RHEOLOGICAL REGULARITIES IN FROZEN SOIL MECHANICS AND THEIR APPLICATION IN ENGINEERING CALCULATIONS ---INTERNATIONAL CONFERENCE ON RHEOLOGY AND SOIL MECHANICS, 12-16 SEPTEMBER 1988, COVENTRY, UK

The rheological constitutive equations of frozen soil derived using hardening creep theory are reported. In contrast to traditional equations the proposed equations describe simultaneously the creep deformation development and the long-term strength decreasing. These equations relate to the known regularities of frozen soil deformation including the availability of all three creep stages with progressive flow stage resulting in failure, the effects of positive and negative dilatation, etc. In under ultimate region the proposed equations are simplified and result in the usual power form. Computer realization of proposed equations is done on the basis of finite element method. It is shown that the utilization of simplified modification of these equations makes the problem easier through decreasing of its dimensions.(a) for the covering abstract of this conference see IRRD 818664.