Objective In order to understand the creep development law of frozen calcareous clay better,since the accurate calculation of frozen soil creep is very important for artificial freezing wall design.Methods The hyperbol-ic creep constitutive model of frozen calcareous clay,which reflected the influence of freezing temperature and stress loading grade,was established by uniaxial compression test and creep test on the unmodified calcareous clay from the depth of the shaft inspection hole of a certain mine in Huainan.The instantaneous strain,the creep loading stress and the strain-time curve of the creep test were substituted into the creep model formula and the parameters were solved.The creep model which described the instantaneous strain and the creep strain of the fro-zen calcareous clay was constructed and verified.In view of the non-uniformity of freezing temperature field,Monte Carlo method was used to analyze the reliability of the creep model considering the spatial variability of temperature parameters.The results showed that the established model predicted better the creep characteristics of frozen calcareous clay at low temperature and high stress level.Results The theoretical and experimental values in the calculated results had a high goodness of fit,convenient for practical engineering application.Conclusion It can provide a reference for the study of the stability of the frozen wall of calcareous clay.
Frozen calcareous claycreep modelhyperbolic modelMonte Carlo methodreliability analysis
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