An Improved Method of Calculation Passing Capacity of High-Speed Railway

In order to make full use of the passing capacity and ensure the service quality of high-speed railway operation, it is especially important to calculate the passing capacity of high-speed railway reasonably. The direct calculation method is simple, but it aims at the ordinary railway and is not directly applicable to the high-speed railway. In this paper, the parameters of the original direct calculation method were studied and corrected based on the characteristics of high-speed railway operation of China. Firstly, in order to describe the horizontal structure of the train operation diagram, the train types were divided according to the grade of train speed. Secondly, the influence of the train stopping scheme and the overtaking scheme on the longitudinal structure of the train operation diagram were quantitatively analyzed, and obtained the calculation method and relevant parameters of the average time of the train group occupied in the train operation diagram. Thirdly, the effective time for calculating the passing capacity of high-speed railway was determined based on the skylight time and the reasonable time range of arrival and departure of high-speed trains. Finally, the formula for direct calculation of the passing capacity of high-speed railways was obtained. The case study shows that the improved direct calculation method can well adapt to the calculation of the passing capacity of high-speed railway in China; based on the dynamic change of train operating diagram structure under different train operating schemes, the parameters of the improved direct calculation method are adjusted synchronously, so it can reflect the line passing capacity under different train operating schemes accurately.