Concept
Seismic refraction
Related publications (9)
Jetting from cavitation bubbles due to multiple shockwaves
We present experimental observations of microjets formed by cavitation microbubbles. An underwater electric discharge, applied beneath a flat free surface, produces a primary compression wave, which undergoes several phase inversions upon reflections from ...
AMER INST PHYSICS2018Analysis of TBM tunnelling performance in faulted and highly fractured rocks
The thesis focuses on the study of the performance of TBMs in highly jointed and faulted rocks. Despite the great production rates recorded in favourable ground conditions, the TBM advance can be significantly slowed down in limiting geological situations ...
EPFL2015Shear velocity estimates in rough-bed open-channel flow
Ulrich Lemmin, Fereshteh Bagherimiyab Hunkeler
Shear velocity u(*) is an important parameter in geophysical flows, in particular with respect to sediment transport dynamics. In this study, we investigate the feasibility of applying five standard methods [the logarithmic mean velocity profile, the Reyno ...
Wiley-Blackwell2013Seismic risk for existing buildings in Switzerland-development of fragility curves for masonry buildings
Pierino Lestuzzi, Amin Karbassi
Seismic verification of existing buildings in Switzerland is currently assessed by the pre-standard 2018. In the seismic evaluation of existing buildings in that document, a minimal acceptable seismic safety must be verified, as well as proportional level ...
2012Geological characterization of cataclastic rock samples using medical X-ray computerized tomography
Technical difficulties associated with tunnelling operations in tectonized geological settings are frequently encountered. They may include instantaneous and delayed cavity convergence, sudden collapse of walls or roof of a gallery, outpouring of fault-fil ...
EPFL2009A Monte-Carlo approach for tracking mobile personnel
In this paper, we propose a Monte-Carlo method based on the particle filter framework to track footfall locations generated by mobile personnel using seismic arrays. While the particle proposal function follows a simple bootstrap approach, the novelty in o ...
2007