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Integrated Approach to the Design of Ballasted Track Substructure using Advanced Computing Techniques

Lookup NU author(s): Dr Han-Mei Chen, Dr Cristian Ulianov, Dr Ramy Shaltout


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This paper presents an integrated approach to the design of novel track solutions, particularly from the geotechnical perspective, by employing advanced computing techniques capable of establishing design specifications and to optimise the railway track design for light, conventional and heavy freight tracks. The approach uses suitable computing tools for defining and analysing the substructure models and their interfaces, which can then be coupled with the railway superstructure model to analyse the whole vehicle-track interaction and dynamic response. Numerical modelling of the different track design models has been conducted, with comprehensive design considerations and novel reinforcement approaches. The geotechnical material nonlinearity was applied by using the Mohr-Coulomb criteria implemented in finite element analyses. The numerical results show considerable variation of key parameters such as the axle load, and the ballast and sub-ballast layer thicknesses largely affecting the track behaviour. An example case study is further summarised. A comparison has been made between different design solutions for the track substructure. Reasons for the variations in the pressure and displacement distribution patterns have been analysed and discussed, and the selection of the final suitable design for specific subgrade conditions is presented together with appropriate justification.

Publication metadata

Author(s): Chen H-M, Ulianov C, Shaltout RE

Publication type: Article

Publication status: Published

Journal: International Journal of Railway Technology

Year: 2018

Volume: 7

Issue: 3

Pages: 21-43

Online publication date: 25/02/2019

Acceptance date: 02/04/2018

ISSN (electronic): 2049-5358

Publisher: Saxe-Coburg Publications


DOI: 10.4203/ijrt.7.3.2


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