Throughput capacity of a single-track stage when designing a double-track insert

Abstract

At the present stage of development of the railway transport infrastructure, the construction of double-track inserts can be considered as the first stage of strengthening the throughput and carrying capacity before the construction of the second continuous main tracks. In this study, the regulatory documentation that establishes the procedure for calculating and analyzing the capacity of double-track crossings is analyzed, dependent, conditionally independent and unaccounted factors affecting the capacity are classified. As part of the implementation of the project for the development of the Eastern Polygon, a static analysis of the linear parameters of the spans on which double-track inserts are designed is presented. In case of a conditional railway stage with characteristics close to the existing ones, the influence of the average speed of trains on the stage on the available capacity was studied. Graphs of the dependence of these parameters are plotted, and the most probable loss of throughput is determined for different lengths of runs and a given length of a two-track insert. It is established that with decrease in the average speed of trains on the single-track part of the stage, for example, due to the current long-term speed restrictions, there is a sudden decrease in the available capacity, which ultimately leads to the need to design a double-track insert of a longer length and the increase in investment to the development of the stage throughput capacity.