Hot smoke test in a subway tunnel in Korea

초록

In Korea, subway tunnels should be equipped ventilation fans which might control smoke when fire is occurred in a tunnel. Anyway Seoul metro 9 have started serviced from May 2009 and the hot smoke test was done in a subway tunnel of metro 9 when the subway has just opened before. The tunnel is connected between Nodeul and Heukseok stations. Alcohol pans with the cross-section of 2.77 m2 and 4 smoke generators of about the volume flow rate of 1000 m3/min are used for generating hot smoke. Emitted energy from alcohol pans is reached about 1 MW. The ventilation fans equipped with the tunnel are successively run 9 min after smoke generation. It is verified how hot smoke is controlled by fans. Three sections of the tunnel are selected and air flow direction, velocity, temperature and transmittance are measured and analyzed for smoke control performance of the tunnel with fans and analyzed from the fire-safety-point of view. Velocity of smoke flow is obtained by using measured velocities at the ceiling of the tunnel. The time when smoke-control flow is built up is different for the different positions. Velocity distributions at various positions can be used for the boundaries and the comparison data of numerical estimations