Passenger evacuation and smoke extraction in underground railway Line 1 and Line 2 tunnels in Beijing

Presents the background and conditions of equipment safety retrofit for the two lines. Verifies the smoke extraction capacity of the existing ventilation and smoke extraction system by means of simulation and calculation and field test. Analyses the construction characteristics of the underground railway tunnels, presents an evacuation and smoke extraction mode that the quantity of the connecting holes from a tunnel to the adjacent one between two stations are to be increased and passengers escape from the holes in the case of fire.