Rheological numerical simulation for thermo-hydro-mechanical coupling analysis for rock mass |
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Authors: | WANG Zhi-yin XU Jie LI Yun-peng GUO Shu-tai AI Chuan-zhi |
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Affiliation: | 1. Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum, Beijing 102249, China; 2. China Petroleum Pipeline Engineering Corporation, Langfang 065000, China |
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Abstract: | Under the environment of seepage field, stress field and temperature field interaction and influence, the three fields will not only produce coupling effect, but also have deformation with time due to the rheological behavior of rock mass. In the paper, based on the fundamental theories of rock mass coupling theory and rheological mechanics, the rheological model for fully coupled thermo-hydro-mechanical analysis for rock mass was set up, and the corresponding constitutive relationship, the conservation equation of mass and the conservation equation of energy were given, and the finite element formulas were derived for coupling analysis of rock mass. During establishing governing equations, rock mass was assumed approximately as macro-equivalent continuum medium. The obtained rheological numerical model for fully coupled thermo-hydro-mechanical analysis can be used for analyzing and predicting the long-term stability of underground caverns and slope engineering under the condition of thermo-hydro-mechanical coupling with rheological deformation. |
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Keywords: | thermo-hydro-mechanical coupling rheological analysis FEM model rockmass |
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