Hysteresis of unsaturated hydromechanical properties of a silty soil

Journal of Geotechnical and Geoenvironmental Engineering
Prepared in collaboration with Colorado School of Mines
By: , and 

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Abstract

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.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Hysteresis of unsaturated hydromechanical properties of a silty soil
Series title Journal of Geotechnical and Geoenvironmental Engineering
DOI 10.1061/(ASCE)GT.1943-5606.0000786
Volume 139
Issue 3
Year Published 2013
Language English
Publisher American Society of Civil Engineers
Contributing office(s) Geology and Geophysics Science Center
Description 4 p.
First page 507
Last page 510
Online Only (Y/N) N
Additional Online Files (Y/N) N