Model tests and numerical modeling on post-grouting effects of steel pipe micropiles

Autores
Useche Infante, Danny; Aiassa Martínez, Gonzalo Martín; Arrúa, Pedro Ariel
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Steel pipe micropiles have been used successfully for deep foundations. To improve the performance of steel pipe micropiles, the post-grouting technology is employed worldwide due to its potential to increase the axial resistance and decrease the displacements in the micropile. This foundation is called grouted steel pipe micropile in the literature. The post grouting is commonly carried out at the micropile sides using grout delivery pipes. In this contribution, the results of scale model tests and numerical simulations with grouted steel pipe micropiles are presented. Model micropiles were tested within a calibration chamber containing silty soil prepared with a unit weight of 14 kN/m3. The stress level remained constant in the sample with the application of an overload (100 kPa) on the soil surface. Based on the results of numerical simulations, the scale effect on the axial resistance of pipe micropiles is considered. Furthermore, the influence of grout injection pressure on the pipe micropile behavior is studied. The analysis reveals that, for steel pipe micropiles in compression, due to increasing of grout injection pressure from 26.7 to 30.0 kPa, the ultimate axial resistance was improved by 19.0 and 33.7% compared to the micropile with an injection pressure of 25.0 kPa. Two main factors that improve the behavior of the micropile were identified, the first is the soil densification under the micropile tip originating from the micropile driving; and the second factor is the improvement of the micropile friction resistance due to the grout penetration into the surrounding soil caused by the grouting. Finally, a multiple regression equation to estimate the ultimate axial resistance of grouted steel pipe micropile is presented.
Fil: Useche Infante, Danny. Universidad Tecnológica Nacional. Regional Córdoba. Grupo de Investigación y Desarrollo en Geotecnia. Despartamento Civil. Córdoba; Argentina.
Fil: Aiassa Martínez, Gonzalo Martín. Universidad Tecnológica Nacional. Regional Córdoba. Grupo de Investigación y Desarrollo en Geotecnia. Despartamento Civil. Córdoba; Argentina.
Fil: Arrúa, Pedro Ariel. Universidad Tecnológica Nacional. Regional Córdoba. Grupo de Investigación y Desarrollo en Geotecnia. Despartamento Civil. Córdoba; Argentina.
Peer Reviewed
Materia
steel pipe micropiles
deep foundations
numerical simulations
Nivel de accesibilidad
acceso abierto
Condiciones de uso
2024-09-04T22:50:05Z
Repositorio
Repositorio Institucional Abierto (UTN)
Institución
Universidad Tecnológica Nacional
OAI Identificador
oai:ria.utn.edu.ar:20.500.12272/11410
Acceder
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network_acronym_str RIAUTN
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network_name_str Repositorio Institucional Abierto (UTN)
spelling Model tests and numerical modeling on post-grouting effects of steel pipe micropilesUseche Infante, DannyAiassa Martínez, Gonzalo MartínArrúa, Pedro Arielsteel pipe micropilesdeep foundationsnumerical simulationsSteel pipe micropiles have been used successfully for deep foundations. To improve the performance of steel pipe micropiles, the post-grouting technology is employed worldwide due to its potential to increase the axial resistance and decrease the displacements in the micropile. This foundation is called grouted steel pipe micropile in the literature. The post grouting is commonly carried out at the micropile sides using grout delivery pipes. In this contribution, the results of scale model tests and numerical simulations with grouted steel pipe micropiles are presented. Model micropiles were tested within a calibration chamber containing silty soil prepared with a unit weight of 14 kN/m3. The stress level remained constant in the sample with the application of an overload (100 kPa) on the soil surface. Based on the results of numerical simulations, the scale effect on the axial resistance of pipe micropiles is considered. Furthermore, the influence of grout injection pressure on the pipe micropile behavior is studied. The analysis reveals that, for steel pipe micropiles in compression, due to increasing of grout injection pressure from 26.7 to 30.0 kPa, the ultimate axial resistance was improved by 19.0 and 33.7% compared to the micropile with an injection pressure of 25.0 kPa. Two main factors that improve the behavior of the micropile were identified, the first is the soil densification under the micropile tip originating from the micropile driving; and the second factor is the improvement of the micropile friction