Experimental study on the mechanical behaviour of a heat exchanger pile using physical modelling - École des Ponts ParisTech Accéder directement au contenu
Article Dans Une Revue Acta Geotechnica Année : 2014

Experimental study on the mechanical behaviour of a heat exchanger pile using physical modelling

Neda Yavari
  • Fonction : Auteur
  • PersonId : 955753
Anh Minh A.M. Tang
Jean-Michel Pereira

Résumé

This study aims to provide knowledge on the thermo-mechanical behaviour of heat exchanger piles, through a laboratory scale model. The model pile (20 mm in external diameter) was embedded in dry sand. The behaviour of the axially loaded pile under thermal cycles was investigated. After applying the axial load on the pile head, the pile's temperature was varied between 5 °C and 30 °C. Seven tests, corresponding to various axial loads ranging from 0 to 70 % of the pile estimated bearing capacity, were performed. The results on pile head displacement show that heating under low axial load induced heave and cooling induced settlement; the pile temperature-displacement curve was found to be reversible and compatible with the thermal expansion curve of the pile. However, at higher axial loads, irreversible settlement of the pile head was observed after a few thermal cycles. The axial load profile measured by the strain gauges evidenced that the pile head load was mainly transferred to the pile toe. Nevertheless, thermal cycles modified significantly the mobilised skin friction along the pile. The total pressure measured at various locations in the soil mass was also slightly influenced by the thermal cycles.
Fichier principal
Vignette du fichier
Yavari_et_al_Actageotech_Vf.pdf (1.78 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01005344 , version 1 (12-06-2014)

Identifiants

Citer

Neda Yavari, Anh Minh A.M. Tang, Jean-Michel Pereira, Ghazi Hassen. Experimental study on the mechanical behaviour of a heat exchanger pile using physical modelling. Acta Geotechnica, 2014, 9 (3), pp.385-398. ⟨10.1007/s11440-014-0310-7⟩. ⟨hal-01005344⟩
618 Consultations
886 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More