are performed by use of thermal buoyant smoke with the 1:48 reduced scale models of the rescue station and the train. Also, the slope of tunnel is applied to the experiment. The buoyant smoke is generated through the windows of the middle cabin of the train (11 cars 1 unit) in the tunnel. The behaviors of smoke are observed under emergency operation mode of the ventilation system in the rescue station by using visualization techniques and the flow velocities at various positions in the tunnels are measured. For the case of the opened fire doors in the cross passages, the evacuation through each cross-passage in the rescue station is investigated.