Author(s): K. N. Shkhinek; A. G. Jilenkov; V. N. Smirnov; G. A. N. Thomas
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Keywords: No Keywords
Abstract: Several problems can be addressed with the aid of a Borehole Jack (BJ). In particular, this method can be used for detailed investigation of ice strength and properties. In particular, the pressure curves obtained with a BJ can be used to validate different mathematical ice models for3D compression conditions. More precise information about available ice models and their parameters is important for theoretical consideration of the ice/structure interaction process. This information makes it possible to justify the theoretical consideration of ice action on structures. A numerical solution for assessment of BJ measurement records has been provided by the study presented in this paper. The method is based on the Finite Difference methodology and a combination of lagrangian/eulerian coordinates. This enables the deep penetration of an indenter in ice to be considered. Different mathematical ice models (Treska, Mohr-Coulomb, MohrCoulomb–Treska, Nadreu-Michel, (Fish-Zaretsky) ) are considered. The dependence of the pressure on the indentation path was obtained for each model in numerical experiments. The AARI field measurements were classified and used for comparison with the numerical experiment results. This comparison provides a basis for the choice of a reasonable mathematical ice model. A special program has been developed for determining the influence of weak zones in ice on the BJ recordings.
Year: 2010