DYNAMIC STRENGTH PARAMETRS OF CLAY SOILS AND METHODS FOR THEIR DETERMINATION

E. A. Sentsova; Сенцова Е. А.; M. S. Nikitin; Никитин М. С.; E. A. Voznesensky; Вознесенский Е. А.

doi:10.31857/S0869780923040082

DYNAMIC STRENGTH PARAMETRS OF CLAY SOILS AND METHODS FOR THEIR DETERMINATION

Authors: Sentsova E.A.¹, Nikitin M.S.¹, Voznesensky E.A.¹^,2
Affiliations:
1. Geological Faculty, Lomonosov Moscow State University
2. Sergeev Institute of Environmental Geoscience RAS
Issue: No 4 (2023)
Pages: 63-73
Section: SOIL AND ROCK ENGINEERING AND MECHANICS
URL: https://journals.rcsi.science/0869-7809/article/view/139142
DOI: https://doi.org/10.31857/S0869780923040082
EDN: https://elibrary.ru/YIGRGW
ID: 139142

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Abstract

Correct determination of strength properties is always relevant for the prediction of soil mechanical behavior. This issue in a static formulation of the problem is widely discussed in technical literature. However, the determination of strength properties under dynamic loading remains debatable. This paper discusses a new methodological approach developed to determine the parameters of dynamic shear strength of saturated samples of model clay soils based on a combined analysis of static and dynamic triaxial testing data. It is demonstrated that, other conditions being equal, the value of the angle of internal friction of clay soil samples with predominantly a coagulative structure is the same under static and dynamic conditions; however, cohesion decreases under dynamic loading and this effect is attributed to the thixotropic strength loss in such a soil.

Keywords

laboratory tests, dynamic triaxial test, soil strength, thixotropy

References

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