The Influencing Factor on Test of Parameter of the Rock-Soil Thermal Properties

In this paper, the principle of a measuring device on thermal response test is introduced and a three-dimensional numerical model is developed. What´s more, the effect of testing time, starting time point, ending time point and volumetric specific heat on the calculation results of the thermal response test by two variable parameter fitting method and three-dimensional numerical model are also discussed. It is validated that the volumetric specific heat is not sensitive to the thermal conductivity of the soil and has a little effect on borehole thermal resistance. The initial soil temperature, the end data point and start data point all affect the thermal conductivity and borehole thermal resistance to some extent. An enough length of testing time should be remained.