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Titre :
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Use of impedance probe for estimation of porosity changes in saturated granular filters under cyclic loading : calibration and application (2010)
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Auteurs :
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Laricar Dominic O. Trani, Auteur ;
Buddhima Indraratna, Auteur
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Type de document :
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Article : texte imprimé
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Dans :
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Journal of geotechnical and geoenvironmental engineering (Vol. 136 N° 10, Octobre 2010)
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Article en page(s) :
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pp. 1469-1474
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Note générale :
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Géotechnique
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Langues :
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Anglais
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Index. décimale :
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624.1 (Infrastructures.Ouvrages en terre. Fondations. Tunnels)
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Tags :
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Soil properties Porosity Porous media Instrumentation Statistics Cyclic loads Filters Calibration
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Résumé :
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Gravimetric and volumetric sampling techniques are reliable for the measurement of porosity in fully saturated granular filters. However, both methods require a significant effort to gather and prepare samples, are time intensive to process, and do not capture real-time changes. Portable impedance probes serve as a valuable alternative to these destructive and laborious sampling methods. These probes measure the dielectric properties of the soil-water mixtures from which the porosity of filters may be inferred. This study demonstrates that generalized calibrations can result in large errors for porosity estimation when using diverse and small-scale filter types. By comparing with gravimetric and volumetric based porosity measurements for saturated granular filter porosity, impedance probes with filter-specific calibration offer the reliability and confidence owing to its reduced error in a quick, nondestructive fashion. This paper also presents the results of a laboratory investigation using an impedance probe to monitor real-time changes in the porosity of saturated granular filters subjected to cyclic train loading.
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DEWEY :
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624.1
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ISSN :
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1090-0241
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En ligne :
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http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JGGEFK&ONLINE=YES&smode=strresults&sort=chron&maxdisp=25&pjournals=JGGEFK&pyears=2010&possible1zone=article&fromyear=2010&frommonth=Oct&fromvolume=136&fromissue=10&OUTLOG=NO&sti=yes&viewabs=JGGE
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