Creep of Soils and Related Phenomena

Abstract

1. Introduction. Macro- and microapproach. Aim of rheological investigations. Creep and the accuracy of its prediction. Limitations of rheological theories. Conception of this book. 2. Examples of the rheological behaviour of geomaterials. Settlement of structures. Dam displacements. Slope displacements. Conclusion. 3. Structure and texture of soils. Introduction. Mathematical and physical modelling of constitutive relations. Structural units. Fabric. Bonding. Internal stress. Structure of some tested soils: Zbraslav sand, Landstejn sand, Loess, Kyjice clay, Sedlec kaolin, ablice claystone, Strahov claystone, Conclusion. Changes of soil structure. 4. State parameters of soils. Porosity. Water content. Stress and stress path. Strain. Time. Temperature. Conclusion. 5. Elasticity, viscosity and plasticity. Introduction. Elasticity. Viscosity. Plasticity: Introduction, Rigid-plastic approach, Modelling of constitutive behaviour, Plastic potential approach, Other physically motivated concepts, Rate-type relations. Concluding remarks. 6. Experimental rheology. Introduction. Water content and temperature fluctuations. Choice of the apparatus. Evaluation of the experimental results. 7. Macrorheology. Introduction. Method of rheological models. Method of integral representation. Empirical relations. 8. Microrheology. Introduction. Micromechanical approach. Particle-based conception: Fabric as the principal constitutive factor, Mixed analysis. 9. Primary and secondary consolidation. Introduction. Primary consolidation. Secondary consolidation. Conclusion. 10. Long-term strength of soils. Introduction. Stress - long-term strain diagrams. Long-term strength. Creep failure (rupture). Conclusion. 11. Creep and stress relaxation. Creep. Stress relaxation. Conclusion. 12. Numerical solution of rheological problems. Introduction. Numerical methods: Numerical methods in geomechanics, Finite-element method, Nonlinear techniques, Path-dependent constitutive model. Numerical modelling of creep: Review, Algorithms for computing creep by FEM. Applications: Dams, Tunnels. Conclusions. 13. Concluding comments. Appendix 1. Appendix 2. Bibliography. Author index. Subject index.