Coupled consolidation in unsaturated soils: An alternative approach to deriving the Governing Equations |
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| Institution: | 1. Imperial College London, Department of Civil & Environmental Engineering, London, UK;2. Geotechnical Consulting Group, London, UK;1. State Key Laboratory of Coastal & Offshore Engineering, Dalian University of Technology, Dalian 116024, China;2. School of Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China;1. Université de Lorraine, CNRS, LEMTA, F-54000 Nancy, France;2. Currently at MENARD Group, Paris, France;3. Currently at Franki Fondation, Paris, France;1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;2. Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering (Ministry of Education), Wuhan University, Wuhan 430072, China;3. Aramco Research Center, 16300 Park Row, Houston, TX 77084, USA;4. School of Civil Engineering and Architecture, Nanchang University, Nanchang 330031, China |
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| Abstract: | The equations governing coupled consolidation in unsaturated soils are known to contain additional parameters when compared to the equations for saturated soils. Nonetheless, the variation of these parameters with suction or degree of saturation is not generally agreed upon. The paper introduces a novel approach to deriving general equations for each of these parameters and their variation, and explains that, for consistency with the constitutive and soil-water retention curve models adopted, these general equations need to be transformed into case-specific expressions. Finally, a conceptual model is presented highlighting how the behaviour of unsaturated soil reflects aspects of its water content. |
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| Keywords: | Coupled consolidation Conceptual model Unsaturated |
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