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AuthorElzeiny, Rehab
AuthorSuleiman, Muhannad T.
AuthorXiao, Suguang
AuthorQamar, Mu’Ath Abu
AuthorAl-Khawaja, Mohammed
Available date2024-04-22T11:15:34Z
Publication Date2020-01-14
Publication NameCanadian Geotechnical Journal
Identifierhttp://dx.doi.org/10.1139/cgj-2019-0143
CitationElzeiny, R., Suleiman, M. T., Xiao, S., Qamar, M. A. A., & Al-Khawaja, M. (2020). Laboratory-scale pull-out tests on a geothermal energy pile in dry sand subjected to heating cycles. Canadian Geotechnical Journal, 57(11), 1754-1766.
ISSN0008-3674
URIhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85094668319&origin=inward
URIhttp://hdl.handle.net/10576/54064
AbstractGround source heat pumps coupled with energy piles operate intermittently, subjecting the piles to temperature cycles throughout their lifetime. The research presented in this paper focuses on studying the thermomechanical behavior of energy piles subjected to heating cycles. Laboratory model tests were performed at the soil-structure interaction (SSI) facility at Lehigh University. A fully instrumented model energy pile, embedded in dry sand, was subjected to different number of heating cycles followed by axial pull-out loading. Baseline (room temperature), five heating cycles (5HC), and 100 heating cycles (100HC) tests are reported in this paper. The soil was instrumented with temperature sensors and pressure sensors, while the pile was instrumented with temperature sensors, strain gauges, and pressure sensors. The test results showed that the peak pull-out loads for the baseline, 5HC, and 100HC were 2794 N, 3633 N (30% higher than baseline), and 3559 N (27% higher than baseline), respectively. It was also found that subjecting the pile to large number of daily heating cycles induced small degradation in the load transfer or the peak pull-out load in dry sand.
SponsorThe work described in this paper was part of a research program on geothermal energy piles funded by National Priority Research Program of Qatar (project number: NPRP 7-725-2-270).
Languageen
PublisherNational Research Council of Canada
SubjectHeating cycles
Model energy pile
Pile–soil radial pressures
Pull-out tests
Soil–pile interaction
Thermal radial expansion
TitleLaboratory-scale pull-out tests on a geothermal energy pile in dry sand subjected to heating cycles
TypeArticle
Pagination1754-1766
Issue Number11
Volume Number57
ESSN1208-6010
dc.accessType Abstract Only


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