Numerical analysis of rapid drawdown: applications in real cases

In this study, rapid drawdown scenarios were analyzed by means of numerical examples as well as modeling of real cases with in situ measurements. The aim of the study was to evaluate different approaches available for calculating pore water pressure distributions during and after a drawdown. To do t...

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Detalles Bibliográficos
Autores: Alonso Pérez de Agreda, Eduardo|||0000-0003-2472-3951, Pinyol Puigmartí, Núria Mercè|||0000-0002-1878-1365
Tipo de recurso: artículo
Fecha de publicación:2016
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/101652
Acceso en línea:https://hdl.handle.net/2117/101652
https://dx.doi.org/10.1016/j.wse.2016.11.003
Access Level:acceso abierto
Palabra clave:Landslides
Hydro-mechanical coupling
Coupled flow-deformation analysis
Numerical analysis
Drawdown
Landslide
Pore water pressure
Esllavissades
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
id ES_8ebb08e2cd0ff771072644bc45a27cdc
oai_identifier_str oai:upcommons.upc.edu:2117/101652
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spelling Numerical analysis of rapid drawdown: applications in real casesAlonso Pérez de Agreda, Eduardo|||0000-0003-2472-3951Pinyol Puigmartí, Núria Mercè|||0000-0002-1878-1365LandslidesHydro-mechanical couplingCoupled flow-deformation analysisNumerical analysisDrawdownLandslidePore water pressureEsllavissadesÀrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòlsIn this study, rapid drawdown scenarios were analyzed by means of numerical examples as well as modeling of real cases with in situ measurements. The aim of the study was to evaluate different approaches available for calculating pore water pressure distributions during and after a drawdown. To do that, a single slope subjected to a drawdown was first analyzed under different calculation alternatives, and numerical results were discussed. Simple methods, such as undrained analysis and pure flow analysis, implicitly assuming a rigid soil skeleton, lead to significant errors in pore water pressure distributions when compared with coupled flow-deformation analysis. A similar analysis was performed for the upstream slope of the Glen Shira Dam, Scotland, and numerical results were compared with field measurements during a controlled drawdown. Field records indicate that classical undrained calculations are conservative but unrealistic. Then, a recent case of a major landslide triggered by a rapid drawdown in a reservoir was interpreted. A key aspect of the case was the correct characterization of permeability of a representative soil profile. This was achieved by combining laboratory test results and a back analysis of pore water pressure time records during a period of reservoir water level fluctuations. The results highlight the difficulty of predicting whether the pore water pressure is overestimated or underestimated when using simplified approaches, and it is concluded that predicting the pore water pressure distribution in a slope after a rapid drawdown requires a coupled flow-deformation analysis in saturated and unsaturated porous media.Peer Reviewed20162016-07-0120172017-02-27journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/101652https://dx.doi.org/10.1016/j.wse.2016.11.003reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2http://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/1016522026-05-27T15:37:01Z
dc.title.none.fl_str_mv Numerical analysis of rapid drawdown: applications in real cases
title Numerical analysis of rapid drawdown: applications in real cases
spellingShingle Numerical analysis of rapid drawdown: applications in real cases
Alonso Pérez de Agreda, Eduardo|||0000-0003-2472-3951
Landslides
Hydro-mechanical coupling
Coupled flow-deformation analysis
Numerical analysis
Drawdown
Landslide
Pore water pressure
Esllavissades
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
title_short Numerical analysis of rapid drawdown: applications in real cases
title_full Numerical analysis of rapid drawdown: applications in real cases
title_fullStr Numerical analysis of rapid drawdown: applications in real cases
title_full_unstemmed Numerical analysis of rapid drawdown: applications in real cases
title_sort Numerical analysis of rapid drawdown: applications in real cases
dc.creator.none.fl_str_mv Alonso Pérez de Agreda, Eduardo|||0000-0003-2472-3951
Pinyol Puigmartí, Núria Mercè|||0000-0002-1878-1365
author Alonso Pérez de Agreda, Eduardo|||0000-0003-2472-3951
author_facet Alonso Pérez de Agreda, Eduardo|||0000-0003-2472-3951
Pinyol Puigmartí, Núria Mercè|||0000-0002-1878-1365
author_role author
author2 Pinyol Puigmartí, Núria Mercè|||0000-0002-1878-1365
author2_role author
dc.subject.none.fl_str_mv Landslides
Hydro-mechanical coupling
Coupled flow-deformation analysis
Numerical analysis
Drawdown
Landslide
Pore water pressure
Esllavissades
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
topic Landslides
Hydro-mechanical coupling
Coupled flow-deformation analysis
Numerical analysis
Drawdown
Landslide
Pore water pressure
Esllavissades
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
description In this study, rapid drawdown scenarios were analyzed by means of numerical examples as well as modeling of real cases with in situ measurements. The aim of the study was to evaluate different approaches available for calculating pore water pressure distributions during and after a drawdown. To do that, a single slope subjected to a drawdown was first analyzed under different calculation alternatives, and numerical results were discussed. Simple methods, such as undrained analysis and pure flow analysis, implicitly assuming a rigid soil skeleton, lead to significant errors in pore water pressure distributions when compared with coupled flow-deformation analysis. A similar analysis was performed for the upstream slope of the Glen Shira Dam, Scotland, and numerical results were compared with field measurements during a controlled drawdown. Field records indicate that classical undrained calculations are conservative but unrealistic. Then, a recent case of a major landslide triggered by a rapid drawdown in a reservoir was interpreted. A key aspect of the case was the correct characterization of permeability of a representative soil profile. This was achieved by combining laboratory test results and a back analysis of pore water pressure time records during a period of reservoir water level fluctuations. The results highlight the difficulty of predicting whether the pore water pressure is overestimated or underestimated when using simplified approaches, and it is concluded that predicting the pore water pressure distribution in a slope after a rapid drawdown requires a coupled flow-deformation analysis in saturated and unsaturated porous media.
publishDate 2016
dc.date.none.fl_str_mv 2016
2016-07-01
2017
2017-02-27
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/101652
https://dx.doi.org/10.1016/j.wse.2016.11.003
url https://hdl.handle.net/2117/101652
https://dx.doi.org/10.1016/j.wse.2016.11.003
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

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

http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
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 15,300719

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