Chapter 1 General Introduction 1.1 Research background 1.2 Review of previous work 1.3 Features of this book Chapter 2 Experimental Investigation on T-H-M Properties of Geotechnical Materials 2.1 Introduction 2.2 Experimental investigation on T-M properties of geotechnical materials 2.3 Experimental investigation on H-M properties of geotechnical materials 2.4 Summary Chapter 3 Thermo-Elasto-Viscoplastic Model for Geotechnical Materials 3.1 Introduction 3.2 Concept of equivalent stress 3.3 Concept of extended subloading yield surface and a new therrno-elastoplastic model for soft sedimentary rock 3.4 A new simple thermo-elasto-viscoplastic model for soft sedimentary rock 3.5 Thermodynamic properties of thermo-elasto-viscoplastic model 3.6 Performance of newly proposed models 3.7 Summary Chapter 4 Thermo-Eiastoplastic Constitutive Model for Saturated/Unsaturated Geotechnical Materials 4.1 Introduction 4.2 Derivation of thermo-elastoplastic constitutive model for saturated/unsaturated soil 4.3 Moisture characteristic curve considering the hydraulic hysteresis, the influence of void ratio and temperature 4.4 Performance of the MCC model 4.5 Performance of the constitutive model 4.6 Summary Chapter 5 Hydraulic;Mechanical Damage Model for Geotechnical Materials 5.1 Introduction 5.2 Homogenization theory of composite materials 5.3 Poromechanical framework 5.4 Formulation of a micromechanical based elastoplastic damage model 5.5 Estimation of damage induced permeability 5.6 Performance of proposed models 5.7 Summary Chapter 6 Thermo-Hydraulic-MechanicaI-Air Coupled Model for Geotechnical Materials 6.1 Introduction 6.2 Thermo-Hydraulic-Mechanical-Air coupling finite deformation algorithm of field equations 6.3 Summary Chapter 7 Numerical Applications of T-H-M Coupling Problems 7.1 Introduction 7.2 Numerical simulations of frictional deep geological disposal for high-level radioactive waste 7.3 Numerical simulation of model test on slop failure in unsaturated shirasu ground 7.4 Numerical simulation of heating experiment 7.5 Numerical simulation of underground water-sealed cavern 7.6 Summary References