A simplified design method for energy piles

Han long Liu, Cheng long Wang, Gang qiang Kong, Xuan ming Ding, Abdelmalek Bouazza

Research output: Contribution to journalArticleResearchpeer-review


This paper introduces a simplified method to investigate the influence of thermal loads on the shaft friction and tip resistance of energy piles. The method is based on the influence factors (λ and η) which are back-calculated drawing on a large number of field and model tests. Values for λ and η during heating and cooling are suggested. Moreover, a new equation is proposed to calculate total shaft friction. The equations concerning the relationship between η and temperature difference are recommended to investigate the impacts of the thermal load on the pile tip resistance. The slope of the linear equation of an end-bearing pile is 2.14 times that of a floating pile indicating that the pile tip resistance of an end-bearing pile is much more affected by the same thermal load.

Original languageEnglish
Pages (from-to)1605-1613
Number of pages9
JournalActa Geotechnica
Issue number5
Publication statusPublished - Oct 2019


  • Design method
  • Energy pile
  • Influence factor
  • Shaft friction
  • Tip resistance

Cite this

Liu, H. L., Wang, C. L., Kong, G. Q., Ding, X. M., & Bouazza, A. (2019). A simplified design method for energy piles. Acta Geotechnica, 14(5), 1605-1613. https://doi.org/10.1007/s11440-019-00849-z