Assessing preferential seepage and monitoring mortar injection through an earthen dam settled over a gypsiferous substrate using combined geophysical methods

For several decades the Sant Llorenç de Montgai reservoir has experienced different problems that could affect the safety of the engineering structure. For this reason, several corrective actions have been taken over the years. Here, we present a study involving complementary geophysical methods inc...

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Autores: Himi, Mahjoub, Casado, Ismael, Sendrós Brea-Iglesias, Alex, Lovera Carrasco, Raúl, Rivero Marginedas, Lluís, Casas Bou, Albert
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2018
País:España
Recursos:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/222119
Acesso em linha:https://hdl.handle.net/2445/222119
Access Level:acceso abierto
Palavra-chave:Geofísica
Tomografia sísmica
Geophysics
Seismic tomography
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spelling Assessing preferential seepage and monitoring mortar injection through an earthen dam settled over a gypsiferous substrate using combined geophysical methodsHimi, MahjoubCasado, IsmaelSendrós Brea-Iglesias, AlexLovera Carrasco, RaúlRivero Marginedas, LluísCasas Bou, AlbertGeofísicaTomografia sísmicaGeophysicsSeismic tomographyFor several decades the Sant Llorenç de Montgai reservoir has experienced different problems that could affect the safety of the engineering structure. For this reason, several corrective actions have been taken over the years. Here, we present a study involving complementary geophysical methods including electrical resistivity tomography, seismic refraction tomography and frequency-domain electromagnetic surveys. The analysis of the inverted electrical resistivity tomography cross-sections combined with the seismic refraction results and land subsidence monitoring data show the likely mechanism of abnormal seepage. The areas where mortar injections were applied as a corrective measure are also clearly delineated. In addition, the evolution of the state of the embankment has been established from two successive electrical resistivity tomography surveys in the last two decades. The results show areas where corrective mortar injections have been effective, while in other areas new abnormal seepage has been detected. The lithological heterogeneity of the bedrock, especially the dissolution of gypsum-rich rocks, induced subsidence effects and caused abnormal seepage in different areas along the embankment. Our results indicate how corrective solutions can be optimized to reduce the cost of corrective engineering interventions.Elsevier B.V.2018info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2445/222119Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésVersió postprint del document publicat a: https://doi.org/10.1016/j.enggeo.2018.10.002Engineering Geology, 2018, vol. 246, p. 212-221https://doi.org/10.1016/j.enggeo.2018.10.002(c) Elsevier B.V., 2018info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/2221192026-05-27T06:46:51Z
dc.title.none.fl_str_mv Assessing preferential seepage and monitoring mortar injection through an earthen dam settled over a gypsiferous substrate using combined geophysical methods
title Assessing preferential seepage and monitoring mortar injection through an earthen dam settled over a gypsiferous substrate using combined geophysical methods
spellingShingle Assessing preferential seepage and monitoring mortar injection through an earthen dam settled over a gypsiferous substrate using combined geophysical methods
Himi, Mahjoub
Geofísica
Tomografia sísmica
Geophysics
Seismic tomography
title_short Assessing preferential seepage and monitoring mortar injection through an earthen dam settled over a gypsiferous substrate using combined geophysical methods
title_full Assessing preferential seepage and monitoring mortar injection through an earthen dam settled over a gypsiferous substrate using combined geophysical methods
title_fullStr Assessing preferential seepage and monitoring mortar injection through an earthen dam settled over a gypsiferous substrate using combined geophysical methods
title_full_unstemmed Assessing preferential seepage and monitoring mortar injection through an earthen dam settled over a gypsiferous substrate using combined geophysical methods
title_sort Assessing preferential seepage and monitoring mortar injection through an earthen dam settled over a gypsiferous substrate using combined geophysical methods
dc.creator.none.fl_str_mv Himi, Mahjoub
Casado, Ismael
Sendrós Brea-Iglesias, Alex
Lovera Carrasco, Raúl
Rivero Marginedas, Lluís
Casas Bou, Albert
author Himi, Mahjoub
author_facet Himi, Mahjoub
Casado, Ismael
Sendrós Brea-Iglesias, Alex
Lovera Carrasco, Raúl
Rivero Marginedas, Lluís
Casas Bou, Albert
author_role author
author2 Casado, Ismael
Sendrós Brea-Iglesias, Alex
Lovera Carrasco, Raúl
Rivero Marginedas, Lluís
Casas Bou, Albert
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Geofísica
Tomografia sísmica
Geophysics
Seismic tomography
topic Geofísica
Tomografia sísmica
Geophysics
Seismic tomography
description For several decades the Sant Llorenç de Montgai reservoir has experienced different problems that could affect the safety of the engineering structure. For this reason, several corrective actions have been taken over the years. Here, we present a study involving complementary geophysical methods including electrical resistivity tomography, seismic refraction tomography and frequency-domain electromagnetic surveys. The analysis of the inverted electrical resistivity tomography cross-sections combined with the seismic refraction results and land subsidence monitoring data show the likely mechanism of abnormal seepage. The areas where mortar injections were applied as a corrective measure are also clearly delineated. In addition, the evolution of the state of the embankment has been established from two successive electrical resistivity tomography surveys in the last two decades. The results show areas where corrective mortar injections have been effective, while in other areas new abnormal seepage has been detected. The lithological heterogeneity of the bedrock, especially the dissolution of gypsum-rich rocks, induced subsidence effects and caused abnormal seepage in different areas along the embankment. Our results indicate how corrective solutions can be optimized to reduce the cost of corrective engineering interventions.
publishDate 2018
dc.date.none.fl_str_mv 2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/222119
url https://hdl.handle.net/2445/222119
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1016/j.enggeo.2018.10.002
Engineering Geology, 2018, vol. 246, p. 212-221
https://doi.org/10.1016/j.enggeo.2018.10.002
dc.rights.none.fl_str_mv (c) Elsevier B.V., 2018
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Elsevier B.V., 2018
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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