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In recent years , with the wellbore through the increasingly thick alluvium in freezing sinking projects often happens outer wall damage, frozen pipe rupture and other accidents. Thus, in deep alluvium used freezing sinking , facing many new theories and solved key technologies. In order to solve the problems encountered walls interaction , the paper first measured data based on the three projects , the pressure has been frozen , freeze wall after wall deformation and the general rules of freezing and thawing permafrost ; secondly, through theoretical analysis and two on freezing pressure wall temperature field interactions exploratory research ; once again to Zhaogu a mine shaft as a prototype, using the finite element analysis software ANSYS establish reasonable simplified model , targeted research to freeze stress, deformation and wall after wall of frozen tundra thawing law factors , have been mechanics field, temperature field distribution variation , the inner surface of the frozen wall displacement and maximum radial section height , excavation functional relationship between time , the maximum temperature , maximum temperature , the wall after permafrost maximum melt into the mold temperature range , pouring time , the equivalent thermal conductivity of the foam board between the function ; Finally , simulation results are compared with the actual work to verify the numerical model is reasonable . This conclusion can be frozen after deep alluvium wall , wall design and construction to provide reference .
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