Research on Underground Space Application of Multi-storey Complex Structure Based on Agent-Base Continuous Model

Abstract The fire emergency evacuation in a transfer station, with complicate structure and large number of passengers, is more difficult than that in a single subway station. A three-storey subway transfer station with cross type and island-side transfer form was selected as the research object. Through a field investigation, it was determined that there were 368 occupants should be evacuated in B3 platform and 212 people in B2 platform. And the proportion of adults attached 84%. An agent-based egress simulator was adopted to investigate the effect of different evacuation schemes. Results show that the optimal scheme is to change the arrival field for stair 1 and the stair 4 at the both ends of B3 platform to the concourse in B1 layer directly. In addition, fire curtains on B2 should land to an occupant height in the early stage of evacuation and then fall down to the floor after 240 s. It could improve the evacuation efficiency of the B2 and the B3 train fire, and the evacuation time is decreased by 110 s and 20 s respectively. This study would be helpful for safety evacuation design in a transfer station.