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Heating piles combine the function of the foundation and the heat source. They acquire heat from the ground through in built the installation. Inside the installation is non-freezing liquid at low temperature. In connection with the above, piles and the surrounding soil are exposed to significant temperature changes. As a result of these changes, the mechanical parameters of the soil and the behavior of the pile and soil contact surface were changed. This affects directly the load capacity of the heating piles. To describe this effect, laboratory tests were carried out to determine the thermal and mechanical parameters of the soil at low temperatures. The results from laboratory tests were applied as material parameters in the Z_Soil program. Based on the analysis using the finite element method, it was found that there is an negative effect on the friction on the surface of pile associated with the heat transfer between the soil and the pile.

Determination of the heating pile numerical model parameters based on the laboratory strength tests of clay at low temperatures