Simulation Research Of Pedestrian Evacuation In Subway Station Emergencies Based On AnyLogic

In recent years,the mileage and passenger flow of China’s subway operations have been increasing,and the large number of subway passengers usually leads to a large number of pedestrians gathering in subway stations,while most subway stations are located deep underground,which is a relatively closed place,and a variety of factors interact with each other to make subway stations a high incidence of emergencies.Once an emergency occurs in a subway station,it is very easy to cause congestion and trampling in the station due to the special nature of the station,which can lead to secondary accidents and more serious impacts.This not only brings great impact to the subway train operation,but also seriously threatens the personal safety of pedestrians in the station.Therefore,it is important to analyze the factors influencing the evacuation of pedestrians in subway stations,study the evacuation rule of pedestrians in metro stations,and design evacuation methods to shorten the evacuation time and relieve the evacuation pressure.This thesis takes the TIYUCHANG Station of Xi’an Metro Line 2 as the research site and conducts the research from the following aspects:(1)Investigation and statistical analysis of the basic characteristics of pedestrians in subway stations and the response behavior of pedestrian evacuation in emergencies by means of a questionnaire survey.Binary logistic regression was used to analyze the effects of seven factors: namely gender,age,education,health status,familiarity with subway stations,whether they had learned about evacuation,and whether they had participated in evacuation drills,on pedestrian evacuation responses to subway stations in case of emergencies.(2)Based on the original social force model,an improved social force model was proposed to simulate the pedestrian evacuation of the Xi’an Metro Line 2 TIYUCHANG Station in an emergency.The plan diagram of the TIYUCHANG Station is drawn by field measurements,and then AnyLogic simulation modeling is performed for the emergency pedestrian evacuation of the TIYUCHANG Station.An optimized evacuation method based on the improved social force model is proposed,and the pedestrian evacuation time,the number of remaining pedestrians in the station,and the evacuation pressure of the safety exit are selected as the three indicators of pedestrian evacuation to evaluate the effect of the optimized evacuation method.(3)The simulation model is run under the scenario of no train arrival,and the risk areas of congestion at the station hall level and platform level of the TIYUCHANG Station are judged according to the regional pedestrian density.The pedestrian evacuation effects of the two basic evacuation methods and the optimized evacuation method based on the improved social force model were evaluated in two simulation scenarios by three indexes: pedestrian evacuation time,number of remaining pedestrians in the station and number of pedestrians evacuated from the safety exit,and the evaluation indexes of the optimized evacuation method were verified to be better than the other two evacuation methods.By comparing the pedestrian evacuation time,the staggered arrival of opposite trains helps to relieve the pedestrian evacuation pressure.Based on the analysis results,suggestions are made to improve the efficiency of pedestrian evacuation in the TIYUCHANG Station from three aspects: subway company operation,subway station management and pedestrian awareness.