Research On The Co-line Operation Plan Of Urban Rail Transit

With the continuous progress of urbanization,Urban population has been gradually increasing.Which causes urban congestion.In order to alleviate traffic congestion,Urban rail transit begins to rise.Due to the variety of passenger flow requirements,the urban rail network gradually transitions from a single line to urban rail transit network.In order to save construction costs and improve operational efficiency,operators implement the urban rail transit collinear operation mode.Due to the limited and expensive resources of the city center,in order to effectively use the urban center line resources and also to strengthen the connection between the suburbs and the urban area,many cities have been developing the intersection mode of the urban rail transit collinear operation Y-line.This paper mainly studies the development plan of the Y-line line of urban rail transit collinear operation.The main work is as follows:(1)Summarize the definition of collinear operations and introduce the scope of collinear operations;summarize the types of collinear operations and analyze the advantages and disadvantages,applicable situations of each type.(2)This paper analyzes the objective reasons for the formation of urban rail transit Y-type lines and provides an example for the theoretical basis of urban rail transit Y-type lines;It analyzes its applicable situation,of each form and examples,which provide a theoretical basis for the type of Y-line used in the later cases,finally it analyzes the influencing factors of the Y-line route planning customization,which are analyzed from three aspects: passenger flow characteristics,driving organization conditions and operating organization conditions.It provides a theoretical basis for the establishment of the objective function and constraints of the Y-line model of urban rail transit collinear operation.(3)Establish a Y-line model for urban rail transit collinear operation.Based on the theoretical basis of the previous chapter.This paper determines the reentry position of the small intersection,the train travel frequency of the large and small roads as the decision variable;the sum of the minimum passenger travel cost and the minimum enterprise operating cost(minimum train running time and number of running kilometers)is taken as the minimum objective function;establish the optimization model by taking the maximum passing ability of the train,the minimum service level of the passenger,the minimum passenger flow of the train as the constraints and use the internal function method to calculate.(4)Take M city H line and ? line as an example,analyze the line overview and the land along the line,demonstrate the reasons for the Y-line of the driving case,analyze the characteristics of the passenger flow in the passenger flow,the characteristics of the passenger flow in the section,and the characteristics of the passenger flow in the direction.,then the necessity of opening a Y-line to operate the collinear line was preliminarily determined,finaly the passenger flow data was substituted into the urban rail transit collinear operation Y-type optimization model to obtain an optimal driving plan.Take the passenger's waiting time,the running time of the train,the running kilometers of the train,and the full load ratio of the large and small roads are used as evaluation indicators.According to the change of the weight value of the passenger's waiting time,obtain the trend of each index value of the optimal driving plan.Finally,through the evaluation indicators,the optimal operation plan is compared with the initial operation plan of the case.