Modeling Unsaturated Soil Response Under Suction-controlled Multi-axial Stress States

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Modeling Unsaturated Soil Response Under Suction-controlled Multi-axial Stress States

Show simple item record Laikram, Arthit en_US 2008-04-22T02:41:27Z 2008-04-22T02:41:27Z 2008-04-22T02:41:27Z December 2007 en_US
dc.identifier.other DISS-1926 en_US
dc.description.abstract In this research work, a novel suction-controlled true triaxial testing apparatus has been developed to test 3-in (7.5-cm) side, cubical specimens of unsaturated soil under controlled-suction states for a wide range of stress paths that are not easily achievable in a conventional cylindrical apparatus. The equipment is a mixed-boundary type of device, with the specimen seated on top of a high-air-entry ceramic disk and between five flexible (latex) membranes on the remaining sides of the cube. The new cell is an upgraded, more elaborate version of the one previously reported by Hoyos (1998), featuring two independent pore-air and pore-water pressure control systems via a PCP-5000-UNSAT pressure panel. Matric suction states in the specimens are induced during testing via the axis-translation technique. The technique is implemented by utilizing the s = ua testing concept (uw = 0). The paper outlines the full development of the new cell, including details of its main components and the step-by-step assembling process. Results from a series of constant-suction hydrostatic compression (HC), conventional triaxial compression (CTC), triaxial compression (TC), and triaxial extension (TE) tests on lightly compacted silty sand are presented. An attempt was made to calibrate and validate the Barcelona model (Alonso et al. 1990) using results from CTC and TC tests. The operational true triaxial apparatus will play a fundamental role in the complete characterization of unsaturated soil behavior under multiaxial stress paths that are likely to be experienced in the field. en_US
dc.description.sponsorship Hoyos, Laureano en_US
dc.language.iso EN en_US
dc.publisher Civil & Environmental Engineering en_US
dc.title Modeling Unsaturated Soil Response Under Suction-controlled Multi-axial Stress States en_US
dc.type Ph.D. en_US
dc.contributor.committeeChair Hoyos, Laureano en_US Civil & Environmental Engineering en_US Civil & Environmental Engineering en_US University of Texas at Arlington en_US doctoral en_US Ph.D. en_US
dc.identifier.externalLinkDescription Link to Research Profiles

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