Use of impedance probe for estimation of porosity changes in saturated granular filters under cyclic loading / Laricar Dominic O. Trani in Journal of geotechnical and geoenvironmental engineering, Vol. 136 N° 10 (Octobre 2010)  

Use of impedance probe for estimation of porosity changes in saturated granular filters under cyclic loading : calibration and application [texte imprimé] / Laricar Dominic O. Trani, Auteur ; Buddhima Indraratna, Auteur . - 2010 . - pp. 1469-1474.
Géotechnique
Langues : Anglais (eng)
in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 10 (Octobre 2010) . - pp. 1469-1474

Mots-clés :	Soil properties Porosity Porous media Instrumentation Statistics Cyclic loads Filters Calibration
Index. décimale :	624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels
Résumé :	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.
DEWEY :	624.1
ISSN :	1090-0241
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