Determination of soil properties from standard penetration test complemented by torque measurement (SPT-T)
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/18759 http://hdl.handle.net/11449/130188 |
Resumo: | The major problem on geotechnical work is to ensure that no settlements occur during the life cycle of the construction. This involves proper design of foundations and their bearing capacity. The Brazilian standard for design and execution of foundations, ABNT (2010) NBR 6122 imposes the utilization of field tests when designing building foundations. The Standard Penetration Test, SPT, ABNT (2001) NBR 6484, is still the most common in-situ test for those purposes. Ranzini (1988) suggested supplementing the conventional SPT with the measurement of the torque (SPT-T) required to turn the split spoon after driving, in order to provide a 'static' component to a 'dynamic'. The adhesion between the soil and the sampler, obtained by the torque measurement, could be used to calculate the lateral skin friction of piles. This paper describes the SPT-T procedure including both a supplementary equipment and practical aspects. Also it presents an accurate torque measurement, a prediction method to calculate the bearing capacity of piles used in building foundations using the SPT-T test and a comparison between the estimated bearing capacities of building foundations with instrumented load tests in order to validate the method. |
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Determination of soil properties from standard penetration test complemented by torque measurement (SPT-T)Determinação das propriedades do solo através do ensaio SPT-TSoil characterizationFoundation designSPTTorque measurementLoad testsCaracterização de soloProjeto de fundaçõesSPTMedida de torqueProvas de cargaThe major problem on geotechnical work is to ensure that no settlements occur during the life cycle of the construction. This involves proper design of foundations and their bearing capacity. The Brazilian standard for design and execution of foundations, ABNT (2010) NBR 6122 imposes the utilization of field tests when designing building foundations. The Standard Penetration Test, SPT, ABNT (2001) NBR 6484, is still the most common in-situ test for those purposes. Ranzini (1988) suggested supplementing the conventional SPT with the measurement of the torque (SPT-T) required to turn the split spoon after driving, in order to provide a 'static' component to a 'dynamic'. The adhesion between the soil and the sampler, obtained by the torque measurement, could be used to calculate the lateral skin friction of piles. This paper describes the SPT-T procedure including both a supplementary equipment and practical aspects. Also it presents an accurate torque measurement, a prediction method to calculate the bearing capacity of piles used in building foundations using the SPT-T test and a comparison between the estimated bearing capacities of building foundations with instrumented load tests in order to validate the method.O maior problema relativo à construção de obras geotécnicas é a garantia da não ocorrência de recalques excessivos na vida útil da construção, que envolve o projeto de fundações, o qual depende do conhecimento das propriedades do subsolo . A norma brasileira de projeto e execução de fundações, ABNT (2010) NBR 6122 estabelece que qualquer obra deva ter investigação geotécnica preliminar, no mínimo SPT. Esse é o ensaio mais frequentemente utilizado para caracterização do solo para fins de projeto de fundações e trabalhos geotécnicos. Procurando obter mais informações durante o ensaio, Ranzini (1988) sugeriu adicionar ao ensaio SPT convencional a medida do torque (SPT-T) necessária para rotacionar o amostrador logo após sua cravação. A adesão entre o solo e o amostrador, obtida através do torque, pode ser relacionada com a resistência lateral de estacas. Esse artigo visa descrever o procedimento da medida do torque e apresentar uma nova proposta para prever a capacidade de carga de estacas. As estimativas calculadas foram comparadas aos resultados de provas-de-carga instrumentadas, validando o método.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Universidade Estadual Paulista (UNESP), Programa de Pós-Graduação em Engenharia Civil e Ambiental, Bauru BR-17033360, SP, BrasilUniversidade Estadual de Campinas (UNICAMP), Faculdade de Engenharia Agrícola, Programa de Pós-Graduação em Engenharia Agrícola, Campinas, SP, BrasilUniversidade Estadual Paulista (UNESP), Programa de Pós-Graduação em Engenharia Civil e Ambiental, Bauru BR-17033360, SP, BrasilUniversidade Estadual de Maringá (UEM), Pró-Reitoria de Pesquisa e Pós-GraduaçãoUniversidade Estadual Paulista (Unesp)Universidade Estadual de Campinas (UNICAMP)Peixoto, Anna Silvia Palcheco [UNESP]Carvalho, David de2015-11-03T15:30:03Z2015-11-03T15:30:03Z2014-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article617-621application/pdfhttp://periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/18759Acta Scientiarum-technology. Maringá: Universidade Estadual de Maringá (UEM), Pró-Reitoria de Pesquisa e Pós-Graduação, v. 36, n. 4, p. 617-621, 2014.1806-2563http://hdl.handle.net/11449/13018810.4025/actascitechnol.v36i4.18759WOS:000347331800005WOS000347331800005.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengActa Scientiarum-technology0.2310,168info:eu-repo/semantics/openAccess2024-06-28T12:56:42Zoai:repositorio.unesp.br:11449/130188Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-06-28T12:56:42Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Determination of soil properties from standard penetration test complemented by torque measurement (SPT-T) Determinação das propriedades do solo através do ensaio SPT-T |
