The effect of reinforcement with geosynthetic materials on the redistribution of vertical stresses and increased stability of the foundation in the rail joint area

Abstract

This study focuses on identifying and evaluating vertical dynamic stresses that arise in the rail joint zones of railway tracks under the influence of trains traveling at speeds of 160–200 km/h. The calculations account for impact loads resulting from wheel–rail interactions, joint gaps, structural irregularities, and uneven load distribution across sleepers. Static and dynamic stress components are superimposed to determine the total stress profile. The effectiveness of local reinforcement using geosynthetic materials is assessed based on the reduction of stress with depth. Calculations are performed within a zone extending 6 to 10 sleepers on either side of the rail joint (a total of 12–20 sleepers). The results are used to enhance the deformation resistance of the subgrade, ensure compliance with regulatory stress limits, and determine the optimal length of the reinforced zone.