resistance due to the grout penetration into the surrounding soil caused by the grouting. Finally, a multiple regression equation to estimate the ultimate axial resistance of grouted steel pipe micropile is presented.Fil: Useche Infante, Danny. Universidad Tecnológica Nacional. Regional Córdoba. Grupo de Investigación y Desarrollo en Geotecnia. Despartamento Civil. Córdoba; Argentina.Fil: Aiassa Martínez, Gonzalo Martín. Universidad Tecnológica Nacional. Regional Córdoba. Grupo de Investigación y Desarrollo en Geotecnia. Despartamento Civil. Córdoba; Argentina.Fil: Arrúa, Pedro Ariel. Universidad Tecnológica Nacional. Regional Córdoba. Grupo de Investigación y Desarrollo en Geotecnia. Despartamento Civil. Córdoba; Argentina.Peer Reviewed2024-09-04T22:50:05Z2024-09-04T22:50:05Z2024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articulopdfapplication/pdfhttp://hdl.handle.net/20.500.12272/11410https://doi.org/10.1007/s40098-024-00986-7enginfo:eu-repo/semantics/openAccess2024-09-04T22:50:05Zhttp://creativecommons.org/licenses/by-nc-nd/4.0/Attribution-NonCommercial-NoDerivatives 4.0 InternacionalAiassa Martinez, Gonzalo MartínCC BY-NC-ND (Autoría-No comercial-No derivadas)reponame:Repositorio Institucional Abierto (UTN)instname:Universidad Tecnológica Nacional2026-09-24T12:44:54Zoai:ria.utn.edu.ar:20.500.12272/11410instacron:UTNInstitucionalhttp://ria.utn.edu.ar/Universidad públicaNo correspondehttp://ria.utn.edu.ar/oaigestionria@rec.utn.edu.ar; fsuarez@rec.utn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:a2026-09-24 12:44:55.411Repositorio Institucional Abierto (UTN) - Universidad Tecnológica Nacionalfalse
dc.title.none.fl_str_mv Model tests and numerical modeling on post-grouting effects of steel pipe micropiles
title Model tests and numerical modeling on post-grouting effects of steel pipe micropiles
spellingShingle Model tests and numerical modeling on post-grouting effects of steel pipe micropiles
Useche Infante, Danny
steel pipe micropiles
deep foundations
numerical simulations
title_short Model tests and numerical modeling on post-grouting effects of steel pipe micropiles
title_full Model tests and numerical modeling on post-grouting effects of steel pipe micropiles
title_fullStr Model tests and numerical modeling on post-grouting effects of steel pipe micropiles
title_full_unstemmed Model tests and numerical modeling on post-grouting effects of steel pipe micropiles
title_sort Model tests and numerical modeling on post-grouting effects of steel pipe micropiles
dc.creator.none.fl_str_mv Useche Infante, Danny
Aiassa Martínez, Gonzalo Martín
Arrúa, Pedro Ariel
author Useche Infante, Danny
author_facet Useche Infante, Danny
Aiassa Martínez, Gonzalo Martín
Arrúa, Pedro Ariel
author_role author
author2 Aiassa Martínez, Gonzalo Martín
Arrúa, Pedro Ariel
author2_role author
author
dc.subject.none.fl_str_mv steel pipe micropiles
deep foundations
numerical simulations
topic steel pipe micropiles
deep foundations
numerical simulations
dc.description.none.fl_txt_mv Steel pipe micropiles have been used successfully for deep foundations. To improve the performance of steel pipe micropiles, the post-grouting technology is employed worldwide due to its potential to increase the axial resistance and decrease the displacements in the micropile. This foundation is called grouted steel pipe micropile in the literature. The post grouting is commonly carried out at the micropile sides using grout delivery pipes. In this contribution, the results of scale model tests and numerical simulations with grouted steel pipe micropiles are presented. Model micropiles were tested within a calibration chamber containing silty soil prepared with a unit weight of 14 kN/m3. The stress level remained constant in the sample with the application of an overload (100 kPa) on the soil surface. Based on the results of numerical simulations, the scale effect on the axial resistance of pipe micropiles is considered. Furthermore, the influence of grout injection pressure on the pipe micropile behavior is studied. The analysis reveals that, for steel pipe micropiles in compression, due to increasing of grout injection pressure from 26.7 to 30.0 kPa, the ultimate axial resistance was improved by 19.0 and 33.7% compared to the micropile with an injection pressure of 25.0 kPa. Two main factors that improve the behavior of the micropile were identified, the first is the soil densification under the micropile tip originating from the micropile driving; and the second factor is the improvement of the micropile friction resistance due to the grout penetration into the surrounding soil caused by the grouting. Finally, a multiple regression equation to estimate the ultimate axial resistance of grouted steel pipe micropile is presented.
