Ice rubble frictional resistance by critical state theories

摘要

To describe the ice rubble shear strength, the Mohr-Coulomb criterion is often recommended. However, its inconsistency with some shear strength measurements was reported in the literature. The paper argues that a main source of this inconsistency is the ice rubble tendency towards volumetric changes which are ignored in the Mohr-Coulomb criterion. This argument is supported by the available data on bi-axial compression of ice rubble. The influence of volumetric changes on the ice rubble shear st