Abstract: Underground two-level island platform stations widely existed in urban rail transit system. In order to analyze the relationship between the evacuation time and the character of passenger flow, the capacity of main evacuation facilities and the evacuation bottleneck of stations are studied, and groups of sensitivity analysis experiment are designed. The variability of the evacuation process is analyzed by comparing the output of each simulation model in a group and between groups. The simulation result shows that the station evacuation time increases within a certain limit at peak hour. And the station evacuation time is mainly affected by the number of pedestrians in the platform at the beginning of evacuation. The methods for studying the relationship between passenger flow character and evacuation time are provided, and which can be a reference for the emergency evacuation organization.

Key words: evacuation, underground two-story island platform station, sensitivity analysis, passenger flow character, equipment passing capacity