The use of slot filter in piezocone tests for site characterization of tropical soils

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dc.contributor.authorMondelli, G.
dc.contributor.authorDe Mio, G.
dc.contributor.authorGiacheti, H. L. [UNESP]
dc.contributor.authorHowie, J. A.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionGolder Associates Brazil
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversity of British Columbia
dc.date.accessioned2014-05-27T11:24:05Z
dc.date.available2014-05-27T11:24:05Z
dc.date.issued2009-12-01
dc.description.abstractThe use of piezocone tests with a slot filter filled with automotive grease for site characterization of tropical soils is assessed. Laboratory tests using the slot filter filled with automotive grease as well as the conventional porous piezo-element saturated with glycerin were carried out to evaluate the pore pressure (u 2) transducer response. CPTu tests using piezo-elements saturated with glycerin and the slot filter filled with grease were pushed side by side in different research sites in Brazil. Estimates of mechanical and hydraulic soil parameters were made based on pore pressure dissipation curves from using both techniques. Laboratory test results indicate that the pore pressure response using the slot filter with grease was delayed when compared to the piezo-element saturated with glycerin, since grease has a higher viscosity. For tropical soils, the records of u2 in piezocone tests using slot filter with grease presented larger peaks than with porous element saturated with glycerin. Records of u2 using the slot filter above the groundwater table suggest the increase of the degree of saturation in unsaturated zone, where porous filter can be desaturated by suction. The slot filter can be used to help the interpretation of the soil profile with deep groundwater level as well as to help detecting its position for some studied soils. The results shown high repeatability for all study sites. This technique is much easier to handle, especially for tropical soils, where the groundwater table is usually deep and pre-drilling is expensive and time consuming. © 2009 IOS Press.en
dc.description.affiliationUniversity of São Paulo, São Carlos-SP
dc.description.affiliationGolder Associates Brazil, São Paulo-SP
dc.description.affiliationSão Paulo State University, Bauru-SP
dc.description.affiliationUniversity of British Columbia, Vancouver-BC
dc.description.affiliationUnespSão Paulo State University, Bauru-SP
dc.format.extent973-976
dc.identifierhttp://dx.doi.org/10.3233/978-1-60750-031-5-973
dc.identifier.citationProceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering: The Academia and Practice of Geotechnical Engineering, v. 2, p. 973-976.
dc.identifier.doi10.3233/978-1-60750-031-5-973
dc.identifier.lattes0781618586438933
dc.identifier.scopus2-s2.0-77953426737
dc.identifier.urihttp://hdl.handle.net/11449/71349
dc.language.isoeng
dc.relation.ispartofProceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering: The Academia and Practice of Geotechnical Engineering
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectPiezocone
dc.subjectPore pressure
dc.subjectSaturation
dc.subjectSite characterization
dc.subjectTropical soils
dc.subjectDeep groundwaters
dc.subjectDegree of saturations
dc.subjectGround water table
dc.subjectLaboratory test
dc.subjectPiezo elements
dc.subjectPiezocone test
dc.subjectPore pressure dissipation
dc.subjectPorous elements
dc.subjectPorous filters
dc.subjectPressure response
dc.subjectSlot filters
dc.subjectSoil parameters
dc.subjectSoil profiles
dc.subjectStudy sites
dc.subjectUnsaturated zone
dc.subjectCharacterization
dc.subjectGeotechnical engineering
dc.subjectGlycerol
dc.subjectGroundwater
dc.subjectSaturation (materials composition)
dc.subjectSoil mechanics
dc.subjectTropics
dc.subjectSoils
dc.titleThe use of slot filter in piezocone tests for site characterization of tropical soilsen
dc.typeTrabalho apresentado em evento
unesp.author.lattes0781618586438933
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Baurupt

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Artigos - Engenharia Civil e Ambiental - FEB