Experimental studies of the deformation properties of frozen soils under static and dynamic loads

Abstract

The results of experimental studies of the deformation properties of sand of different water saturation are presented. The studies were conducted for frozen and unfrozen sand in static and dynamic loading conditions. The medium in all cases exhibits nonlinear properties. Dynamic strain diagrams were obtained using the Kolsky method in the split Hopkinson rod system. Static compression tests of sand were carried out in an elastic cage with registration of lateral pressure. The dynamic strain diagrams differ markedly from the static ones for both frozen sand and unfrozen sand. The level of stress in dynamic compression is much higher than in static. The diagrams of static deformation of frozen and unfrozen dry sand practically coincide. With increasing water saturation, the stress level for frozen and unfrozen sand increases.

Dynamic constitutive model of saturated saline frozen soil under uniaxial impact loading

“…As previously reported, most research on these models is conducted under low-strain-rate loadings. Saturated saline frozen soils are often subjected to static or dynamic load (Balandin et al., 2020), and in extreme cases, may be subjected to impact load in the strain rate range of 10 2 –10 4 s −1 . The deformation characteristics of the materials are more complex (Sobczyk et al., 2021).…”