Study On Evacuation Strategies In Deep Underground Space With Elevator And Stair

The stairs are an important evacuation route for safe evacuation of personnel in emergencies in deep underground space.The stairs can not afford the task of evacuation of large-scale personnel,in the case of fire,the staff prone to panic,resulting in scenes of confusion,reduce the efficiency of evacuation,And even a serious stampede accident.In addition,some special staff(the elderly,children,disabled people,etc.),it is difficult in a very short period of time through the stairs to reach the safe area.Therefore,the study of the elevator in the deep underground space in the evacuation is particularly important.In this paper,through the online distribution of the questionnaire to study of fire in the psychological,behavior and evacuation of the views of the elevator.Taking the Shapingba underground large-scale integrated transportation hub as an example,the personnel evacuation model was established by using Pathfinder software,and the influence of different evacuation strategies and elevator control parameters on evacuation time was analyzed.By analyzing the different evacuation strategies,two better schemes are obtained.One for the negative five and more than five people using all the stairs evacuation,negative five people under the use of all evacuation of the elevator,the total evacuation time is 2098.8s,the advantages of this evacuation program is easy to evacuate the induction command and operation The The other for the negative four and more than four layers of all the staff to use the stairs to evacuate,the negative four layers of personnel in accordance with the level of each elevator evacuation staff 66%,34%of the evacuation of evacuation personnel to evacuate,the total evacuation time is1942.3s,The advantages of this evacuation program for a shorter time,the use of evacuation of resources is higher.Analysis of different elevator control parameters and found that the greater the load of the elevator,the greater the maximum rated speed,the shorter the door opening time is more conducive to evacuation,and the elevator acceleration does not have much impact on the evacuation.According to the empirical formula of the existing elevator service time,considering the most important parameter arrival rate A in queuing theory,the relationship between the average arrival rate ?' and the elevator service time t in the elevator evacuation model is established by using the knowledge of queuing theory.Taking the Shapingba underground large-scale integrated transportation hub as an example,the average arriving rate ?' of the equation can be assigned to the variable other than the elevator service time t,and the equation of the elevator evacuation model in Shapingba is simulated by Matlab programming.The relationship between the rate ?' and the elevator service time t.Verify the correctness of the formula.According to this relation,the formula for solving the necessary evacuation time RSET in Shapingba elevator evacuation model is given.