[article] 
inJournal of geotechnical and geoenvironmental engineering > Vol. 139 N° 3 (Mars 2013) . - pp. 507-510

Titre :	Hysteresis of unsaturated hydromechanical properties of a silty soil
Type de document :	texte imprimé
Auteurs :	Ning Lu, Auteur ; Murat Kaya, Auteur ; Brian D. Collins, Auteur
Année de publication :	2013
Article en page(s) :	pp. 507-510
Note générale :	geotechnique
Langues :	Anglais (eng)
Mots-clés :	unsaturated soils  soil suction  hydraulic conductivity  water  hysteresis  silts  mechanical properties
Résumé :	Laboratory tests to examine hysteresis in the hydrologic and mechanical properties of partially saturated soils were conducted on six intact specimens collected from a landslide-prone area of Alameda County, California. The results reveal that the pore-size distribution parameter remains statistically unchanged between the wetting and drying paths; however, the wetting or drying state has a pronounced influence on the water-entry pressure, the water-filled porosity at zero suction, and the saturated hydraulic conductivity. The suction stress values obtained from the shear-strength tests under both natural moisture and resaturated conditions were mostly bounded by the suction stress characteristic curves (SSCCs) obtained from the hydrologic tests. This finding experimentally confirms that the soil-water retention curve, hydraulic conductivity function, and SSCC are intrinsically related.
En ligne :	http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000786

[article] Hysteresis of unsaturated hydromechanical properties of a silty soil [texte imprimé] / Ning Lu, Auteur ; Murat Kaya, Auteur ; Brian D. Collins, Auteur . - 2013 . - pp. 507-510.
geotechnique
Langues : Anglais (eng)
in Journal of geotechnical and geoenvironmental engineering > Vol. 139 N° 3 (Mars 2013) . - pp. 507-510

Mots-clés :	unsaturated soils  soil suction  hydraulic conductivity  water  hysteresis  silts  mechanical properties
Résumé :	Laboratory tests to examine hysteresis in the hydrologic and mechanical properties of partially saturated soils were conducted on six intact specimens collected from a landslide-prone area of Alameda County, California. The results reveal that the pore-size distribution parameter remains statistically unchanged between the wetting and drying paths; however, the wetting or drying state has a pronounced influence on the water-entry pressure, the water-filled porosity at zero suction, and the saturated hydraulic conductivity. The suction stress values obtained from the shear-strength tests under both natural moisture and resaturated conditions were mostly bounded by the suction stress characteristic curves (SSCCs) obtained from the hydrologic tests. This finding experimentally confirms that the soil-water retention curve, hydraulic conductivity function, and SSCC are intrinsically related.
En ligne :	http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000786