Trainload freight cost-effective substructure design: Half sleeper scale tests (C-RR-CES-020)

Subgrade erosion has been identified as one of the common track substructure problems encountered on British Rail track (refs. 4 & 10). The problem occurs, mostly, when ballast lies directly on top of a fine grained subgrade (clay or silt). The effects of localised dynamic loading and exposure to water...