Single- and multi- component inversion of Rayleigh waves acquired by a single 3-component geophone: an illustrative case study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F17%3A00482504" target="_blank" >RIV/67985891:_____/17:00482504 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.13168/AGG.2017.0024" target="_blank" >http://dx.doi.org/10.13168/AGG.2017.0024</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.13168/AGG.2017.0024" target="_blank" >10.13168/AGG.2017.0024</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Single- and multi- component inversion of Rayleigh waves acquired by a single 3-component geophone: an illustrative case study

Popis výsledku v původním jazyce

Rayleigh wave dispersion can occur according to complex mode excitation such that the interpretation of the phase or group velocity spectra can be erroneous thus leading to wrong reconstruction of the subsurface shear-wave velocity profile. In this paper, we present a case study solved by considering the holistic analysis of the Rayleigh waves recorded by a single three-component (3C) geophone and inverted by considering the group-velocity spectra of the radial and vertical components together with the Radial-to-Vertical Spectral Ratio (RVSR) and the RPM (Rayleigh-wave Particle Motion) frequency curve. In order to test the performance of the considered methodologies, we intentionally considered a complex site characterized by a high level of background noise and with a limited space to perform the investigation. In addition, passive data collected by the same 3C geophone are used to compute the Horizontal-to-Vertical Spectral Ratio (HVSR). Due to the vibrations produced by a nearby excavator, in order to obtain a meaningful HVSR we selected only a small portion of the recorded data. Computed HVSR is then jointly inverted with the active data to further validate the retrieved subsurface model and obtain information about the shear-wave velocities of the deeper layers. Altogether, four different inversion strategies are pursued and the obtained VS profiles compared also with the data available from local penetrometer test and borehole information.

Název v anglickém jazyce

Single- and multi- component inversion of Rayleigh waves acquired by a single 3-component geophone: an illustrative case study

Popis výsledku anglicky

Rayleigh wave dispersion can occur according to complex mode excitation such that the interpretation of the phase or group velocity spectra can be erroneous thus leading to wrong reconstruction of the subsurface shear-wave velocity profile. In this paper, we present a case study solved by considering the holistic analysis of the Rayleigh waves recorded by a single three-component (3C) geophone and inverted by considering the group-velocity spectra of the radial and vertical components together with the Radial-to-Vertical Spectral Ratio (RVSR) and the RPM (Rayleigh-wave Particle Motion) frequency curve. In order to test the performance of the considered methodologies, we intentionally considered a complex site characterized by a high level of background noise and with a limited space to perform the investigation. In addition, passive data collected by the same 3C geophone are used to compute the Horizontal-to-Vertical Spectral Ratio (HVSR). Due to the vibrations produced by a nearby excavator, in order to obtain a meaningful HVSR we selected only a small portion of the recorded data. Computed HVSR is then jointly inverted with the active data to further validate the retrieved subsurface model and obtain information about the shear-wave velocities of the deeper layers. Altogether, four different inversion strategies are pursued and the obtained VS profiles compared also with the data available from local penetrometer test and borehole information.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10507 - Volcanology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Acta geodynamica et geomaterialia

ISSN

1214-9705

e-ISSN

—

Svazek periodika

14

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

14

Strana od-do

431-444

Kód UT WoS článku

000416969900006

EID výsledku v databázi Scopus

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