Effective Stress and Equilibrium Equation for Soil Mechanics

Content: 1 Introduction 1.1 Effective stresses 1.2 Equilibrium differential equations 1.3 Continuous medium matter model for soils 1.4 Three constitutive phases of soils 1.5 Soil-water potential and its components 1.6 Soil-water characteristic curves 1.7 Main contents of this book 2 Equilibrium differential equations of a soil 2.1 Equilibrium differential equations of soil mass 2.2 Static equilibrium equation of the soil skeleton 3 Effective stress 3.1 Effective stress equation and physical meaning of effective stress 3.2 Relationship between effective stress and shear strength/volumetric strain 3.3 Primary verification of the correlation between effective stress and shear strength of unsaturated soils 3.4 Effective stress principle for unsaturated soils 4 Seepage equation of unsaturated soils 4.1 Seepage equation of saturated soil 4.2 Seepage equation for unsaturated soils 4.3 Formula of seepage force 4.4 The overflow condition of the gas in soils 5 Discussion on some issues related to effective stress 5.1 Does Terzaghi\'s effective stress equation need to be modified? 5.2 Is effective stress pseudo or real stress? 5.3 Effective stress and stress state variables of soils 5.4 Effective stress and soil skeleton stress 5.5 The effective stress of unsaturated soils 5.6 Should contractile skin be the fourth phase?