Design analysis of sleeper bearing behaviour at stabilization by geosynthetic materials

Abstract

Common feature of reconstruction and construction of new railways is in the need to have a high-quality track subgrade. Meanwhile, geosynthetic materials play an important role, for example, for improving bearing strength of the subgrade and for the increase of service life of track structure in whole. Hardness of the «subgrade - geogrid» composite system and the change of the stress-strain condition of unstabilized sleeper bearing in the comparison with the stabilized one are estimated with the use of the finite element modeling. According to results of culvert tests the paper presents comparison of plate settlement on the subgrade stabilized by the geogrid and unstabilized road-metal subgrade. Moreover, the authors assess the efficiency of subgrade strengthening by the geogrid with the use of numerical modeling.