The methods of calculation of tense and deformed state of loessial collapsing soil grounds subsiding loess soils under the influence of long-active compactive loads at their incomplete water saturation as elastoviscoplastic environments. The determining equations are based on hereditary type current theory taking into account the bulk, shear plastic deformation, dilatancy phenomenon, different values of form making creep cores and all-round compression. The soil is isotropic environment. The increments of stresses are composed of viscoelastic and visco-plastic components. The algorithm is performed using solutions of iterative techniques and finite element method and includes solutions of linear-elastic, elastoplastic and elastoviscoplastic tasks in the definite sequence. Physical and mechanical properties, dependences of the stress and strain on the time at different values of humidity and soil compaction pressures are determined in the laboratory. Use of the reliable mathematical models of the base, taking into account the creep deformation at the design on the loess subsiding soils under conditions of incomplete water saturation contributes to reliability of the erected construction projects.

Keywords: loessial collapsing soils, creep, elastoviscoplastic environments, calculation methods, hereditary type current theory, rheological models, calculation methods, finite element method, iteration process, soil tests