A new version of the Thermo-Pile software allowing for the analysis and design of both single and groups of energy piles will soon be released!

Thermo-Pile Software

Thermo-Pile, is based on a discretization of the pile in a number of segments. It enables to consider various soil layers, as well as the variation of the soil properties and temperature with depth. An iterative procedure (finite difference scheme) allows quantifying the thermal strains and the associated additional efforts when the pile is subjected to both axial mechanical loading and temperature changes.

The procedure has been coded in the Java language. The numerical tool is based on the form of an interactive application with pop-up menus and windows for input data. Temperatures resulting from energy design of the heat-exchanger pile system can be used as input parameters of the present numerical tool. The calculation can be directly run and the results (stored in text files) can be visualized on various graphs plotted automatically, showing in particular the mobilized friction (with respect to the soil bearing capacity), the stresses in the pile (with respect to the pile structural resistance) and the deformations, for a given thermal loading.

Contact: lms@epfl.ch

Thermo-Pile 1.02

Thermo-Pile v1.02 is available in two different editions:

  • Enterprise Edition: this edition allows the use of Thermo-Pile as expertise or design tool. Enterprise Edition gives right to the commercial use of the software for private or public institutions.
  • Academic Edition: this edition is for academic institutions for a non-commercial use or education purpose only. When used in published studies, Thermo-Pile should be referred to as the producer of the corresponding results.

Don’t hesitate to have a look at the Thermo-Pile brochure for further pieces of information.


Interested by the Thermo-Pile software? Please fill in the Request Form and send it back to us by email to lms@epfl.ch or by fax +41 21 693 41 53. An offer will be prepared in the shortest delays. Request Form

Download the Trial Version

The package contains Thermo-Pile Trial version, V.1, March 2011 plus the technical documentation and the user’s guide. Note: This trial version is intended to give an overview of the software and not intended to produce results for design purpose.  

Copyright © 2011 EPFL LMS,  Version 1, March 2011.

    ♦ Thermopile Executive File (Example Input)

    ♦ Thermopile User’s Manual

    ♦ Thermopile Theory Reference

Universities and Companies currently employing Thermo-Pile

Technical University of Cluj-Napoca, Romania
Geotechnical Laboratory CEDEX, Spain
American University of Beirut, Lebanon
University of Akron, Ohio, United States
Geotechnical Engineering Laboratory, Yonsei Univeresity, Republic of Korea
Institute of Geotechnics and Hydrotechnology, Wroclaw University of Technology, Poland
Glenn Department of Civil Engineering, Clemson University, USA
Laboratoire de GéoMécanique, Université Libre de Bruxelles, Belgique
ECOME Entreprendre s.à.r.l., France
SAS Priser Forages Fondations de l’Ouest, France
Department of General Engineering, Montana Tech of the University of Montana, United States
De Cerenville Géotechnique, Switzerland

Related publications

• Rotta Loria A. F. and Laloui L. “The equivalent pier method for energy pile groups“. Géotechnique, DOI: 10.1680/jgeot.16.P.139.

• Mimouni T. and Laloui L. “Thermo-pile: a numerical tool for the design of energy piles“, in Energy Geostructures: Innovation in Underground Engineering, L. Laloui and A. Di Donna (eds.), ISTE Ltd. and John Wiley and Sons, Hoboken, p. 265-278, 2013.

• Mimouni T. and Laloui L. “Towards a Secure Basis for the Design of Geothermal Piles“. Acta Geotechnica, Vol. 9, Pages 355-366, 2014.

• Knellwolf C., Peron H. and Laloui L. “Geotechnical analysis of heat exchanger piles”. Journal of Geotechnical and Geoenvironmental Engineering, doi:10.1061/(ASCE)GT.1943-5606.0000513, 2011

• L. Laloui, A. Di Donna “Understanding the Thermo-Mechanical Behaviour of Energy Piles“. Civil Engineering, Vol. 164, Pages 184–191, 2011.

• Knellwolf C., Peron H. and Laloui L. “Geotechnical analysis of heat exchanger piles”. Journal of Geotechnical and Geoenvironmental Engineering, doi:10.1061/(ASCE)GT.1943-5606.0000513, 2011

 Laloui L., M. Nuth, L. Vulliet. “Experimental and numerical investigations of the behaviour of a heat exchanger pile”. International Journal of Numerical and Analytical Methods in Geomechanics, vol. 30(8), pp. 763-781, 2006

• Laloui L., M. Moreni, L. Vulliet. Comportement d’un pieu bi-fonction, fondation et échangeur de chaleur“. Canadian Geotechnical Journal, Vol 40, N. 2, pp. 388-402, 2003.

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