… The critical state concepts for unsaturated soil developed in this thesis were first proposed
by Dr. SJ Wheeler. The experimental work was performed in the Department of Civil and …

… on the soil's wetting state. [3] Suction stress provides a framework for the examination of the
state of stress in unsaturated soil … known two independent stress state variable approach [eg, …

… A state-dependent elasto-plastic constitutive model for both saturated and unsaturated soils
… under an extended critical-state framework, uses two independent stress state variables: net …

… of saturated soil mechanics and the same should be true for unsaturated soil mechanics. …
and character of stress state variables for saturated and unsaturated soils. The descriptions are …

… or calculated as when soil is saturated. This limitation has … soil suction measurement and
theories in unsaturated soil hydrology. For example, a tensiometer can be used to measure soil …

… aspects for preparation of constitutive equations of unsaturated soils are discussed. First, …
behavior of unsaturated soils. Suction effects are clarified for each state and these are used …

… unsaturated soil property functions and the solution of nonlinear partial … equations.
Breakthroughs in the in situ and laboratory measurement of soil suction are allowing unsaturated soil …

… on the state dependency of unsaturated soil behaviour. Moreover, some aspects of soil …
In the current review paper, the state dependency of unsaturated soil behaviour is reviewed, …

… The development of constitutive equations for saturated soils in the early 1980s has
required three main ingredients: the concept of e!ective stress, the existence of elastic-plastic …

… state in unsaturated soils Alternative equilibrium analysis Graphical representation of stress
state in unsaturated soils Stress state … and discontinuities in soil behaviour Conclusions …