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Determining the Shear Strength of Unsaturated Silt
Summary In order to determine shear strength of fine-grained unsaturated soils, a new design of a shear box for a modified direct shear device is described where a desired matric suctions is added easily with a hanging column. Simple principles were employed to develop the direct shear testing device so that it would be robust, easy to use, and readily assembled and disassembled for testing and maintenance. Tests were conducted with sandy silts under several net normal stresses (σn ua) for different desired matric suction (ua–uw). The results show that unsaturated shear strength and friction angle (πb) is consistent with results from prediction procedure (Fredlund and Barbour 1996) and estimated friction angle (πb) based on a soil-water characteristic curve (SWCC) of the sandy silt, respectively.
Determining the Shear Strength of Unsaturated Silt
Summary In order to determine shear strength of fine-grained unsaturated soils, a new design of a shear box for a modified direct shear device is described where a desired matric suctions is added easily with a hanging column. Simple principles were employed to develop the direct shear testing device so that it would be robust, easy to use, and readily assembled and disassembled for testing and maintenance. Tests were conducted with sandy silts under several net normal stresses (σn ua) for different desired matric suction (ua–uw). The results show that unsaturated shear strength and friction angle (πb) is consistent with results from prediction procedure (Fredlund and Barbour 1996) and estimated friction angle (πb) based on a soil-water characteristic curve (SWCC) of the sandy silt, respectively.
Determining the Shear Strength of Unsaturated Silt
Sun, Shulin (author) / Xu, Huifang (author)
2007-01-01
12 pages
Article/Chapter (Book)
Electronic Resource
English
unsaturated soil , matric suction , direct shear , shear strength , shear box Engineering , Theoretical and Applied Mechanics , Engineering Fluid Dynamics , Geotechnical Engineering & Applied Earth Sciences , Hydrogeology , Appl.Mathematics/Computational Methods of Engineering , Classical Continuum Physics
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