Simulation Study On Evacuation Of Rail Transit Stations In Taiyuan City

As a key node for the passenger flow distribution of the rail transit system,the station is under huge passenger flow pressure.How to ensure that passengers can pass safely,efficiently,quickly and comfortably within the station has an important role in maintaining the smooth operation of the entire rail transit system.The rail transit system of Taiyuan City has been in operation since the end of 2020,a field investigation on the passenger behavior characteristics of its traffic stations were conducted;combining with the literatures,the general characteristics of passenger movement and passenger decision-making factors were summarized.Changfeng Street Station with larger passenger flow was selected for evacuation simulation to evaluate the risk vulnerability under the normal operation status and evacuation situation,and targeted improvement suggestions were put forward.The main research contents are as follows:(1)Through surveys and conclusions,passenger behavior characteristics were analyzed.The influence of passenger behavior characteristics on the distribution of passenger flow and the quantity of passengers in the station were analyzed.The factors affecting the quantity of passengers in the paid and non-paid areas of the station were studied,and the locations where people tend to gather in the station were clarified.(2)Through the investigation of turnstiles,passages,inter-floor facilities and platforms,the passenger traveling speed in each scene of the station were counted.The main influencing factors of passenger behavior in each scene were analyzed.The passenger distribution characteristics of each scene were summarized.A model of the influence of factors such as passenger speed and distribution on the congestion in the station was established.(3)According to the variation of the speed in the crowded areas of the station and the decision-making behavior of the passengers on the inter-floor facilities,considering the influence of herd behavior,panic coefficient and passenger flow density on passenger expected speed,a social force model for passenger evacuation at the station was established,and the interaction logic of the multiple exit choice of the passengers was improved.(4)Taking the Changfeng Street station in Taiyuan as a case,the above model were used to establish a passenger flow evacuation model based on the physical structure of the station.The evacuation simulation was carried out with Anylogic software.The number of passengers remaining,the change of passenger flow and the evacuation time in the stations where the trains arrived at the same time,failed to arrive and arrived at the staggered peak on both sides were compared.The nodes that might cause problems were pointed out and reasonable suggestions were put forward.This research provides a reference for the actual operation and management of Taiyuan rail transit.