Effect of temperature induced excess porewater pressures on the shaft bearing capacity of geothermal piles

Changes in temperature in clays of low permeability typically induce excess porewater pressures. In the context of geothermal piles this effect has typically been overlooked since most installations have occurred in soils with higher values of permeability. A parametric study is presented that solve...

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Autores: Fuentes, Raúl, Pinyol Puigmartí, Núria Mercè|||0000-0002-1878-1365, Alonso Pérez de Agreda, Eduardo|||0000-0003-2472-3951
Formato: artículo
Fecha de publicación:2016
País:España
Recursos:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/102754
Acesso em linha:https://hdl.handle.net/2117/102754
https://dx.doi.org/10.1016/j.gete.2016.10.003
Access Level:acceso abierto
Palavra-chave:Geothermal engineering
Piles
Geothermal
Bearing capacity
Enginyeria geotèrmica
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
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repository_id_str
spelling Effect of temperature induced excess porewater pressures on the shaft bearing capacity of geothermal pilesFuentes, RaúlPinyol Puigmartí, Núria Mercè|||0000-0002-1878-1365Alonso Pérez de Agreda, Eduardo|||0000-0003-2472-3951Geothermal engineeringPilesGeothermalBearing capacityEnginyeria geotèrmicaÀrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòlsChanges in temperature in clays of low permeability typically induce excess porewater pressures. In the context of geothermal piles this effect has typically been overlooked since most installations have occurred in soils with higher values of permeability. A parametric study is presented that solves the governing differential equations one dimensionally in a pile to study the influence of the various parameters: temperature of the fluid, permeability and soil compressibility. A new shaft resistance reduction ratio has been also defined to illustrate the loss of bearing capacity. The study shows that when the value of permeability is 1E-11 m/s or lower, combined with a soil compressibility in excess of 20,000 MPa, the developed excess porewater pressures can potentially reduce the effective stress locally to very low values. The solution applied to the case of the Lambeth College, London, also provides a plausible explanation to the observed loss of shaft friction of the tested pile.Peer ReviewedElsevier20162016-12-0120172017-03-21journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/102754https://dx.doi.org/10.1016/j.gete.2016.10.003reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/1027542026-05-27T15:37:01Z
dc.title.none.fl_str_mv Effect of temperature induced excess porewater pressures on the shaft bearing capacity of geothermal piles
title Effect of temperature induced excess porewater pressures on the shaft bearing capacity of geothermal piles
spellingShingle Effect of temperature induced excess porewater pressures on the shaft bearing capacity of geothermal piles
Fuentes, Raúl
Geothermal engineering
Piles
Geothermal
Bearing capacity
Enginyeria geotèrmica
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
title_short Effect of temperature induced excess porewater pressures on the shaft bearing capacity of geothermal piles
title_full Effect of temperature induced excess porewater pressures on the shaft bearing capacity of geothermal piles
title_fullStr Effect of temperature induced excess porewater pressures on the shaft bearing capacity of geothermal piles
title_full_unstemmed Effect of temperature induced excess porewater pressures on the shaft bearing capacity of geothermal piles
title_sort Effect of temperature induced excess porewater pressures on the shaft bearing capacity of geothermal piles
dc.creator.none.fl_str_mv Fuentes, Raúl
Pinyol Puigmartí, Núria Mercè|||0000-0002-1878-1365
Alonso Pérez de Agreda, Eduardo|||0000-0003-2472-3951
author Fuentes, Raúl
author_facet Fuentes, Raúl
Pinyol Puigmartí, Núria Mercè|||0000-0002-1878-1365
Alonso Pérez de Agreda, Eduardo|||0000-0003-2472-3951
author_role author
author2 Pinyol Puigmartí, Núria Mercè|||0000-0002-1878-1365
Alonso Pérez de Agreda, Eduardo|||0000-0003-2472-3951
author2_role author
author
dc.subject.none.fl_str_mv Geothermal engineering
Piles
Geothermal
Bearing capacity
Enginyeria geotèrmica
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
topic Geothermal engineering
Piles
Geothermal
Bearing capacity
Enginyeria geotèrmica
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
description Changes in temperature in clays of low permeability typically induce excess porewater pressures. In the context of geothermal piles this effect has typically been overlooked since most installations have occurred in soils with higher values of permeability. A parametric study is presented that solves the governing differential equations one dimensionally in a pile to study the influence of the various parameters: temperature of the fluid, permeability and soil compressibility. A new shaft resistance reduction ratio has been also defined to illustrate the loss of bearing capacity. The study shows that when the value of permeability is 1E-11 m/s or lower, combined with a soil compressibility in excess of 20,000 MPa, the developed excess porewater pressures can potentially reduce the effective stress locally to very low values. The solution applied to the case of the Lambeth College, London, also provides a plausible explanation to the observed loss of shaft friction of the tested pile.
publishDate 2016
dc.date.none.fl_str_mv 2016
2016-12-01
2017
2017-03-21
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/102754
https://dx.doi.org/10.1016/j.gete.2016.10.003
url https://hdl.handle.net/2117/102754
https://dx.doi.org/10.1016/j.gete.2016.10.003
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,223283

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