Comparison of the static and dynamic modulus of rock mass determined by seismic measurements
Autor
Krawiec, Krzysztof
Pilecki, Zenon
Kozioł, Piotr
Opublikowane w
Technical Transactions
Numeracja
Vol. 122, iss. 1
Data wydania
2025
Miejsce wydania
Warsaw
Wydawca
Sciendo
Sekcja czasopisma
Civil Engineering and Transport
Język
angielski
eISSN
2353-737X
DOI
https://doi.org/10.37705/TechTrans/e2025018
Słowa kluczowe
static deformation modulus, dynamic modulus of elasticity, seismic method, P- and S-wave velocities
Abstrakt
The study aimed to compare the quasi-static moduli determined from the empirical Barton relationship with the dynamic modulus of elasticity for various types of rock strata. Both moduli were determined from measured P- and S-wave velocities obtained by seismic refraction profiling or seismic tomography. The moduli were calculated using the Barton relationship, which requires only the P-wave velocity, while the dynamic modulus of elasticity was calculated from the P- and S-wave velocities and the bulk density of rock material. The study was conducted on various rock masses, ranging from weak, highly fractured, weathered rock to very strong rock, at different depths in Poland. The study revealed that the dynamic modulus of elasticity is significantly higher than the quasi-static deformation moduli. The relative difference between the moduli ranges from 13 to 54%. In rocks more heavily fractured by weathering and anthropogenic activity, the difference in moduli was greatest, ranging from 44 to 54%. For other rocks with less weathering and not disturbed, the relative difference ranged from 13 to 20%. More severe fractures, resulting from both weathering and anthropogenic activity, result in greater discrepancies in modulus calculations. These findings provide more effective insights into the applications of seismic-determined moduli in geotechnical problems.
