Simulation Optimization Research On Emergency Evacuation Of Urban Rail Transit Hubs

With the development of the city,rail transit plays an increasingly important role in people's travel.Compared with foreign countries,China's rail transit development started late,and has less experience in emergency management.Different from other types of transportation hubs,Yingkoudao junction station of Tianjin Rail Transit studied in this paper is an underground confined space,which is run through by line 1 and line3.The station is located in the downtown area of Tianjin,surrounded by shopping malls,schools and office buildings.With the continuous improvement of Tianjin Urban rail transit system,more and more people choose to travel by subway,Once an emergency occurs,reasonable emergency evacuation management can effectively improve the efficiency of crowd evacuation and reduce the loss of life and property caused by the emergency.Therefore,it is necessary to study the emergency evacuation of Yingkou hub station of Tianjin Rail Transit.In order to better study the emergency evacuation of Yingkoudao hub station,this paper first analyzes the research status of relevant fields at home and abroad.By summarizing the characteristics and functions of traffic system modeling and simulation,this paper makes a theoretical basis for the modeling and Simulation of this paper.Based on the theory of pedestrian movement characteristics and evacuation scene characteristics,as well as the research status at home and abroad,the influencing factors of emergency evacuation are analyzed.After the comparison and selection of crowd evacuation dynamic models,the social force model is finally selected as the crowd dynamics modeling method in this paper.Based on the relevant data obtained from the field survey,the plane layout of Yingkoudao junction station is drawn.The station is composed of three floors,including platform layer of line 1,station hall floor and platform layer of line 3.Through the analysis of facility layout and service process of each floor,the two-dimensional and three-dimensional simulation models of Yingkou Road junction station are established with the help of anylogic pedestrian library The pedestrian and train operation logic of Yingkou Road junction station are calculated.Based on the daily operation status,this paper designs the emergency evacuation logic of Yingkoudao junction station and carries out multiple operations.With the help of pedestrian density map,it is found that there are bottlenecks at stairs and gate passages in the process of evacuation.Through in-depth analysis of pedestrian density map,the emergency evacuation optimization scheme of Yingkoudao junction station is formulated,and the optimization effect is analyzed.The results show that the optimized Yingkoudao hub station simulation model meets the national 6-minute evacuation standard for rail transit hub station.