Methodologies to Assess SASW Shear Wave Velocity Uncertainty

Hiltunen, Dennis R.; Marosi, Karen T.; Gardner, Jason

doi:10.1061/40803(187)94

Cited by 2 publications

(2 citation statements)

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“…In such a choice, it has been shown that the uncertainty in shear wave velocity increases with the number of layers (Hiltunen et al , 2006). That is not the case with the parameterization here.…”

Section: Dispersion and Masw Analysismentioning

confidence: 65%

“…There has been interest in evaluating these non-invasive techniques (Tran & Hiltunen, 2008). Additionally, the uncertainty in the analysis and the impact on application risks has begun to be considered (Hiltunen et al , 2006;Marosi & Hiltunen, 2004). Typical practice involves the acquisition of Rayleigh wave data using a surface seismic source and geophone receiver deployment.…”

Section: Introductionmentioning

confidence: 99%

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Establishing Confidence in Surface Wave Determined Soil Profiles

Michaels

2011

GeoRisk 2011

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This is an author-produced, peer-reviewed version of this article. The final, definitive version of this document can be found online at GeoRisk 2011: Geotechnical Risk Assessment and Management (GSP 224) ABSTRACTSurface waves can be used to determine the shear velocity profile from the ground surface to some depth limited by the spectral band of the seismic source. A number of factors influence the uncertainties of the determined profile. The field acquisition factors include the deployment geometry of geophones, the spectral characteristics of the geophones, recording instruments, and seismic source. A key data processing factor is the determination of a dispersion curve from the field recordings. Finally, there are important choices in conducting the inversion of the dispersion curve which leads to the final soil profile. Even if the field factors and acquired data are fixed, determination of the dispersion and the inversion decisions will have a strong influence on the final result. Different engineers will make different decisions, and a range of soil profiles can be expected. Assessment of this variability was the goal of the Surface Wave Benchmark Study sponsored by the Geophysical Engineering Committee of ASCE. Participants were invited to analyze as little or as much of the data as they wished. This paper documents one participant's analysis of a selected set of the data taken at a single location. A key finding documents how a lack of low frequency content limits the maximum depth for which one can have confidence in the soil profile.

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Section: Dispersion and Masw Analysismentioning

confidence: 65%