Geocell-Reinforced Capping Layer in Rail Tracks Subjected to Cyclic Loading: Laboratory and Numerical Modeling Study
Publication: Geo-Congress 2024
ABSTRACT
This research investigates the behavior of geocell-reinforced capping layers in ballasted tracks subjected to cyclic loading. Large-scale laboratory testing and numerical modeling techniques were employed. The cyclic tests applied a 25-t axle load under frequencies ranging from 10 to 30 Hz. The geocell-reinforced capping layers were modeled using the discrete element method. The geocell structure was simulated by bonding small balls to build a realistic geometry and shape. Model parameters were calibrated based on tensile and bending tests performed on the geocell material. The DEM simulations accurately represented the irregular shape of the capping aggregates using bonded circular particles. The findings indicated that the geocell effectively reduced both vertical and lateral displacements of the capping layer. The DEM analysis provided valuable insights into the contact force chain distributions within the capping assembly.
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Geo-Congress 2024
Pages: 397 - 406
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Published online: Feb 22, 2024
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