Laboratory Studies of Small Strain Stiffness and Modulus Degradation of Warsaw Mineral Cohesive Soils

Minerals

Emil Soból¹  Karina Zabłocka²  Raimondas Šadzevičius³  Rytis Skominas³  Wojciech Sas⁴  Katarzyna Gabryś⁴ 

[1] Department of Geotechnical Engineering, Institute of Civil Engineering, Warsaw University of Life Sciences, 02787 Warsaw, Poland;Department of Hydrotechnics and Technology, Institute of Civil Engineering, 02787 Warsaw, Poland;Institute of Hydraulic Engineering, Vytautas Magnus University Agriculture Academy, 53361 Kaunas, Lithuania;Water Centre, Warsaw University of Life Sciences, 02787 Warsaw, Poland;

关键词: stiffness;    shear modulus;    resonant column;    clay;    clay mineral;    empirical model;   

DOI  :  10.3390/min10121127

来源: DOAJ

【 摘 要 】

The shear modulus and normalized shear modulus degradation curve are the fundamental parameters describing soil behavior. Thus, this article is focused on the stiffness characteristic of 15 different Warsaw cohesive soli represented by the parameters mentioned above. In this research, standard resonant column tests were performed in a wide shear strain range, from a small one, where soil behaves like an elastic medium, to a medium one, where soil has an unrecoverable deformation. Collected data allows the authors to create empirical models describing stiffness characteristics with high reliability. The maximum shear modulus calculated by the proposed equation for Warsaw cohesive soil had a relative error of about 6.8%. The formula for normalized shear modulus estimated G/G_MAX with 2.2% relative error. Combined empirical models for G_MAX, and G/G_MAX allow the evaluation of Warsaw cohesive soil’s shear modulus value in a wide shear deformation range, with a very low value of the relative error of 6.7%.

【 授权许可】

Unknown