Study On The Key Point Of Train Operation For New Rail Lines On Urban Rail Transit Network

ABSTRACT:In recent years, the urban rail transit has been developed rapidly in China. For example, as the construction and operation of new rail lines, the network of urban rail transit is starting to take shape, as well as the network features are becoming obvious in megacities. However, when urban rail transit network is expanding tremendously, the challenge to connect new rail lines to the existing network is attracting more and more attention from local planning and operation units. Since there are varieties of types, functions and access modes of the new rail lines, the traditional method of train operation is not able to meet the requirements for new rail lines nowadays and in the future. As a result, study on new method of train operation adapting to the development of the urban rail transit network is necessary to be carried out.Based on the current situation of quantities of new rail lines in the network and the advanced experience at home and abroad, this thesis presents a series of study relating to the new method of train operation for new rail lines, taking the demands of passengers and enhancing the rail traffic service level as goal.(1) This thesis describes the factors that might affect the construction scale and timing of new rail lines. Considering the line types, functions and the layout of new lines, four ways to connect new lines to the existing network are also defined.(2) This thesis illustrates that new rail lines operation change the network passenger flow because of the network expanding and the passenger routing diversity. For different access modes, the distribution of network passenger flow is diverse. Through statistical analysis of historical data, come to a conclusion of operating new rail lines affect the whole passenger flow of the network.(3) This thesis discusses the new method of train operation for urban rail transit network, regarding to the train marshalling and the departing time setting of the first and last train for the new lines, as well as the train routing setting for extension lines, skip-stop train scheduling for suburban lines and joint operation arrangement. Especially, principles of departing time setting of the first and last train for the new lines are brought up, in terms of which, models of scheduling the first and last train in suburban lines and off-grid lines are built up. Meanwhile, suggestions are also addressed:unfixed train marshalling plan could be applied in the initial stage of a new line operation; the long-term and short-term train routing for extension lines; according to passenger flow characteristics and capacity utilization, optimization model for skip-stop train plans, with the aims of the minimal total travel time of passengers was proposed.(4) Measures and advices on connecting new rail lines into the existing network are given out, aiming at solving the contradiction between the rapid growth of amount of passengers in the existing network and the matching of carrier capabilities, ensuring the safe smooth orderly connection of new rail lines.