“…However, even at temperatures below the freezing point of water, some water in the pores remains unfrozen (Tsytovich, 1975;Konrad, 1990;Andersland and Ladanyi, 1994) influencing the mechanical strength indirectly by reducing the ice content. To date, the role of temperature on the mechanical strength of frozen soils is very well known and an increase in strength upon a change in negative temperature has been reported (Tsytovich, 1975;Bragg and Andersland, 1981;Jessberger, 1981;Akagawa et al, 1982;Zhu and Carbee, 1984;Zhu et al, 1988;Li et al, 2004 and others). Although the above studies have provided a good understanding of the effect of temperature on the strength, detailed studies of the effect of moisture content on the mechanical strength of frozen soils are still required.…”