Constitutive theories on viscoelastoplasticity and damage of frozen soil

The constitutive theory on the viscoelastoplasticity and damage of frozen s oil is based on the continuous mechanics and thermodynamics. The basic prin ciples of the theory, dissipation potential function and damage model are p resented. The constitutive theory explains the mechanical properties of fro zen soils under complicated stresses, especially under high confining press ures which make frozen soil harden and soften. The agreement between the ca lculated results by the constitutive theory and the experimental results of triaxial creep of frozen soil is seen to be very good.