Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Long-term thermo-mechanical behaviour of energy piles in clay

Abstract : In engineering practice, energy pile foundations are often designed for the lifetime of the building. Thermal exchange between a pile and the surrounding soil depends on the annual energy needs of the building, as heating mode in winter and cooling mode in summer. Thus, energy pile foundations will undergo a heating–cooling cycle per year. In the present work, an experimental method based on a small-scale pile model installed in saturated clay was used to study the thermo-mechanical behaviour of energy piles under thermal cycles. Thirty cycles were applied (to represent a 30-year period if the daily cycles are neglected) while a constant pile head load was maintained. Four tests were performed corresponding to pile head loads equal to 0, 20, 40 and 60% of pile resistance. The results obtained show an increase in irreversible pile head settlement with the thermal cycles. In order to interpret the experimental results better, the finite-element method is used to simulate the experiments numerically. This allows the important role of pile thermal contraction/expansion in the pile–soil interaction under thermo-mechanical loading to be highlighted.
Type de document :
Article dans une revue
Liste complète des métadonnées

Littérature citée [43 références]  Voir  Masquer  Télécharger
Contributeur : Anh Minh TANG Connectez-vous pour contacter le contributeur
Soumis le : mardi 23 juin 2020 - 17:38:48
Dernière modification le : vendredi 30 septembre 2022 - 04:10:12


Nguyen et al_R3_v01_ResearchGa...
Fichiers produits par l'(les) auteur(s)



van Tri Nguyen, Nanwangzi Wu, Yixiang Gan, Jean-Michel Pereira, Anh Minh A.M. Tang. Long-term thermo-mechanical behaviour of energy piles in clay. Environmental Geotechnics, ICE-Publishing, In press, ⟨10.1680/jenge.17.00106⟩. ⟨hal-02879341⟩



Consultations de la notice


Téléchargements de fichiers