Study On The Impact Of Metro Guide Railing On Emergency Evacuation And Its Setting Optimization

During the peak period of passenger flow,in order to prevent the occurrence of passenger congestion and other accidents,many subway stations have set up guide railings inside and outside stations to regulate passenger inflow and exit routes and control the speed of incoming and outgoing personnel.However,the existence of these railings have changed the passengers'original evacuation path,and have potential impact on the emergency evacuation.It has certain practical significance to study the setting of the railings.Firstly,the research status of emergency evacuation at home and abroad is elaborated,and several commonly used evacuation models are briefly introduced.Secondly,this paper summarizes the location regularity and structural parameters of diversion rails in Metro stations.The characteristics of evacuees are analyzed and studied based on the observed passenger flow data and evacuees'attribute parameters.Finally,using Pathfinder software,the simulation inquiry model of L-type entry channel and platform rail setting is established.The simulation and optimization of rail setting in L-type entry channel"|"section,"-"section and island platform layer are explored respectively.The results show that:?1?In the L-type entry channel"|"section,under the same channel length,the change of the balustrade setting has a great influence on the evacuation time,and when the length of'|'section is less than 80 meters,the optimal balustrade length based on evacuation efficiency fluctuates between 70%and 80%of the corridor length.?2?The Y₁/Y₂ value based on evacuation efficiency in the"-"section of L-type intake channel is between 0.2 and 0.3.?3?When the number of Evacuators is more than or equal to 1200,the installation of railings at the escalator of B-3 platform will have a significant impact on evacuation time,and there is an optimal length of railings based on evacuation efficiency;compared with B-3platform,the evacuation efficiency of B-2 platform is more easily affected by the setting of railings,and the railings at the escalator of B-2 platform connection building should not be set to 6 meters long.The research results of this paper have a certain reference and practical significance for the design of diversion rails in rail transit stations and other places where people are concentrated.At the same time,it further promotes the study of emergency evacuation of Metro and improves the efficiency of evacuation of metro.