Research On Regulable Bottleneck Of Large Flow In Urban Rail Transit Station

With the rapid development of urban rail transit network in our country,the large passenger flow impact constantly during the station operation.The mismatch between equipment facilities and transit streamline layout,and passenger flow has been exposed,which would cause traffic congestion and retention.In general,it is considered that the bottleneck of the station is harmful link,and it must to relief and eliminate.However,we ignore the principle of the station operation——Safety.And it's hard for a completed station to transform the equipment facilities and station structure.Therefore,how to understand the bottleneck problem of the rail transit station with large flow,and it is of great significance to take reasonable measures to ensure the safety of the station operation.Based on the above problems,this paper presents a new definition-Regulable Bottleneck.Security and AG is considered as the regulable bottleneck.Safety is the principle of the station operation,and we should consider the platform capacity during the large flow period.Based on the System Dynamics to establish a feedback system,using the regulable bottleneck to control traffic flow,to achieve the flow equilibrium in the whole station system.First of all,this paper put the urban rail transit station as the research object,discusses the research theory and methods of the station bottleneck on the basis of the advanced experience inland and abroad.The passenger flow characteristics,the plow investigation method and the classification and characteristics of the station equipment and facilities are analyzed.This paper redefines the bottleneck of the urban rail transit station,and analyze the characteristics of static and dynamic bottleneck.Secondly,the regulable bottleneck is defined by considering the platform capacity.Queuing theory and method is specified,using in station bottleneck and calculation method and steps of static bottleneck are analyzed.The regulation method of dynamic bottleneck is also analyzed.Meanwhile,the urban rail transit large flow bottleneck based on System Dynamics is established,the flow subsystem of bottleneck is analyzed combining with the Queuing theory model.According to the new difinition,the system dynamic feedback is built using Vensim to simulate the whole station flow system.Finally,CHAOYANGMEN Station of Beijing Subway is taken as an example to validate the model.The data from field investigation is used to build the passenger flow bottleneck system and simulate the movement model.Comparing with simulation experiment of the general state and regulation state,the passenger flow and period is contrasted by controlling the security and AG.Then,evaluating the effect based on Queuing Theory.The innovation points in this paper are following:researching the passenger control for the whole station,establishing the model based on System Dynamics,connecting relationship based on Queuing theory,and ensuring the safety of the station by regulable Bottleneck.In this way,the effect to ensure the safety of station operation will be achieved.