Experimental Study of the Influence of a Defective Ground Surface, on Increasing the Acceleration and Movement of Sleepers during the Action of Railway Rolling Stock

Abstract

A review of the research on the study of the outflow of heterogeneous roadbed of railway tracks on the development of irregularities on the track and its impact on the increase in dynamic impact on the track is carried out. The device and methodology for determining accelerations and displacements of railway sleepers depending on the dynamic load of railway rolling stock and taking into account the technical condition of the roadbed and crushed stone ballast of the railway track are proposed. The experimental measurements of acceleration on a railway track sleeper were also carried out, depending on the type of rolling stock and the technical condition of the roadbed. The sleepers were deposited on a section of track with a defective roadbed and on a section of railway track with a technically serviceable roadbed, taking into account the action of the type of rolling stock. It is established that the number of accelerations and displacements that occur on the sleeper when passing freight and passenger trains through a defective roadbed is higher than the passage of rolling stock through a technically serviceable roadbed. That in order to ensure a stable geometry of the railway track, it is necessary to keep the crushed stone ballast layer of the track and the roadbed in a technically serviceable condition, to prevent the development of subsidence, especially on sections of the track that are experiencing waterlogging; that the indicator of changes in the technical condition of the railway track with a defective roadbed is the amount of accelerations and subsidence of the track that occur during the passage of rolling stock of railways.