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With the use of creep and constant strain rate (CSR) tests, mathematical formulations were found that describe
the thermomechanical behaviour of ice-rich frozen soils. A Glen-type relationship was chosen for the formulation
of minimum creep strain rates at temperatures between -4 °C and -1 °C. The shear strength of the material could
be described by a Mohr-Coulomb failure criterion. Furthermore, it was possible to compare the creep behaviour with
the strength of similar soils under constant strain rates. The minimum creep strain rate increases proportionally as the
temperature approaches the melting point of the ice, which can be attributed to the increasing amount of unfrozen water,
which strongly influences the mechanical response. Even though only a few tests could be used for the determination
of the angle of friction and the apparent cohesion, the trend showed that the volumetric ice content influences both
parameters, but only the latter seems to be influenced by the temperature and the applied compression strain rate.
Authors:Arenson, Lukas and Springman, Sarah M.
Index Terms:Soil; Permafrost; frozen soil; creep; SoilGroup; soil behaviour; Arenson, Lukas; Springman, Sarah M.
available online at http://pubs.nrc-cnrc.gc.ca/cgi-bin/rp/rp2_desc_e?cgj
Further Information:Date published: 2005