Study On The Escape Of Personnel From Fire And The Setting Parameters Of Communication Channels In Subway Tunnel Fire

It’s more and more important of the safety of subway tunnel operations with the development of urban rail transit in China.Once a blaze occurred,the personnel escape with long distance and high risk will be a big problem.At present,a number of studies have been conducted in the world on the evacuation of people in subway tunnel fires.Their Judging conditions of people safety are a threshold according to the temperature,CO concentration and visibility which are inconsistent with the actual situation.In this article,a new model about the personnel injury risk based on the Crane revised model and FED death model is proposed with the collective effect of injury of temperature and CO considered.First,in this article,a typical scene of the subway tunnel fires is setted,and the longitudinal wind velocity should be at least 2.8m/s by considering the smoke field,temperature field and visibility field with different longitudinal wind velocity and smoke exhausting by the numerical Simulation using the software FDS.Then,According to the Judgment conditions for the death of people by the collective effect of injury of temperature and CO,the available evacuation time for people safety by considering the comprehensive judgment conditions and survival time for people in passenger compartment with different doors opened and with or without longitudinal airflow,on lateral evacuation platform and on roadbed after the outbreak of the fire.At last,according the results above,the design parameters can be provided by calculating the people movement time using the people evacuation movement time formula which is simplified by Kikuji Togawa.By simulating and verifying the people safety evacuation value of the service channel parameters in different evacuation ways using the Pathfinder,the suggested value of service channel parameters in different evacuation ways can also be provided.