Engineering performance of energy foundations

John S. McCartney

In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical Engineering

Session: Keynote/Theme Papers

ABSTRACT: Drilled shaft foundations with embedded heat exchangers (energy foundations) have gained attention by employing materials to not only provide structural support but also improve the energy efficiency of heat pump systems. Data on the thermal and mechanical performance of energy foundations obtained through analysis, field testing, and centrifuge modeling will be summarized. Focus will be provided on the modification and validation of soil-structure interaction analyses needed to predict thermally-induced movements and changes in ultimate capacity. Relevant issues to consider in the design and construction of energy foundations will be discussed, along with methods to define material properties for analysis.

RÉSUMÉ: Fondations de l'énergie ont retenu l'attention en employant des matériaux non seulement de fournir un soutien structurel, mais aussi d'améliorer l'efficacité énergétique des systèmes de pompe à chaleur. Les données sur les performances thermiques et mécaniques des fondations de l'énergie obtenue par l'analyse, essais sur le terrain, et la modélisation centrifugeuse seront résumés. L'accent sera fournie sur la modification et la validation des analyses d'interaction sol-structure nécessaire pour prévoir les mouvements thermiquement induits et des changements dans la capacité ultime. Les questions pertinentes à considérer dans la conception et la construction des fondations de l'énergie seront abordées, ainsi que des méthodes pour définir les propriétés du matériau pour l'analyse.

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