Study on smoke movement for a fire in a metro depot throat area with different side wall heights

Abstract

Abstract The throat area is an important part of the metro traffic that connects the metro depot and the mainline tunnel. The throat area of 37500 m2 was conducted to investigate smoke movement. The influence of side wall height on smoke movement was considered by combining the theoretical analysis with numerical results. Six sidewall heights including 0 m, 3 m, 5 m, 7.5 m, 9 m, 10 m were designed. The sidewall would have a little impact on free diffusion of smoke when the height of the side wall is lower than 7.5 m. Smoke movement may be affected by the adjacent wall, forming the phenomenon of smoke accumulation when the side height is 7.5 m. It should be considered to expand the openness of the side wall or add mechanical auxiliary smoke exhaust equipment in a local position. This work may provide an engineering reference value for fire smoke control in the throat area of the metro depot.