Relationship between the Soil-Water Characteristic Curve and the Suction Stress Characteristic Curve: Experimental Evidence from Residual Soils

Title
Relationship between the Soil-Water Characteristic Curve and the Suction Stress Characteristic Curve: Experimental Evidence from Residual Soils
Author(s)
오세붕Ning Lu[Ning Lu]김윤기[김윤기]이성진[이성진]이승래[이승래]
Keywords
UNSATURATED SOILS; SHEAR-STRENGTH; MATRIC SUCTION
Issue Date
201201
Publisher
ASCE-AMER SOC CIVIL ENGINEERS
Citation
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, v.138, no.1, pp.47 - 57
Abstract
The part of effective stress resulting from soil moisture or soil suction variation can be defined by the suction stress characteristic curve (SSCC). For a given soil, the SSCC can be experimentally determined from shear-strength tests. Recent work shows that the SSCC can be uniquely linked to the soil-water characteristic curve (SWCC). The uniqueness of the SSCC determined from both shear strength and soil moisture retention tests is examined for several residual soils in Korea. The validity of the effective stress principle is demonstrated by showing that effective stress-based on the SSCC describes the same unique failure criterion as that for the saturated failure criterion. The measured SSCCs are also shown to predict the soil-water retention curves within a few percentage. The SWCCs of these residual soils, determined directly from soil moisture retention tests, also accord well with the SSCCs determined directly from triaxial shear-strength tests with the difference within several tens of kPa. Therefore, we show that the suction stress characteristic curve or soil-water retention curve alone can be used to describe both the effective stress and soil-water retention characteristics of variably saturated soils. DOI: 10.1061/(ASCE)GT.1943-5606.0000564. (C) 2012 American Society of Civil Engineers.
URI
http://hdl.handle.net/YU.REPOSITORY/30011http://dx.doi.org/10.1061/(ASCE)GT.1943-5606.0000564
ISSN
1090-0241
Appears in Collections:
공과대학 > 건설시스템공학과 > Articles
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