Isogeometric analysis of THM coupled processes in ground freezing |
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| Institution: | 1. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;2. Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita ku, Sapporo 060-8628, Japan;1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;2. State Key Laboratory of Frozen Soil Engineering, Lanzhou 730000, China |
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| Abstract: | An isogeometric analysis (IGA) based numerical model is presented for simulation of thermo-hydro-mechanically (THM) coupled processes in ground freezing. The momentum, mass and energy conservation equations are derived based on porous media theory. The governing equations are supplemented by a saturation curve, a hydraulic conductivity model and constitutive equations. Variational and Galerkin formulation results in a highly nonlinear system of equations, which are solved using Newton-Raphson iteration. Numerical examples on isothermal consolidation in plane strain, one-dimensional freezing and heave due to a chilled pipeline are presented. Reasonably good agreements were observed between the IGA based heave simulations and experimental results. |
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| Keywords: | Isogeometric analysis THM coupling Porous media Ground freezing |
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