Modern models of soils to describe elastic-viscoplastic properties do not always lead to the desired results , especially when it is necessary to take into account the time factor. In particular, one cannot always describe the rheological model and creep and relaxation , as well as get extreme at kinematic mode loading. This is due to the fact that the deformation in the soil medium is accompanied by complex physical and physico-chemical phenomena , changes in the orientation of each mineral particles in space and time , their mutual offset seal ( hardening ) and decompression ( softening ) . Quantitative assessment of buildings and facilities associated with the calculation of the stress - strain state ( SSS ) foundation soils subject to numerous factors , including the physical feature of the power and influence ( statics, kinematics, dynamics ) and mechanical properties of soils under such effects ( creep , ductility ) .In the present paper the results of scientific studies of the rheological properties of sandy soils. The purpose of these studies - determination of viscosity sandy soils kinematic and dynamic triaxial test mode. A technique for determining the viscosity of soils results in triaxial kinematic mode (with speed control vertical movements). The paper considers the problem of estimating the impact of the dynamic loads on the viscosity of sandy soils.

A characteristic feature of high-rise buildings is the fact that they are erected, as a rule, in deep pits, have a large support area, and transmit significant loads onto the bed soils. Moreover, enormous soil masses both beneath the foundations, and also beyond the pit enclosure are implicated in interaction between the underground and above-ground portions of high-rise buildings.A complex stress-strain state (SSS), which is transformed in space and time during construction of a high-rise building, is formed during interaction of the "bed − foundation − sub-and superstructures − surrounding setting system" (hereinafter "system"). This is dictated by numerous factors, and above all, by a characteristic feature of the physico-mechanical properties of the soil mass enclosing the underground portion of the building and surrounding setting. The following are classed as such factors: physical and geometric nonlinearity, degree of anistropy, plasticity, and creep.Consideration of the soil properties and characteristics of the procedure used to erect the building (step-by-step) for a quantitative assessment of the SSS of the "system" is possible only by the numerical method recommended in standard documents [1].A reliable assessment of the SSS of the "system" is needed to determine the settlements and tilt of the foundation (slab, slab-pile), the deflection of the enclosing structures, and the additional settlements of foundations within the surrounding setting.

This article provides a solution to the problem of the stress-strain state of a soil mass adjacent to a vertical excavation when applying a uniformly distributed load on its surface. The solution of the problem was obtained by the method of trigonometric Ribere-Fileon series. The final expressions for the SSS components are provided. Contours of stresses and displacements are also shown.

No abstract

Expressions in the form of series are derived for determination of the stress distribution, deformations, and displacements in a soil region subject to local loading under plane deformation and various conditions on the lateral boundaries. A comparison of the stress and strain state was made between the region under consideration and the mass of soil in the form of a half-space. Expressions in the form of series are derived for determination of pore-pressure distribution in the soil region under consideration, and also the settlement of any point of the surface over time with allowance for the compressibility of the pore water and the creep of the soil skeleton. Secondary consolidation in the soil mass under conditions of the plane problem is discussed.