Microstructure clayey soil variation under triaxial compression test introducing deforamtion instability

Abstract

The article discusses of the microstructure clay soils transformation during their deformation under triaxial compression conditions. Proposed multifaceted methodology for the numerical description of changes in the structural features of clay soils during deformation under triaxial compression conditions. The research results allow to conclude that major transformation in the structure of the sample develop at the time of deformation instability occurs. These modifications include the redistribution of the pore space and marked orientation of the structural elements of the soil. Further deformation of soil does not change the ratio of the number of pores, but the orientation of the structural elements increases throughout the deformation process.