Implications of a Generalized Effective Stress on the
Constitutive Modelling of Unsaturated Soils
Mathieu Nuth and Lyesse Laloui . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Shear Strength of Unsaturated Soils: Experiments, DEM
Simulations, and Micromechanical Analysis
Vincent Richefeu, Moulay Saïd El Youssoufi, and Farhang Radjaï . . . . . . 83
Geochemical Effects on Swelling Pressure of Highly
Compacted Bentonite: Experiments and Model Analysis
Mingliang Xie, Helge C. Moog, and Olaf Kolditz . . . . . . . . . . . . . . . . . . . . . 93
Use of State Surface Approach to Explain the Barcelona
Basic Model
Xiong Zhang and Robert L. Lytton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Part II Fundamental Methods
Saturated Elasto-Plastic Porous Media under Consideration
of Gaseous and Liquid Phase Transitions
Wolfgang Ehlers and Tobias Graf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
A Stress-Strain Framework for Modelling the Behaviour of
Unsaturated Soils under Non-Isothermal Conditions
Bertrand François and Lyesse Laloui . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Numerical Simulation of Multiphase Multicomponent
Processes Considering Structural Alterations of Porous
Media – a Phenomenological Model
Sandra Freiboth, Holger Class, and Rainer Helmig . . . . . . . . . . . . . . . . . . . . 127
Flow and Contaminant Transport Model for Unsaturated Soil
Akbar A. Javadi, Mohammed M. AL-Najjar, and Brian Evans . . . . . . . . . 135
Numerical Modelling of Flow in Variably Saturated Porous
Media with Fluctuating Shallow Water Tables
Maria Mavroulidou and Michael J. Gunn . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Residual Strength of Clays at High Suctions
Jean Vaunat, Vladimir Merchán, Enrique Romero, and Jubert Pineda . . 151
Parallel Finite Element Analysis of THM Coupled Processes
in Unsaturated Porous Media
Wenqing Wang, Panos Adamidis, Matthias Hess, Dany Kemmler, and
Olaf Kolditz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Contents IX
Development of an Object-Oriented Parallel Finite Element
Code for Unsaturated Soils
Youliang Zhang and Domenico Gallipoli. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Part III Applications
Modeling Unsaturated Flow and Atmospheric Interactions
Craig H. Benson . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Mechanical Behaviour of a Clay Layer for Landfill Cap Cover
Application: Experimental Investigation and Numerical
Modelling
Sophie Camp, Jean-Pierre Gourc, Olivier Plé, and Pascal Villard . . . . . . 203
Finite Element Modelling of Soil-Vegetation Interaction
Buddhima Indraratna, Behzad Fatahi, and Hadi Khabbaz . . . . . . . . . . . . . . 211
Contaminant Transport Modelling Using EFGM
Praveen Kumar Rachakonda, Gouda Ramanagouda Dodagoudar, and
Nageswara Rao Bhairavavajjula . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233