Study On Carrying Capacity Bottleneck Of Urban Rail Transit Network

In the process of rapid developing of China urban mass transit network, passenger record is constantly refresh in the double stimulation of network effect and the price of ticket. At the same time, the equipments and facilities of urban transit have shown issues incompatible with such a growth, especially the contradiction between the capacity and passenger has arisen gradually. At present, urban rail transit network has preliminarily formation in some large cities, and solving the capacity bottleneck becomes more and more urgent. However, there is not any valuable research about capacity bottleneck at home and abroad. This thesis is established based on this background, which proved to be a prospective study.Based on the development reality of urban transit network and the advanced experience at home and abroad, this paper takes a series of related research on capacity bottleneck.First of all, this paper analyzes the features of urban transit network operation, and the structure of rail transit, puts forward the relative integrated concept carrying capacity bottleneck of urban rail transit network, the lassification and characteristics of the bottleneck, which lays the way of the research on capacity bottleneck.Secondly, the theory and cumulating methods of station collection and distribution capacity in different granularity as well as the line carrying capacity in different block way are discussed respectively, which is considered as the foundation of the study on capacity bottleneck.Thirdly, the static bottleneck and dynamic bottleneck are studied. This paper puts forward the static bottleneck positioning and sorting method based on theory of constraints. The dynamic bottleneck positioning is proposed on the basis of passenger flow assignment.Their order is determined with erpert system or urgency.Then, this paper analyzes reasons which caused static bottleneck and dynamic bottleneck separately, and puts forward the corresponding countermeasures to relieve bottleneck, including transport organization and reforming of main equipment.The pricipe of selective reconstruction and the method of establishing the best time to reform are also presented.Finally, the models and methods above are applied to R urban rail transit network, and the result proves that the theory in this paper is useful to a certain extent.