[en] A series of simple impact tests is performed, both on clay and on peat, in order to compare the current wave theory with the obtained
data. The waves at the surface are measured with three 3D geophones. With this the wave propagation and the energy dissipation in
three directions has been studied both for clay and peat. Since the impact produces a group of waves, only the first arrival time can
easily be detected. By transferring the wave information into a 3D energy flow, also the average arrival time and the end-of-wave
arrival time can be determined. The results of all tests are very similar, the short wave group splits up in three phases: the first phase
consists of compression waves, in the second phase the Rayleigh waves dominate and in the last phase, remarkably, a kind of diagonal
Love waves dominate. The second phase starts with a sudden flip of the particle motion due to the arrival of the second wave. In clay
78% of the energy is found in the second phase, while in peat 72% of the energy is found in the third phase.
Disciplines :
Ingénierie civile
Auteur, co-auteur :
VAN BAARS, Stefan ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
Langue du document :
Anglais
Titre :
Near field wave transformation in clay and peat
Date de publication/diffusion :
mai 2010
Nom de la manifestation :
Fifth international conference on recent advances in geotechnical earthquake and soil dynamics, San Diego
Date de la manifestation :
may 2010
Manifestation à portée :
International
Titre de l'ouvrage principal :
Fifth international conference on recent advances in geotechnical earthquake and soil dynamics, San Diego
