THE MODE OF CLAY SOIL DEFORMATIONS FROM THE STANDPOINT OF PHYSICOCHEMICAL THEORY OF EFFECTIVE STRESSES 

Karpenko F.S. ¹

¹Sergeev Institute of Environmental Geoscience RAS (IEG RAS) Ulansky per. 13, bld. 2, Moscow, 101000

 The character of deformations in clay soils under various stress conditions is considered from the standpoint of their physicochemical structure. It is shown that the deformation specificity of clays is determined not only by the external loads values but, above all, by the magnitude of internal interaction between clay-mineral particles composing them. The characteristic of clay deformation can be given on the basis of a comparative analysis of external stresses transmitted to their structural contacts with the value of real effective strength and deformability. This analysis allows us to explain the specific features of clay soil deformations that contradict the generally accepted theoretical provisions of soil mechanics and makes it possible to reasonably predict their deformation behavior under real stress conditions during the construction and operation of engineering and economic facilities and structures.

Key words: structural contacts, type of contact, real effective strength, real effective deformability

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