10:40 AM - 10:55 AM
[2C07-11-01] Numerical Evaluation of Condition of Grains Rearrangement in Poorly-Graded Crushed Stone Layer
Keywords:Ballasted Track, Settlement, Tamping, Crushed stone layer, Grain arrangement, DEM, Discrete element, Track maintenance operation
DEM simulations are carried out to observe the rearrangement of ballast grains during cyclic loading process after tamping operation for several models with different values of sleeper lifting. Simulation results show that the arrangement of ballast grains under sleeper is easily restored when the lifting values are less than grain size of ballast. This tendency shows good agreement with previous study about “Ballast Memory”.