The research shows that under the earthquake loading,the horizontal vibration acceleration of natural saturated sand foundation is amplified from underside to upside;the regularities of distribution of excess pore water press ra.

Dispersion of Rayleigh wave in a saturated soil ground;

Torsional vibrations of a rigid cylindrical foundation partially embedded in transversely isotropic saturated soil;

Vertical vibration of rigid foundation embedded in saturated soil

Considering the interaction between the soil and the side of the foundation,the dynamic response of a rigid cylindrical massive foundation embedded in saturated soil under vertical time-harmonic excitations is investigated based on Biot′s dynamic equations.