Abstract: In the event of fire with evacuation channel in slow moving road tunnel, the existing specifications do not specify clear requirements for the distance between evacuation doors. Taking Chunxuan Road Tunnel as an engineering example, in case of a slow-moving road fire, the required evacuation time and the available evacuation time are compared to determine the evacuation safety and the effectiveness of the evacuation door spacing. The results showed that in the event of a fire on a slow-moving road, a fire separation wall of 2 hours and Class A fire door could separate the slow-moving road and the car lane into two fire compartments and use the car lane as a safety zone. There were refugees before and after the fire source, and people could not bypass the fire source. Ventilation and smoke evacuation are not performed during ventilation to prevent smoke from accumulating at the opposite side and jeopardizing the safety of pedestrians. Smoke spreads freely. When the distance between the evacuation doors is 250 m and the fire source is facing the evacuation door, the safety evacuation requirements are not met. For that distances of 200 m and 150 m, it meets the requirements for safe evacuation. considering safety and operating costs comprehensively, it is recommended to set the evacuation doors for slow moving roads at 200 m intervals.

Key words: slow-moving road, numerical simulation, evacuation, distance between evacuation doors