About the authors
| First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address. | Irina V. Koroleva, Candidate of technical sciences, Associate Professor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , ORCID 0000-0003-4475-988X |
| Title of the article | Nonlinear deformation of clays under regime triaxial loading |
| Abstract. | Problem statement. Modern cities grow not only upward but also downward, so deeper soil layers are considered as basements, and the study of their mechanical properties is only just beginning. It should be noted that significant stresses arise under the foundation base, which requires that not only linear but also nonlinear deformations to be assessed during the design process. The objective of this study is to analyze the influence of soil water content and mean normal stress on the nonlinear behavior in case of deformation of highly plastic illite clays with a faulted structure under triaxial axisymmetric (stabilometric) loading. The primary objectives of the study, which led to the achievement of this objective, were: creating identical cylindrical specimens from illite clays with a faulted structure and a high clay particle content; developing a test program and conducting triaxial axisymmetric loading; determining nonlinear deformation characteristics of specimens at different moisture contents and mean normal stress values based on the analysis of the constructed graphs and the obtained failure modes; and providing a mathematical description of the volumetric deformation process of a soil specimen with a faulted structure made of highly plastic clay. Results: Experiments under axisymmetric triaxial loading were conducted using soil samples made from highly plastic illite clays with a disturbed structure. Three water contents in the soil samples were considered for analysis: 38%, 40%, and 42%. The main results of the analysis of the conducted experiments are new data on the development of linear vertical and radial deformations, total deformation moduli, and shear moduli of highly plastic clays under triaxial loading, depending on different soil moisture contents and average stresses. The analysis of the research results was performed, and certain patterns in the behavior of clayey soils with a disturbed structure under triaxial static loading were established. Conclusions: Establishing the influence of water content in soil and the value of average normal stresses on the development of vertical and volumetric deformations and on the change in deformation parameters of a sample made of highly plastic illite clay under triaxial stabilometric loading is an important task for the construction industry. |
| Keywords. | triaxial tests, highly plastic clay, humidity, stabilometer, nonlinear deformation |
| For citations: | Koroleva I.V. Nonlinear deformation of clays under regime triaxial loading // Izvestiya KGASU. 2025. №4(74) P.52-62. |
