Interactions between energy piles caused by temperature

A new simplified method is proposed to estimate the zero point of displacement variation, assuming that the pile shaft and end resistance are in the elastic stage. The additional pile axial force was calculated by using the proposed method. The temperature distribution among surrounding soils was estimated by using the finite-line-source model. The temperature distribution obtained by the proposed method was compared with that obtained by the finite-element model, and a good agreement was obtained. A method for estimating the interaction caused by heating between energy piles is proposed, and a comparison between the calculated results obtained by the proposed method and those obtained using Abaqus software on energy piles was done to verify the accuracy of the proposed method. It is shown that reasonable predictions about interaction between energy piles can be made without expensive and time-consuming analyses by means of the method proposed in this paper.