ABSTRACT
This paper deals with the analysis of the numerical results for underground openings in viscoplastic rock salt. Despite their complexity, the elasto-viscoplastic criteria are often integrated using analytical means for simple geometry e.g. a circular tunnel and under constant loading. But for general conditions there is a great interest in the formulation of these models for use with numerical methods such as the finite element method. The results in this paper are obtained with a finite element code called CESAR made in LCPC-Paris [1992]. The viscoplastic module is codded and implemented in finite element code CESAR by the author and presented in the paper as well. Since it was performed, the numerical code was tested through experimental data and analytical solution available for different boundary problems by the author in previous papers.
