A dynamic model of ballasted rail track with bituminous sub-ballast layer
- Authors: Di Mino, G; Di Liberto, CM; Maggiore, C; Noto, S
- Publication year: 2012
- Type: Articolo in rivista (Articolo in rivista)
- OA Link: http://hdl.handle.net/10447/78994
Abstract
The bituminous sub-ballast layer within the ballasted rail track allows some mechanical and environmental advantages. An analytical model of a ballasted rail track with sub-ballast layer has been proposed by considering the rail as viscous-elastic continuous beam discretely supported, at four levels of elasticity. The model was used to compare the mechanical performance of both ballasted track with and without bituminous sub-ballast layer. The results confirmed that the bituminous sub-ballast layer reduces the dynamic forces on the ground and achieves the technical objectives as reduction of ground borne vibrations and increase of the design life of the rail track.