Abstract：During the coupling analysis of moisture field and temperature field in freezing soil by using artificial multi-freezing-tube cycles，a lot of factors should be considered，including multi-fields and nonlinear problems，etc.. Their relations are complicated. The model tests of freezing process with multi-freezing-tube cycles are conducted. The regulation of variation of temperature field and moisture field with freezing time are obtained. It is proved that the temperature is the source of variation of moisture field；and the hydro-thermal coupling dominant equation is proposed. The finite element method is used to carry out hydro-thermal coupling movement with the hydro-thermal coupling parameters being solved simultaneously. It can simulate the characters of temperature forming and development，freezing moisture field transferring，as well as the coupling relation of the two fields. The results of numerical simulations and model tests have good coincidence. The hydro-thermal coupling analysis in this study has important reference to designing and optimizing freezing wall. The results have promotion role for both technological progress and theoretical development of shaft sinking by artificial freezing process with multi-freezing-tube-cycles in thick overburden.
