Full Seismic Waveform Tomography at a Highly Variable Florida Site
The paper presents the application of 2-D time-domain waveform tomography to a highly variable site in Florida. The measured seismic surface wave fields were inverted using a full waveform inversion technique, based on a finite-difference solution with Gauss-Newton updating. Both the compression wave (P-wave) and shear wave (S-wave) velocities are inverted independently and simultaneously for possible indications of soil types. The waveform analysis was able to delineate: (1) a shallow low-velocity layer, (2) a variable high-velocity layer, (3) a low-velocity zone embedded at 9 to 14 m depth, and (4) highly variable bedrock, laterally and vertically, at the bottom of profile. The computed shear wave velocities with depth were found to be generally consistent with cone penetration test (CPT) tip resistance. The technology is very applicable to both shallow and deep foundation design where soil stratigraphy as well as variability (horizontal and vertical) is important. Moreover, the invasive soundings (e.g. CPT, SPT) could be used for assessing properties, and the seismic waveform tomography may then be used to assess layer boundaries and horizontal spatial correlation structure.
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Supplemental Notes:
- This paper was sponsored by TRB committee AFP30 Soil and Rock Properties.
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Tran, Khiem T
- McVay, Michael
- Faraone, Michael
- Horhota, David
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Conference:
- Transportation Research Board 92nd Annual Meeting
- Location: Washington DC, United States
- Date: 2013-1-13 to 2013-1-17
- Date: 2013
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; References;
- Pagination: 14p
- Monograph Title: TRB 92nd Annual Meeting Compendium of Papers
Subject/Index Terms
- TRT Terms: Elastic waves; Geological surveying; Geotechnical engineering; Stratigraphy; Tomography; Waveform analysis
- Geographic Terms: Marion County (Florida)
- Subject Areas: Geotechnology; Highways; I40: Soils and Rocks;
Filing Info
- Accession Number: 01477037
- Record Type: Publication
- Report/Paper Numbers: 13-1520
- Files: TRIS, TRB, ATRI
- Created Date: Mar 28 2013 9:02AM