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The research leading to these results has received funding from the commissioned task entitled "VIA CARPATIA Universities of Technology Network named after the President of the Republic of Poland Lech Kaczyński” contract no. MEiN/2022/DPI/2575, MEiN/2022/DPI/2577, MEiN/2022/DPI/2578 action entitled "ISKRA – building inter-university research teams.
Materiał konferencyjny:
TAK
Nazwa konferencji:
7th International Conference on Geotechnical and Geophysical Site Characterization
Seismic tests in geotechnics are used to determine the maximum shear modulus, which is a parameter characterising the
subsoil in the range of very small strains. Maximum shear modulus is employed in deformation analyses, in particular
when using advanced constitutive models describing the behaviour of the subsoil. Deriving parameters indirectly is a
routine procedure in geotechnics. In the absence of seismic measurements or at an early stage of analysis, knowing the
correlation between the shear modulus and other parameters measured in situ makes it possible to approximately estimate
these parameters. The value of the shear modulus is closely related to, among others, the density of the medium and the
shear wave velocity, which is significantly influenced by the in situ vertical effective stress. Therefore, the rule is that the
shear modulus increases with depth.
The article presents the results of research on loess subsoil. Based on the seismic dilatometer tests (SDMT), a formula
was established that allows the shear modulus to be estimated from non-seismic dilatometer tests (DMT). The results
were compared to those obtained in laboratory tests such as bender element test (BET) in an advanced triaxial testing
apparatus. Formulas were derived to estimate the maximum shear modulus in the loess subsoil based on the vertical
geostatic stress and the value of the constrained modulus MDMT. Moreover, the results were analysed with reference to
the results for other soils in Poland and validated in additional field tests
