Energy ratio (ER) for the standard penetration test based on measured field tests

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual de Maringá (UEM)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.creatorLukiantchuki, J. A.-
Autor(es): dc.creatorBernardes, G. P. [UNESP]-
Autor(es): dc.creatorEsquivel, E. R.-
Data de aceite: dc.date.accessioned2022-08-04T22:06:45Z-
Data de disponibilização: dc.date.available2022-08-04T22:06:45Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2017-08-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.28927/SR.402077-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/220954-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/220954-
Descrição: dc.descriptionThe Standard Penetration Test (SPT) is often used to estimate the soil parameters for geotechnical design projects, using the NSPT index. However, these estimates are performed based on empirical correlations without any scientific basis. Moreover, the test has a large inherent results dispersion due to the use of different types of equipment and execution procedures. Since the NSPT index depends on the amount of energy that is effectively transmitted to the sampler during the hammer fall, it is fundamental to be able to estimate this energy. Given the importance of estimating the energy that reaches the SPT sampler, an instrumented subassembly was developed in order to simultaneously assess the amount of energy transmitted to the drill rods, at sections just above the sampler and just below the anvil. This paper presents a series of SPT experimental results carried out in two different sites located in the State of São Paulo, using two different equipment set-ups (with manual and automatic tripping mechanisms), enabling the assessment of the top and bottom energy ratio under different conditions. Results show that for hand lifting hammer and automatic trip hammer systems the difference in the energy ratio is not significant. However, the dispersion of the results for the hand lifting hammer system is more pronounced due to execution procedures, equipment and operators.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionDepartamento de Engenharia Civil Universidade Estadual de Maringá-
Descrição: dc.descriptionDepartamento de Engenharia Civil Universidade Estadual Paulista-
Descrição: dc.descriptionDepartamento de Geotecnia Universidade de São Paulo-
Descrição: dc.descriptionDepartamento de Engenharia Civil Universidade Estadual Paulista-
Descrição: dc.descriptionFAPESP: 2008/08268-4-
Descrição: dc.descriptionCNPq: 479001/2009-0-
Formato: dc.format77-91-
Idioma: dc.languageen-
Relação: dc.relationSoils and Rocks-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectDynamic instrumentation-
Palavras-chave: dc.subjectEnergy-
Palavras-chave: dc.subjectEnergy ratio-
Palavras-chave: dc.subjectFoundations-
Palavras-chave: dc.subjectPenetration test-
Palavras-chave: dc.subjectSPT test-
Título: dc.titleEnergy ratio (ER) for the standard penetration test based on measured field tests-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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