Abstract: Dynamic response of saturated half-space foundationsubject to an internal heat/mechanical excitation is investigatedtheoretically with Biot's wave theory and thermodynamic theory. Thefoundation is idealized to be uniform and poroelastic. The governingequations of the thermo-hydro-mechanical coupling are presented. Theanalytical solutions of temperature increment, stress, displacement and porepressure are derived with the forward and the inverse Hankel transform.Numerical results are obtained to analyze the effect of the internalexcitation frequency on the vertical displacement and the pore pressure. Inaddition, the cases of thermo-elastic and porous elastic models are comparedin the numerical results.