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Volume 43 Issue S2
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WANG Lu-jun, WANG Peng, ZHU Bin, YE Zhi-gang, XU Wen-jie, CHEN Yun-min. Thermo-hydro-mechanical coupling analysis model for unsaturated soils with high degree of saturation and its verification[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 32-35. DOI: 10.11779/CJGE2021S2008
Citation: WANG Lu-jun, WANG Peng, ZHU Bin, YE Zhi-gang, XU Wen-jie, CHEN Yun-min. Thermo-hydro-mechanical coupling analysis model for unsaturated soils with high degree of saturation and its verification[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 32-35. DOI: 10.11779/CJGE2021S2008
shu

Thermo-hydro-mechanical coupling analysis model for unsaturated soils with high degree of saturation and its verification

  • 1.

    Key Laboratory of Soft Soils and Geoenvironmental Engineering of the Ministry of Education, Zhejiang University, Hangzhou 310058, China

  • 2.

    Center for Hypergravity Experimental and Interdisciplinary Research, Zhejiang University, Hangzhou 310058, China

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  • Received Date: August 12, 2021
  • Available Online: December 05, 2022
    Graphical Abstract
    • Abstract
  • Unsaturated soils with high saturation (USHS) are widely distributed around the coastal areas and rivers / lakes in China, whose internal free bubbles are sensitive to temperature and pressure, causing complex thermo-hydro-mechanical (THM) coupling responses and subsequent changes of soil compression and seepage characteristics. Based on the FEM platform OpenGeoSys, the governing equations for saturated soils are expanded to be applied for USHS by introducing the gas mass equation. The Clapeyron, Kelvin-Laplace and other equations are embedded, and a THM coupling model for USHS is established, thus enriching the processes and functions of OpenGeoSys. Verification cases are carried out by comparing with the experimental and numerical results, and then the coupling behaviors of USHS are further explored. It is revealed that the consolidation process of soils can be significantly affected by closed bubbles. When temperature and pressure change, the pressure dissipation dominates initially, whereas accumulates and reaches the peak with heat transfer and enhancement. The gas diffusion can be accelerated by temperature rise, meaning greater pressure dissipation rate accompanied by higher temperature.
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    • References (12)
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