Titre : | Advances in near-surface seismology and ground-penetrating radar |
Auteurs : | RICHARD D. Miller ; John Holloway Bradford ; Klaus Holliger ; Rebecca B. Latimer |
Type de document : | Livre |
Editeur : | TULSA WASHINGTON Denver : SOCIETY OF EXPLORATION GEOPHYSICISTS AMERICAN GEOPHYSICAL UNION Environmental and Engineering Geophysical Society, 2010 |
Collection : | GEOPHYSICAL DEVELOPMENT SERIES, ISSN 1046-0586, num. 15 |
ISBN/ISSN/EAN : | 978-1-56080-224-2 |
Format : | 1 vol. (XVII-487 p.) / ill., cartes / 29 cm |
Note générale : | Bibliogr. en fin de chapitres. Index |
Langues: | Anglais |
Concepts : |
SISMOLOGIE
ONDE RADAR |
Index. décimale : | 551.2 MIL |
Résumé : | A study of surface-wave analysis can be divided into two main parts. In the first stage, dispersive Rayleigh waves are extracted using multichannel analysis of surface waves (MASW) and then are inverted using a genetic-algorithm (GA) method to obtain shear-wave velocity profiles of the investigated site. A new interactive-based inversion algorithm that includes both GA and surface-wave inversion schemes was used in an MASW study. A special type of seismic source (SR-II, or Kangaroo) proved to be very effective in surface-wave studies. The standard-penetration-test data (SPT) and the shear-modulus distribution map derived from MASW data are compared with borehole results aimed for geotechnical applications. In the second stage, a microtrem-or survey carried out parallel to the MASW survey estimated lateral variations in sedimentary-basin depths up to bedrock. A shear-wave velocity profile of basin sediments is estimated from the GA inversion of the microtremor horizontal-to-vertical (H/V) spectrum based on surface waves from seismic noise at each site. Average shear-wave velocities estimated from the MASW survey are given as constraints in the microtremor inversion process. A new relationship between the resonance frequency ƒ0 and the thickness of the overlaying layer H is derived. A combination of active- and passive-source surface-wave analysis methods is proposed to obtain the optimum shear-wave velocity model from near surface to bedrock. |
Exemplaires (1)
Cote | Support | Section | Disponibilité |
---|---|---|---|
551.2 MIL | Livre | G - Géosciences | Disponible |