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Characterization of simulated soilcrete column curing using acoustic tomography

  • Implementation of soilcrete columns via jet grouting or deep soil mixing to stabilize problematic subsurface soils is common in underground construction. However, industry is faced with limited options to characterize column geometry and quality of the resulting soilcrete without excavation or destructive testing. Laboratory-scale experiments were conducted on simulated soilcrete columns using crosshole ultrasonic testing to evaluate the feasibility of acoustic tomography to characterize soilcrete geometry and quality. Data were acquired on multiple columns immediately after placement up to a curing time of 120 hours. Jet grout compressional wave velocity (VP) was estimated using a first arrival time approach and inverted to construct acoustic tomograms. Acoustic tomograms indicate that crosshole ultrasonic testing is able to characterize the changes in acoustic properties that result from jet-grout curing, locate contrasts between weaker/stronger regions in the jet grout, and estimateImplementation of soilcrete columns via jet grouting or deep soil mixing to stabilize problematic subsurface soils is common in underground construction. However, industry is faced with limited options to characterize column geometry and quality of the resulting soilcrete without excavation or destructive testing. Laboratory-scale experiments were conducted on simulated soilcrete columns using crosshole ultrasonic testing to evaluate the feasibility of acoustic tomography to characterize soilcrete geometry and quality. Data were acquired on multiple columns immediately after placement up to a curing time of 120 hours. Jet grout compressional wave velocity (VP) was estimated using a first arrival time approach and inverted to construct acoustic tomograms. Acoustic tomograms indicate that crosshole ultrasonic testing is able to characterize the changes in acoustic properties that result from jet-grout curing, locate contrasts between weaker/stronger regions in the jet grout, and estimate geometry of the column.zeige mehrzeige weniger

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Metadaten
Autor*innen:R.G. Bearce, M.A. Mooney, Ernst NiederleithingerORCiD, A. Revil
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Geo-congress 2014 technical papers (Proceedings)
Jahr der Erstveröffentlichung:2014
Herausgeber (Institution):American Society of Civil Engineers (ASCE)
Jahrgang/Band:234
Erste Seite:465
Letzte Seite:474
Freie Schlagwörter:Jet grouting; Ray tracing; Simulation; Tomography; Ultrasound
Veranstaltung:Geo-congress 2014
Veranstaltungsort:Atlanta, Georgia, USA
Beginndatum der Veranstaltung:23.02.2014
Enddatum der Veranstaltung:26.02.2014
DOI:10.1061/9780784413272.044
ISBN:978-0-7844-1327-2
Bemerkung:
Serientitel: Geotechnical Special Publication (GSP) – Series title: Geotechnical Special Publication (GSP)
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:20.02.2016
Referierte Publikation:Nein
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