Dynamic Response of Railway Track Rested on Transversely Isotropic Poroelastic Media

Based on Biot's wave equation, the dynamic response of a transversely isotropic saturated soil under train load was studied with Fourier transform technique. In this application, the track, including the rails, rail pad, sleepers and ballast, is modeled as an infinite layered beam structure. Analytical solutions for displacement, stress and pore pressure are derived in the form of integral. Numerical results are obtained by using the inverse Fourier transform and are used to analyze the influence of the anisotropic parameter of the ground on the ground vibration and pore pressure. It is shown that the anisotropy of stratum has great influence on the behavior of soil-track system.