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Volume 39 Issue 3
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LIU Wen-hua, YANG Qing, TANG Xiao-wei, UZUOKA Ryosuke. Numerical simulation of hydro-mechanical behaviors of unsaturated soils under fully undrained conditions[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(3): 486-494. DOI: 10.11779/CJGE201703012
Citation: LIU Wen-hua, YANG Qing, TANG Xiao-wei, UZUOKA Ryosuke. Numerical simulation of hydro-mechanical behaviors of unsaturated soils under fully undrained conditions[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(3): 486-494. DOI: 10.11779/CJGE201703012
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Numerical simulation of hydro-mechanical behaviors of unsaturated soils under fully undrained conditions

  • 1. School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;
    2. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;
    3. Department of Civil Engineering, The University of Tokushima, Tokushima 770-8506, Japan

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  • Received Date: December 27, 2015
  • Published Date: April 24, 2017
    Graphical Abstract
    • Abstract
  • Volume changes take place during the fully undrained compression tests on unsaturated soils. It is more difficult to simulate the undrained mechanical behaviors of unsaturated soils than those of saturated soils. In this study, the three-phase coupled governing equations for unsaturated soils under fully undrained conditions are derived using the porous medium theory and the elasto-plastic constitutive model for unsaturated soils. Numerical simulations of the fully undrained triaxial compression tests on unsaturated soils are performed based on the proposed three-phase coupled governing equations. The simulated results demonstrate that the proposed method predicts the hydraulic and mechanical behaviors (shear-induced volume compression, pore water pressure, pore air pressure and degree of saturation increase) of unsaturated soils accurately under the fully undrained conditions. The predictions of the fully undrained triaxial tests on unsaturated soils show good agreement with the test results obtained in literatures, verifying the applicability of the proposed method.
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    • References (21)
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