Although the strength properties of thawing soils have been largely investigated, both in theory and in experiments, there remain poorly understood issues concerning specific controls of shear strength [Bondarenko 1982, Shusherina et al. 1983]. According to the available data, the measured mechanic properties of thawing soils are subject to several internal and external controls. The former include grain size, mineralogy, structure, and physical properties, and the latter are the conditions of thawing (that influence thawing rates) and of testing (close or open test systems, presence or absence of pore pressure, loading mode). The specific contributions of each factor have not been constrained so far.
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