Abstract:

Due to the narrow and closed tubular space structure of highway tunnel, once there is a fire caused by traffic accidents, it will pose a serious threat to the safety of people in the tunnel. Based on FDS software,the changes of temperature, CO concentration and visibility in the tunnel under different fire scenarios were analyzed. Pathfinder software was used to simulate the evacuation process under different vehicle congestion density, evacuation direction and evacuation number, and the evacuation time as well as its influencing factors were analyzed. Through the study, the law of smoke diffusion under different fire scenarios is obtained, and the safety of evacuation is judged and evaluated.  

Key words: highway tunnel, smoke diffusion, evacuation, FDS