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contributor authorNing Lu
contributor authorWilliam J. Likos
date accessioned2017-05-08T21:28:28Z
date available2017-05-08T21:28:28Z
date copyrightFebruary 2006
date issued2006
identifier other%28asce%291090-0241%282006%29132%3A2%28131%29.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/52847
description abstractThe concept of the suction stress characteristic curve (SSCC) for unsaturated soil is presented. Particle-scale equilibrium analyses are employed to distinguish three types of interparticle forces: (1) active forces transmitted through the soil grains; (2) active forces at or near interparticle contacts; and (3) passive, or counterbalancing, forces at or near interparticle contacts. It is proposed that the second type of force, which includes physicochemical forces, cementation forces, surface tension forces, and the force arising from negative pore-water pressure, may be conceptually combined into a macroscopic stress called suction stress. Suction stress characteristically depends on degree of saturation, water content, or matric suction through the SSCC, thus paralleling well-established concepts of the soil–water characteristic curve and hydraulic conductivity function for unsaturated soils. The existence and behavior of the SSCC are experimentally validated by considering unsaturated shear strength data for a variety of soil types in the literature. Its characteristic nature and a methodology for its determination are demonstrated. The experimental evidence shows that both Mohr–Coulomb failure and critical state failure can be well represented by the SSCC concept. The SSCC provides a potentially simple and practical way to describe the state of stress in unsaturated soil.
publisherAmerican Society of Civil Engineers
titleSuction Stress Characteristic Curve for Unsaturated Soil
typeJournal Paper
journal volume132
journal issue2
journal titleJournal of Geotechnical and Geoenvironmental Engineering
identifier doi10.1061/(ASCE)1090-0241(2006)132:2(131)
treeJournal of Geotechnical and Geoenvironmental Engineering:;2006:;Volume ( 132 ):;issue: 002
contenttypeFulltext


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