Fil: Useche Infante, Danny. Universidad Tecnológica Nacional. Regional Córdoba. Grupo de Investigación y Desarrollo en Geotecnia. Despartamento Civil. Córdoba; Argentina.
Fil: Aiassa Martínez, Gonzalo Martín. Universidad Tecnológica Nacional. Regional Córdoba. Grupo de Investigación y Desarrollo en Geotecnia. Despartamento Civil. Córdoba; Argentina.
Fil: Arrúa, Pedro Ariel. Universidad Tecnológica Nacional. Regional Córdoba. Grupo de Investigación y Desarrollo en Geotecnia. Despartamento Civil. Córdoba; Argentina.
Peer Reviewed
description Steel pipe micropiles have been used successfully for deep foundations. To improve the performance of steel pipe micropiles, the post-grouting technology is employed worldwide due to its potential to increase the axial resistance and decrease the displacements in the micropile. This foundation is called grouted steel pipe micropile in the literature. The post grouting is commonly carried out at the micropile sides using grout delivery pipes. In this contribution, the results of scale model tests and numerical simulations with grouted steel pipe micropiles are presented. Model micropiles were tested within a calibration chamber containing silty soil prepared with a unit weight of 14 kN/m3. The stress level remained constant in the sample with the application of an overload (100 kPa) on the soil surface. Based on the results of numerical simulations, the scale effect on the axial resistance of pipe micropiles is considered. Furthermore, the influence of grout injection pressure on the pipe micropile behavior is studied. The analysis reveals that, for steel pipe micropiles in compression, due to increasing of grout injection pressure from 26.7 to 30.0 kPa, the ultimate axial resistance was improved by 19.0 and 33.7% compared to the micropile with an injection pressure of 25.0 kPa. Two main factors that improve the behavior of the micropile were identified, the first is the soil densification under the micropile tip originating from the micropile driving; and the second factor is the improvement of the micropile friction resistance due to the grout penetration into the surrounding soil caused by the grouting. Finally, a multiple regression equation to estimate the ultimate axial resistance of grouted steel pipe micropile is presented.
publishDate 2024
dc.date.none.fl_str_mv 2024-09-04T22:50:05Z
2024-09-04T22:50:05Z
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12272/11410
https://doi.org/10.1007/s40098-024-00986-7
url http://hdl.handle.net/20.500.12272/11410
https://doi.org/10.1007/s40098-024-00986-7
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
2024-09-04T22:50:05Z
http://creativecommons.org/licenses/by-nc-nd/4.0/
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Aiassa Martinez, Gonzalo Martín
CC BY-NC-ND (Autoría-No comercial-No derivadas)
eu_rights_str_mv openAccess
rights_invalid_str_mv 2024-09-04T22:50:05Z
http://creativecommons.org/licenses/by-nc-nd/4.0/
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Aiassa Martinez, Gonzalo Martín
CC BY-NC-ND (Autoría-No comercial-No derivadas)
dc.format.none.fl_str_mv pdf
application/pdf
dc.source.none.fl_str_mv reponame:Repositorio Institucional Abierto (UTN)
instname:Universidad Tecnológica Nacional
reponame_str Repositorio Institucional Abierto (UTN)
collection Repositorio Institucional Abierto (UTN)
instname_str Universidad Tecnológica Nacional
repository.name.fl_str_mv Repositorio Institucional Abierto (UTN) - Universidad Tecnológica Nacional
repository.mail.fl_str_mv gestionria@rec.utn.edu.ar; fsuarez@rec.utn.edu.ar
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score 13.265058

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