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Prediction of Shear Strength for Unsaturated Soils under Drying and Wetting Processes
Anuchit Uchaipichat Department of Civil Engineering, Vongchavalitkul University, Nakhon Ratchasima, 30000, Thailand
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ABSTRACT |
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Prediction of Shear Strength for Unsaturated Soils under Drying and Wetting Processes
Anuchit Uchaipichat Department of Civil Engineering, Vongchavalitkul University, Nakhon Ratchasima, 30000, Thailand
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ABSTRACT |
An experimental research program of shear tests is conducted on a compacted kaolin using a conventional triaxial equipment modified for testing unsaturated soils. The modified triaxial cell is capable of independent measurement and control of pore air and pore water pressures at the top and the bottom boundaries of the specimen. The suction values varied from 0 to 300 kPa. The experimental results show the difference in relationships between shear strength and suction for drying and wetting processes. The shear strength predictions using simple failure equations for unsaturated soil in the literature are compared with the experimental results. The predictive capability of the proposed failure equations is discussed.
Keywords: unsaturated Soils; shear strength; triaxial tests; drying; wetting
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