Research on visco-elastic-plastic creep model of artificially frozen soil under high confining pressures |
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Authors: | Dong-Wei LiAuthor Vitae Ju-Hong FanRen-He Wang |
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Affiliation: | a Engineering Research Center of Mining Underground Engineering, Ministry of Education, Huainan 232001, Chinab Key laboratory of mine building in Universities of Anhui , Huainan 232001, Chinac College of Civil Engineering and Architecture; Anhui University of Science and Technology, Huainan 232001, China |
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Abstract: | The triaxial creep experiment of artificially frozen soil in deep alluvium was performed by a self-developed machine of triaxial creep frozen soil. After analyzing the experiment results, applying parabolic yield criterion for improved viscoplasticity in the Nishihara model, a new creep constitutive model was established for describing frozen-soil's creep characteristics under high confining pressures. The secondary development tools and data interface had been used to add the visco-elastic-plastic creep constitutive model to standard ADINA FEM. Numerical simulation of the shaft well excavation process and field measurement displacements of frozen wall were performed in the mine; and the results showed that the visco-elastic-plastic creep constitutive model was suitable and reasonable. This constitutive model could be significance for the frozen soil structure long-term stability analysing and the displacement forecasting. |
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Keywords: | High confining pressures ADINA FEM Parabolic yield criterion Visco-elastic-plastic model Artificially frozen soil Secondary development |
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