Determination of the Viscosity Coefficient of Frozen Soil Based on the Model of an Isotropic Incompressible Viscous Medium with a Polar Symmetric Stress Distribution

The viscosity coefficient is used to calculate the settlement of frozen soils and ice caused by their ductile-viscous flow at a constant speed under the action of prolonged loads. The main (standard) method for determining the viscosity coefficient is uniaxial compression. When using other methods, it is important to ensure their maximum invariance with respect to the main method. One of the ways to solve this problem is to develop models and analytical solutions that take into account the influence of the type of test on the obtained viscosity coefficient. Most test methods are characterized by an axisymmetric stress state of the soil. Based on the solution of A. Nadai, a model of an isotropic incompressible viscous medium has been developed that describes in polar coordinates the relations between the components of normal stresses and the rates of relative linear deformations at a polar symmetric stress distribution. Analysis of the behavior of the model sample under uniaxial and triaxial compression made it possible to propose an approach for determining the viscosity coefficient according to the data of triaxial tests.

O.N. ISAEV, Candidate of Sciences (Engineering), (This email address is being protected from spambots. You need JavaScript enabled to view it.)

NIIOSP named after N.M. Gersevanov, JSC “Research Center of Constreuction” (59, Ryazansky Prospect, Moscow, 109428, Russian Federation)

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