ABSTRACT
The critical state can be expressed in q-p′ space and v-ln p′ space in terms of the following two equations, respectively:
) ; ln( )q p/ v v pc c′ = +Γ λ (2)
where p′ is the mean effective stress of saturated soils, q is the deviator stress, v is the specific volume, εs is the deviator strain, M is the slope of the critical state line in q-p′ space, Γ and λ are the intercept (p′ = 1 kPa) and the slope of the critical state line, respectively, in v-ln p′ space, and the subscript c represents the critical state.
