Study On Safety Evacuation In Metro Tunnel

In the past few decades,urban transportation systems are built increasingly developed and diverse.Underground,as an essential part of urban mobility,never fails to attract the public's attention for its capacity,convenience and saving of the land-use.However,while being benefit from the easy,we the engineers still be aware of the risk of Underground Fire.Just as its name indicated,the entire urban underground system is built under the ground.The internal structures are relatively narrow and complex,resulting in the worse ventilation,smoke control/extraction and illumination.Once accident happened and fire broke out,the temperature in the tunnel might rise rapidly while the smoke could be hard to be extracted.Moreover,it is not that easy for the passengers to find the emergency exits under this circumstance.Operating underground once caught on fire,mass casualties could be caused,having serious negative impact on the whole society.Therefore,it is essential to study the Safety Evacuation of Underground in Fire Emergency.The article is considered that the train is forced to dock in the interval tunnel when the fire occurs,and then the best strategy of evacuation of the tunnel personnel is studied,which will provide theoretical guidance for the escape of the tunnel.The author analyzes the relationship between the characteristics of personnel and the degree of cognition and behavior response of tunnel evacuation facilities through the questionnaire survey of the degree of cognition and evacuation of orbital evacuation facilities in Chongqing undergraduates.The survey results show that the respondents have received 71% of the fire escape training or fire safety education.This shows that the university education is paying more attention to the fire safety education.The school education is the main reason for college students to receive fire escape training or safety knowledge education.And 74% of the respondents were not aware of the fire fighting facilities of the train fire control system and the subway tunnel.Only a small number of people knew about the fire extinguisher,the train emergency button and the tunnel connection channel.Most people know the specific location of the fire extinguisher,but only 12% of skilled fire extinguishers need to strengthen fire fighting equipment training.Most of the investigators chose to escape from the side door,and only 30% of the selected trains were evacuated.Gender,undergraduate or graduate students in the impact of personnel evacuation plays a significant role.With a virtual tunnel,the use of Pathfinder analysis,the train in different fire conditions under the evacuation program,to explore the best program.Train the front of the fire,the best evacuation program to open the train door and near the fire site of the side door 1-2 fan,guide the front of the passengers through the door through the front door to the front door to escape and through the side of the evacuation platform to the front contact Door escape;the train in the rear of the fire,the best evacuation program to open the train door and near the fire site of the side door 3-4 fan,guide the rear of the passengers through the end of the door to the rear side of the platform to escape and through the side door Evacuate the platform to escape to the back-end platform.Select a physical tunnel,the use of FDS fire simulation software,the subway vehicle in the event of a fire,in the channel with a channel to evacuate the scene evacuation simulation scenarios to verify the evacuation plan.