Efficiency in Standard Penetration Test
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/220609 |
Resumo: | The Standard Penetration Test (SPT) is widely used for geotechnical subsurface investigation. It provides assessment of soil properties and foundation design parameters. The Nspt index depends not only on the soil properties and the SPT setup characteristics, but also on the energy delivered to the string of rods and to the SPT sampler during the hammer impact. This paper presents the results of SPT tests performed with two instrumented subassemblies, one placed at the top and the other one at the bottom of the string of rods. This instrumentation allowed the assessment of the amount of energy transmitted to the string of rods, at sections just below the anvil and just above the sampler. Results show that the developed instrumentation is suitable to predict the amount of energy, at different sections, during the sampler penetration into to the soil. Despite the variability of the SPT setups and soil site conditions, experimental results show that SPT top and bottom efficiency values do not vary with the short and medium rod length. The SPT efficiency at a section just below the anvil was around 72% and 74% for the Bauru and Sao Carlos sites, respectively. The SPT efficiency at a section just above the sampler was around 56% and 58% for the Bauru and Sao Carlos sites, respectively. |
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Efficiency in Standard Penetration TestThe Standard Penetration Test (SPT) is widely used for geotechnical subsurface investigation. It provides assessment of soil properties and foundation design parameters. The Nspt index depends not only on the soil properties and the SPT setup characteristics, but also on the energy delivered to the string of rods and to the SPT sampler during the hammer impact. This paper presents the results of SPT tests performed with two instrumented subassemblies, one placed at the top and the other one at the bottom of the string of rods. This instrumentation allowed the assessment of the amount of energy transmitted to the string of rods, at sections just below the anvil and just above the sampler. Results show that the developed instrumentation is suitable to predict the amount of energy, at different sections, during the sampler penetration into to the soil. Despite the variability of the SPT setups and soil site conditions, experimental results show that SPT top and bottom efficiency values do not vary with the short and medium rod length. The SPT efficiency at a section just below the anvil was around 72% and 74% for the Bauru and Sao Carlos sites, respectively. The SPT efficiency at a section just above the sampler was around 56% and 58% for the Bauru and Sao Carlos sites, respectively.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)State University of MoringaState University of Sao PauloUniversity of Sao PauloFAPESP: 2008/08268-4State University of MoringaUniversidade de São Paulo (USP)Lukiantchuki, J. A.Bernardes, G. P.Esquivel, E. R.2022-04-28T19:03:31Z2022-04-28T19:03:31Z2015-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject2981-2985Geotechnical Engineering for Infrastructure and Development - Proceedings of the XVI European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2015, v. 6, p. 2981-2985.http://hdl.handle.net/11449/2206092-s2.0-84964526632Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengGeotechnical Engineering for Infrastructure and Development - Proceedings of the XVI European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2015info:eu-repo/semantics/openAccess2022-04-28T19:03:31Zoai:repositorio.unesp.br:11449/220609Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:36:22.592572Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Efficiency in Standard Penetration Test |
title |
Efficiency in Standard Penetration Test |
spellingShingle |
Efficiency in Standard Penetration Test Lukiantchuki, J. A. |
title_short |
Efficiency in Standard Penetration Test |
title_full |
Efficiency in Standard Penetration Test |
title_fullStr |
Efficiency in Standard Penetration Test |
title_full_unstemmed |
Efficiency in Standard Penetration Test |
title_sort |
Efficiency in Standard Penetration Test |
author |
Lukiantchuki, J. A. |
author_facet |
Lukiantchuki, J. A. Bernardes, G. P. Esquivel, E. R. |
author_role |
author |
author2 |
Bernardes, G. P. Esquivel, E. R. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
State University of Moringa Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Lukiantchuki, J. A. Bernardes, G. P. Esquivel, E. R. |
description |
The Standard Penetration Test (SPT) is widely used for geotechnical subsurface investigation. It provides assessment of soil properties and foundation design parameters. The Nspt index depends not only on the soil properties and the SPT setup characteristics, but also on the energy delivered to the string of rods and to the SPT sampler during the hammer impact. This paper presents the results of SPT tests performed with two instrumented subassemblies, one placed at the top and the other one at the bottom of the string of rods. This instrumentation allowed the assessment of the amount of energy transmitted to the string of rods, at sections just below the anvil and just above the sampler. Results show that the developed instrumentation is suitable to predict the amount of energy, at different sections, during the sampler penetration into to the soil. Despite the variability of the SPT setups and soil site conditions, experimental results show that SPT top and bottom efficiency values do not vary with the short and medium rod length. The SPT efficiency at a section just below the anvil was around 72% and 74% for the Bauru and Sao Carlos sites, respectively. The SPT efficiency at a section just above the sampler was around 56% and 58% for the Bauru and Sao Carlos sites, respectively. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-01-01 2022-04-28T19:03:31Z 2022-04-28T19:03:31Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Geotechnical Engineering for Infrastructure and Development - Proceedings of the XVI European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2015, v. 6, p. 2981-2985. http://hdl.handle.net/11449/220609 2-s2.0-84964526632 |
identifier_str_mv |
Geotechnical Engineering for Infrastructure and Development - Proceedings of the XVI European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2015, v. 6, p. 2981-2985. 2-s2.0-84964526632 |
url |
http://hdl.handle.net/11449/220609 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Geotechnical Engineering for Infrastructure and Development - Proceedings of the XVI European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2015 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
2981-2985 |
dc.source.none.fl_str_mv |
Scopus 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_ |
1808128386703294464 |