Abstract: Aiming at the transverse and longitudinal evacuation mode of urban tunnel, the evacuation model is built by Pathfinder. The evacuation movement time and occupation time of each channel are calculated. Combined with a field test, the influence of the transverse channel with large capacity on the nearby evacuation slides/stairs is analyzed. The influence of different evacuation modes on the evacuation is further explored. The results are as follows: The combination of transverse and longitudinal evacuation allows longer spacing distance of transverse channels while ensuring the evacuation efficiency, thereby reducing the construction risk and cost. Compared with the pure longitudinal evacuation, the evacuation time of most scenes can be shortened by adding transverse channel, and the combination of transverse and longitudinal evacuation is more friendly to special populations and has stronger universality of evacuation. The ability difference of each channel near the evacuation personnel will affect the tendency of the evacuation channel, resulting in the differences of channel occupation time, and evacuation guidance like emergency broadcasting could be useful.

Key words: urban tunnel, evacuation, evacuation simulation, transverse and longitudinal evacuation, channel occupation time