Modeling And Simulation Research On The Pedestrian Group Evacuation Of Urban Rail Transit Station Platform

In recent years,with the construction and development of urban rail transit,more and more pedestrians have chosen it as the main means of transportation within the city.As an important place for passengers to be distributed,urban rail transit stations are especially important for the safe evacuation of personnel during their operation.Due to the influence of the social relationship between pedestrians,it is very common for pedestrians to walk together in the station.Due to the pursuit of companionship relationship,the companion pedestrians have different walking modes and individual pedestrians,which have an impact on the pedestrian flow status.The impact during emergency evacuation cannot be ignored.At present,most of the research on pedestrian evacuation of urban rail transit regards all pedestrians as individual pedestrians,and the research on evacuation considering pedestrian group is limited.Therefore,it is necessary to study the evacuation of pedestrians accompanying urban rail transit stations.By building a companion pedestrian evacuation model to simulate its evacuation process,it provides reference and support for pedestrian evacuation at the station.Firstly,based on the video of walking with pedestrians in different areas of urban rail transit stations,this paper refines and analyzes the traffic characteristics of traveling with pedestrians.This article summarizes the common queue patterns and walking characteristics of group pedestrians and analyzes in detail the contact and communication,following,aggregation waiting and surpassing behaviors of paired pedestrians,which lays the foundation for the construction of pedestrian evacuation models that consider group pedestrians.Secondly,according to the characteristics of the accompanying pedestrians,using the Netlogo programmable simulation platform,this paper builds an urban transit platform pedestrian group evacuation model.Two evacuation modes for companion pedestrians are given.The simulation test system for group pedestrian evacuation is designed.The effectiveness of the model is verified by comparing with the actual experimental data and simulation test data of the existing group pedestrian research.Thirdly,I used the constructed urban rail transit station platform to companion pedestrian evacuation model,the influence of factors such as the initial position distribution of the pedestrians,the total number of evacuated persons,the proportion of group pedestrians,the allowable spacing of group pedestrians and the layout of evacuation exits on pedestrian evacuation were studied under the two partnering modes.By analyzing the evacuation time,the average speed of pedestrians’ evacuation and the average waiting time of pedestrians,we can get the change rule of pedestrians’ evacuation under different factors.The results show that the evacuation time and average evacuation speed of the two companion modes are insensitive to the pedestrian’s initial position distribution.The evacuation time of the two companion modes increases with the increase of the total number of evacuation,increases with the proportion of companion pedestrians and decreases with the increase of the allowable distance of companion pedestrians.The total number of evacuees has a significant effect on the evacuation time.The layout of the evacuation exits in the middle of the platform is more conducive to pedestrian evacuation.Finally,this paper uses the pedestrian evacuation model to simulate the pedestrian evacuation process of Xizhimen Station and Zoo Station of the subway at the peak of the working and non-working days.It compares the difference between the evacuation process of the whole single person and the group pedestrian.Analyze the evacuation of the two stations and give evacuation suggestions.