Theoretical Undrained Shear Behaviour of Unsaturated Soils
نویسندگان
چکیده
Prediction method for undrained shear behaviour of unsaturated soils is discussed in this paper. Based on Original Cam Clay model, authors have proposed constitutive model for unsaturated soils that the effect of water content is incorporated into superloading surface concept. Firstly, stress path of constant volume shear test is formulated under constant void ratio condition. And relationship between water content, dry density and constant volume shear strength is also derived. Secondary, calculation method of undrained shear tests is studied. In the case of unsaturated specimen, volume of the specimen changes with shear deformation and stress paths depend on initial degree of saturation. The calculation results described the tendency of test results qualitatively by considering the change in effective confining pressure in undrained condition and water retention curve.
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