ABSTRACT
Viscosity is used for calculation of settlements and deformations of frozen loamy soils and ice caused by viscous flow at constant speed under action of long-term loads. A method for determining the viscosity coefficient of frozen loamy soil by CPT was developed. Experimental studies by CPT were carried out in a quasi-static mode (a series of short tests at low well-controlled speeds) and in a step-increasing relaxation-creeping mode (a series of penetrometer stabilizations in which the penetrometer and the speed of its penetration gradually decreased). Comparative data «unit cone resistance qc – velocity of penetration vc » were analyzed using mathematical statistics methods. For frozen loamy soil, a generalized regression equation qc = M(vc)m was established. Parameters M and m are calculated based on empiric equations, depending on the soil temperature. Viscosity values obtained by uniaxial compression CPT were compared. As a result of statistical analysis, an empirical transition coefficient between them was established.
