Study of the Effect of Asphalt Concrete Suballast Layer on the Accumulation of Residual Deformations in the Railway Track Structure

A series of publications is devoted to the study of the effectiveness of asphalt concrete material in the design of the railway track. This article discusses the effect of the sub-ballast layer of asphalt concrete on the accumulation of residual deformations of the roadbed of the railway track. The purpose of the work was to determine the deformations of the roadbed on the experimental section of the Moscow Railway, which includes an experimental section with a length of 500 m, with a laid asphalt concrete layer, and a control section with a length of 500 m, without the construction of an asphalt concrete layer. An analysis of the primary data obtained from the results of leveling soil grades at the experimental site was carried out, the absolute values of the residual deformations of the subgrade at the site of the sub-ballast asphalt concrete layer and at the control site were determined; the rate of accumulation and the unevenness of residual deformations of the subgrade in each of the sections for the period under review were assessed.