Research On Emergency Evacuation Of People In The Scenario Of Sudden Fire In Metro Station

The construction space of subway stations is narrow and closed,and most of the construction sites are close to shopping malls and arterial traffic roads.During peak hours,there are complicated pedestrian traffic and various unreasonable management phenomena.At the same time,the automatic fire alarm system and the ventilation and smoke exhaust system of the station have not been officially put into use.The high temperature,smoke and toxic gas generated by the sudden fire will make the evacuation of construction personnel more difficult and easy to cause casualties.Therefore,the emergency evacuation of people in the event of a sudden fire during the construction of a subway station has become a topic that needs to be studied urgently.(1)Investigate the construction site environment of some subway stations in Xi’an,establish a subway station model of the construction scenario,and set the specificity of the Wenzhong subway station model based on the actual situation,that is,some entrances and exits are close to shopping malls with large traffic and close to the main traffic roads.Reduce the evacuation speed of some exits,and simulate the obstacles to evacuation under the peak of pedestrian flow and vehicle flow.(2)Refer to the general situation of subway station construction projects,simulate the layout of facilities and equipment and specific environmental parameters,analyze the psychological quality and behavior characteristics of on-site construction and management personnel under fire scenarios,and set five fire source locations to correspond to five working conditions.Use Pyrosim to simulate the development of five types of fire spread,and use Pathfinder to simulate the evacuation of people.(3)Determine the number of evacuated persons and divide them into adult males and adult females through investigation and research on construction personnel,set basic parameters of physical characteristics of personnel,and construct evacuation scenarios for subway station construction.By comparing and analyzing the results of fire simulation and evacuation simulation,analyzing and proposing optimization suggestions,it provides reference for actual construction project management.According to software simulation technology,the advantages of early design changes can be greatly reduced,combined with the subway station environmental parameters and construction personnel characteristic data obtained from field research,simulation and simulation are carried out through Pyrosim and Pathfinder software to analyze the characteristics of the evacuation law under different fire sources.Summarize the factors affecting personnel evacuation under construction fire scenarios,and propose preventive measures to reduce the evacuation time and difficulty of construction personnel,and provide references for personnel evacuation under actual construction scenarios.