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<p>An attempt has been made to review the effect of different loading conditions for the rail resting on the geocell-reinforced foundation using finite element&#xa0;analysis. A simplified two-dimensional longitudinal section of the railway track system is modelled, with the rail represented by a plate element and geocell infill soil as an equivalent composite layer to capture its enhanced strength and stiffness, similar to a geocell-reinforced layer. The developed model is validated against experimental data, field investigations, and a discrete lumped parameter model. Two types of design wheel load conditions are explored, i.e., concentrated wheel load and wheel load distributed over adjacent sleepers with dynamic effects incorporated using the load factor defined by three different studies. It is observed that when a concentrated wheel load with dynamic load factor as described by AREMA is considered, a conservative design of railway tracks may be achieved in comparison to other discussed loading conditions. The influence of variation in aspect ratio and stiffness of geocell, stiffness of foundation soil and number of geocell layers in the foundation&#xa0;is analysed&#xa0;with the help of a detailed parametric study.</p>

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Effect of Design Loading Conditions on Rail Resting on Geocell-Reinforced Earth Bed

  • 期刊论文

  • 发表日期：

    2025年9月15日

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  • Shailja Joshi,
  • Shashank Bhatra

摘要

An attempt has been made to review the effect of different loading conditions for the rail resting on the geocell-reinforced foundation using finite element analysis. A simplified two-dimensional longitudinal section of the railway track system is modelled, with the rail represented by a plate element and geocell infill soil as an equivalent composite layer to capture its enhanced strength and stiffness, similar to a geocell-reinforced layer. The developed model is validated against experimental data, field investigations, and a discrete lumped parameter model. Two types of design wheel load conditions are explored, i.e., concentrated wheel load and wheel load distributed over adjacent sleepers with dynamic effects incorporated using the load factor defined by three different studies. It is observed that when a concentrated wheel load with dynamic load factor as described by AREMA is considered, a conservative design of railway tracks may be achieved in comparison to other discussed loading conditions. The influence of variation in aspect ratio and stiffness of geocell, stiffness of foundation soil and number of geocell layers in the foundation is analysed with the help of a detailed parametric study.