Research on Construction Sequence and Line Network Structure of Urban Rail Transit

Abstract With the construction of urban subway lines, the network characteristics of subways have begun to appear. Under certain objective conditions such as capital, manpower, and material resources, the construction sequence of subway lines ought to be different, so that priority construction of lines can maximize network benefits. In order to study the time sequence of urban subway line construction and the network effect of the line, the evaluation index of urban rail transit construction time sequence based on the complex network theory is constructed. The catastrophe progression theory is applied to avoid the subjectivity of the weighting of the primary indicators. The existing lines of Xi’an Metro are transformed into the L-space topology, and the relevant network indicators are calculated to judge the network characteristics of the subway. Through the calculation of the membership degree, the construction priority of each line is finally determined. The route planned for the third phase of the Xi’an Metro is taken as an example, the calculation results show that the small-world characteristics of the Xi’an Metro network are emerging and the network is in its infancy. The calculation results of the priority of the planned line construction sequence indicate that large-scale sports meeting and events have a decisive influence on the construction sequence of the subway line.