title |
Determination of soil properties from standard penetration test complemented by torque measurement (SPT-T) |
spellingShingle |
Determination of soil properties from standard penetration test complemented by torque measurement (SPT-T) Peixoto, Anna Silvia Palcheco [UNESP] Soil characterization Foundation design SPT Torque measurement Load tests Caracterização de solo Projeto de fundações SPT Medida de torque Provas de carga |
title_short |
Determination of soil properties from standard penetration test complemented by torque measurement (SPT-T) |
title_full |
Determination of soil properties from standard penetration test complemented by torque measurement (SPT-T) |
title_fullStr |
Determination of soil properties from standard penetration test complemented by torque measurement (SPT-T) |
title_full_unstemmed |
Determination of soil properties from standard penetration test complemented by torque measurement (SPT-T) |
title_sort |
Determination of soil properties from standard penetration test complemented by torque measurement (SPT-T) |
author |
Peixoto, Anna Silvia Palcheco [UNESP] |
author_facet |
Peixoto, Anna Silvia Palcheco [UNESP] Carvalho, David de |
author_role |
author |
author2 |
Carvalho, David de |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Estadual de Campinas (UNICAMP) |
dc.contributor.author.fl_str_mv |
Peixoto, Anna Silvia Palcheco [UNESP] Carvalho, David de |
dc.subject.por.fl_str_mv |
Soil characterization Foundation design SPT Torque measurement Load tests Caracterização de solo Projeto de fundações SPT Medida de torque Provas de carga |
topic |
Soil characterization Foundation design SPT Torque measurement Load tests Caracterização de solo Projeto de fundações SPT Medida de torque Provas de carga |
description |
The major problem on geotechnical work is to ensure that no settlements occur during the life cycle of the construction. This involves proper design of foundations and their bearing capacity. The Brazilian standard for design and execution of foundations, ABNT (2010) NBR 6122 imposes the utilization of field tests when designing building foundations. The Standard Penetration Test, SPT, ABNT (2001) NBR 6484, is still the most common in-situ test for those purposes. Ranzini (1988) suggested supplementing the conventional SPT with the measurement of the torque (SPT-T) required to turn the split spoon after driving, in order to provide a 'static' component to a 'dynamic'. The adhesion between the soil and the sampler, obtained by the torque measurement, could be used to calculate the lateral skin friction of piles. This paper describes the SPT-T procedure including both a supplementary equipment and practical aspects. Also it presents an accurate torque measurement, a prediction method to calculate the bearing capacity of piles used in building foundations using the SPT-T test and a comparison between the estimated bearing capacities of building foundations with instrumented load tests in order to validate the method. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-01-01 2015-11-03T15:30:03Z 2015-11-03T15:30:03Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/18759 Acta Scientiarum-technology. Maringá: Universidade Estadual de Maringá (UEM), Pró-Reitoria de Pesquisa e Pós-Graduação, v. 36, n. 4, p. 617-621, 2014. 1806-2563 http://hdl.handle.net/11449/130188 10.4025/actascitechnol.v36i4.18759 WOS:000347331800005 WOS000347331800005.pdf |
url |
http://periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/18759 http://hdl.handle.net/11449/130188 |
identifier_str_mv |
Acta Scientiarum-technology. Maringá: Universidade Estadual de Maringá (UEM), Pró-Reitoria de Pesquisa e Pós-Graduação, v. 36, n. 4, p. 617-621, 2014. 1806-2563 10.4025/actascitechnol.v36i4.18759 WOS:000347331800005 WOS000347331800005.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Acta Scientiarum-technology 0.231 0,168 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
617-621 application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Estadual de Maringá (UEM), Pró-Reitoria de Pesquisa e Pós-Graduação |
publisher.none.fl_str_mv |
Universidade Estadual de Maringá (UEM), Pró-Reitoria de Pesquisa e Pós-Graduação |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1803650039882448896 |