The studies focused on the thermal-mechanical behavior under cycle thermal load with a working load are relative little. Based on the laboratory model test method

this study aims to study the heat transfer performance and bearing characteristics of the pile under working load when cycle thermal load is applied. The temperature of pile and surrounding soil

horizontal soil pressure

thermal strain and pile head settlement are measured. The results show that the temperature of pile and surrounding soil varies little; and horizontal soil pressure recovers nearly to initial value after cycling. Moreover

it is also shown that a little residual strain will be produced in the pile

and the settlement will accumulate as the cycle thermal load is applied

so as to influence the bearing characteristics of structure.