Numerical Modeling of Frozen Rockmass and Its Stress State in Sinking
V. N. Aptukov1,2, V. V. Tarasov1
1VNII Galurgii, Perm, 614000 Russia
2Perm State National Research University, Perm, 614000 Russia
Keywords: Artificial ground freezing, frozen wall formation, temperature fields, stress state, mathematical modeling
Abstract
The authors implement a new model of calculating temperature field and stresses in frozen rock mass at all successive stages of sinking: rock freezing, shafting, concrete lining and thawing. The model allows assessing dynamics of temperatures and stresses in rock mass, in frozen wall and in concrete lining at the freeze and thaw stages with regard to the thermophysical and mechanical properties of the materials. It is found that functioning of the freezing pipes in the same mode in depth is nonoptimal and leads to excessive energy consumption.
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