Analysis Of Influence Of Unbalanced Transport On The Capacity Of Large Marshalling Yard After Speeding-up

The subject selection of the dissertation focuses on the phenomenon of the lower realization rate of operations in large marshalling yard. Based on the background of the sixth railway speed-up, marshalling yard can be classifed into three types by the different flow of freight train, namely marshalling yard with overlapped flow, marshalling yard with complementary flow and marshalling yard with main stream direction flow.The dissertation analyzes the reasons for unbalanced transport from four aspects: the CDB's of intensive passenger trains, the CDB's of "Five Scheduled" trains and the through trains, train delay and clerestory maintenance, followed by their influence on the different types of marshalling yard mainly including operation at arriving-disintegration subsystem and departure subsystem.With the analysis of the influence of unbalanced transport and traditional marshalling yard formula system, the dissertation shows that the empirical formula of coefficient cannot meet the operational requirements. Therefore, two parameters are introduced into it, that is: the ratio of the equivalent number of arriving/departure trains in intensive time to the equivalent number of arriving/departure trains on average in a day and time-intensive.The dissertation gives marshalling yard based on different types has different unbalanced ratio.Applying stochastic processes theory and using the unbalanced ratio calculated from time-intensive, the dissertation accomplishes the optimization of formula system on capacity of marshalling yard based on unbalanced transport about arriving-disintegration subsystem and departure subsystem in intensive analyzing periods. Then the dissertation takes Fengtai West Station as an example to testify the application's efficiency of improved formula system, after which improvements on the low realization rate of marshalling yard is given. At the end, the dissertation conludes that passenger and freight-dedicated lines can completely eliminate influence on marshalling station brought by unbalanced transport. The dissertation includes twenty figures, twenty-three tables and seventy references.