Abstract: The thermal physical properties of eight (8) soils collected from Fengxian District of Shanghai were laboratory evaluated under the effects of temperature and the coupling effect of temperature-deadweight stress. The changes of thermal conductivity, specific heat capacity and thermal diffusivity of different soils under the coupling effect of temperature and temperature-deadweight stress were studied respectively. The results show that the thermal conductivity and the thermal diffusivity ranking from high to low are sandy silt, silty clay and clay respectively, and their specific heat capacities are opposite ranked. The value of thermal conductivity, thermal diffusion coefficient and temperature are directly proportional to the value of specific heat capacity and temperature value is inversely relationship; under the coupling effect, the maximum thermal conductivity can be increased by 9.8%, the maximum specific heat capacity can be decreased by 25.4%, and the maximum thermal diffusivity can be increased by 28.1%.

Key words: temperature, gravity stress, thermal properties, energy piles