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- W4236067991 abstract "PreviousNext No AccessSymposium on the Application of Geophysics to Engineering and Environmental Problems 2012Joint Shear‐Wave Analysis Using MASW and Refraction Traveltime TomographyAuthors: J. Tyler SchwenkRichard D. MillerJulian IvanovSteven D. SloanJason R. McKennaJ. Tyler SchwenkKansas Geological Survey, Lawrence, KSSearch for more papers by this author, Richard D. MillerKansas Geological Survey, Lawrence, KSSearch for more papers by this author, Julian IvanovKansas Geological Survey, Lawrence, KSSearch for more papers by this author, Steven D. SloanUS Army Engineer Research & Development Center, Vicksburg, MSSearch for more papers by this author, and Jason R. McKennaUS Army Engineer Research & Development Center, Vicksburg, MSSearch for more papers by this authorhttps://doi.org/10.4133/1.4721744 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract We use the multichannel analysis of surface waves (MASW) and SH‐wave refraction traveltime tomography to constrain each method's starting layer‐model at a site located at the Yuma Proving Ground, AZ. Our treatment resulted in a more stratified, higher‐resolution MASW S‐wave velocity (Vs) model that deviated from the tomographic SH‐wave solution by approximately 15%. The top 12 m were our target at the test site, which is comprised of roughly 30 m of unconsolidated sediments overlying bedrock. A bungee‐assisted drop‐weight source was used for MASW and a hammer and block were used for the refraction survey. A preliminary MASW profile served as the starting model for refraction inversion. The resultant Vs tomogram contained slightly higher velocity ranges and imaged a highvelocity layer not apparent with initial MASW results. Using this a priori information, along with density values from well logs, more layers were added to an updated Vs model for MASW inversion. The subsequent higher‐resolution MASW profile moved toward the tomographic solution. The use of two inversion schemes allowed a more constrained Vs model of the site, while limiting resolution uncertainties for the MASW Vs section. Moreover, the possible over‐parameterization problem seen with increased layers is defended through refraction comparison. We recommend the combined approach as a means to constrain MASW inversion and increase confidence in future Vs appraisals.Permalink: https://doi.org/10.4133/1.4721744FiguresReferencesRelatedDetailsCited ByEffect of A-priori Information on the Uncertainties in MASW Test6 May 2021Tunnel detection at Yuma Proving Ground, Arizona, USA — Part 1: 2D full-waveform inversion experimentYao Wang, Richard D. Miller, Shelby L. Peterie, Steven D. Sloan, Mark L. Moran, Harley H. Cudney, James A. Smith, Dmitri Borisov, Ryan Modrak, and Jeroen Tromp8 January 2019 | GEOPHYSICS, Vol. 84, No. 1Surface-wave methods for anomaly detectionJ. Tyler Schwenk, Steven D. Sloan, Julian Ivanov, and Richard D. Miller6 June 2016 | GEOPHYSICS, Vol. 81, No. 4 Symposium on the Application of Geophysics to Engineering and Environmental Problems 2012ISSN (online):1554-8015Copyright: 2012 Pages: 627 publication data© 2012 Copyright © 2012 The Environmental and Engineering Geophysical SocietyPublisher:Environmental & Engineering Geophysical Society HistoryPublished: 11 May 2012 CITATION INFORMATION J. Tyler Schwenk, Richard D. Miller, Julian Ivanov, Steven D. Sloan, and Jason R. McKenna, (2012), Joint Shear‐Wave Analysis Using MASW and Refraction Traveltime Tomography, Symposium on the Application of Geophysics to Engineering and Environmental Problems Proceedings : 197-206. https://doi.org/10.4133/1.4721744 Plain-Language Summary PDF DownloadLoading ..." @default.
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- W4236067991 title "Joint Shear‐Wave Analysis Using MASW and Refraction Traveltime Tomography" @default.
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