Studies On Thermo-hydro-mechanical Coupling Model And The Dynamic Response Of Soft Clay

To study the heat (field of temperature), the fluid flow (field of seepage) and the mechanics (field of stress and displacement) in saturated and unsaturated porous medium, thermo-hydro-mechanical coupling effects should be considered. To understand and master the influence of thermo-hydro-mechanical coupling effects on the physical and mechanical behaviors of soft clay, constitutive model of saturated and unsaturated porous medium and the dynamic response of porous medium under mechanical loading are studied on the basis of thermo-hydro-mechanical coupling model. The main work includes:(1) Considering the thermo-hydro-mechanical coupling effect, the constitutive model is studied, and one-dimension analytical solution is obtained for thermo-hydro-mechanical coupling problem;(2) The constitutive model of thermo-hydro-mechanical coupling is presented for unsaturated soil considering the thermo-hydro-mechanical coupling effect;(3) Based on the thermo-hydro-mechanical model, the Biot wave equations is modified, and the dynamic response theory of the soft clay considering the thermo-hydro-mechanical effect is studied;(4) The dynamic response of the thermo-hydro-mechanical coupling foundation is analyzed considering the effect of the loading velocity,;(5) The thermoelastic dynamic response of soft clay under the action of a buried source is analyzed using the presented model of saturated soil.In conclusion, thermo-hydro-mechanical coupling constitutive model and dynamic response of saturated and unsaturated porous medium are systematically studied in this paper, Some developments have been gained both in methods and applications. The research in this paper lays a foundation for further investigation of practical soft clay.