Study On Urban Rail Transit Routing Mode And Train Operation Organization

With the continuous improvement of urban rail transit network,Choosing reasonable routing modes and train operation organization schemes for different time and space passenger flow characteristics of different lines is conducive to promoting the matching of transport capacity and volume.Research on train routing and train operation organization is of great theoretical significance and practical value for improving the efficiency of rail transit bottoms,reducing the operating costs of enterprises and meeting passenger travel needs.This paper makes a comparative study of seven common intersection modes,including single routes,large-and-small routes,circular routes,and so on,analyzes their advantages and disadvantages and their application.This paper systematically analyzes the spatial and temporal distribution characteristics of passenger flow,line transport capacity,traffic organization and other factors affecting the choice of routes.The objective function is to maximize the sum of the full load rate of each section and minimize the number of vehicles used.The optimization model of train running interval is established under the constraints of train tracking interval,longest waiting time of passengers,and the ratio of large to small routes.Taking Nanjing Metro Line 3 as an example,through the analysis of passenger flow of Line 3,this paper chooses the mode of large-and-small routes from Linchang to Mozhoudong Road,Taifeng Road to Shengtaixi Road,and the mode of full-and-large routes in flat and low peak periods.According to the optimization model of traffic plan under large-and-small routes mode,the optimum running interval and the ratio of large and small transit trains in each period are calculated,and compared with the scheme before optimization,the running interval between rush hours is reduced by 6.67%,and the peak period is expanded by 20%.On the basis of passenger flow forecast,the routing mode and train operation scheme of Line 3 in 2023 are optimized.The operation organization of the train runs according to the plan under normal conditions.When the fault occurs,it needs to be dealt with by human intervention.By studying the traffic mode and train operation scheme under three abnormal conditions: line interruption,turnout failure and overhead catenary power loss,the safety key points of the train operation organization are summarized.