Figure 6
The graph shows vertical and lateral displacement (S in mm) versus depth (z in m) for three train speeds: 70 km/h, 150 km/h, and 200 km/h. The track foundation is divided into three layers: Ballast, Capping, and Subgrade. Vertical displacement curves are solid lines, and lateral displacement curves are dashed lines. At 70 km/h, vertical displacement reaches 1 mm at 0.5 m depth, while lateral displacement reaches 0.5 mm. At 150 km/h, vertical displacement increases to 2 mm, and lateral displacement to 1 mm. At 200 km/h, vertical displacement reaches 3 mm, and lateral displacement 1.5 mm. Annotations indicate a 34.4% decrease in vertical displacement and an 8.4% increase in lateral displacement at 0.5 m depth for 70 km/h compared to 200 km/h. The axle load is 25 t. All values are approximated.Influence of train speed on different displacement responses of the track foundation structure. Source(s): Farooq et al. (2024)