Determinação da condutividade hidráulica não saturada de solos residuais com o permeâmetro Guelph e ensaios de laboratório

• Ano de defesa: 2006
• Autor(a) principal: Lisboa, Rafael Luis Lobato
• Orientador(a): Azevedo, Roberto Francisco de
• Banca de defesa: Azevedo, Izabel Christina D' Almeida Duarte de , Reis, Rodrigo Martins , Minette, Enivaldo , Tibana, Sérgio
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Engenharia Civil
• Departamento: Geotecnia; Saneamento ambiental
• País: BR
• Palavras-chave em Português: Solos não-saturados; Condutividade hidráulica; Ensaio de campo
• Palavras-chave em Inglês: No saturated soils; Hydraulic conductivity; Field tests
• Área do conhecimento CNPq: CNPQ::ENGENHARIAS::ENGENHARIA CIVIL::GEOTECNICA
• Link de acesso: http://locus.ufv.br/handle/123456789/3852

Hydraulic conductivities of three non-saturated soils of the Viçosa region were studied with field tests, using the Guelph permeameter, and laboratory tests. In the field, the tests were performed with one and two hydraulic head heights. The corresponding results were analyzed with theoretical models proposed by REYNOLDS and ELRICK (1985). In the laboratory, water retention curves and saturated hydraulic conductivities of the soils were determined, with which variation of the hydraulic conductivities with suction were obtained using VAN GENUCHTEN (1980) and GARDNER (1958) empirical formulations. Finally, the non-saturated hydraulic conductivities obtained with the Guelph permeameter and the ones determined in the laboratory were compared. With the exception of soil 03, in which the walls of the hole made to execute the field test smeared, the saturated hydraulic conductivities values obtained in the field and in the laboratory were similar. With respect to the hydraulic conductivities variation with suction, it was verified that field and laboratory results agreed better when GARDNER (1958) model was used to represent the water retention curves than when the VAN GENUCHTEN (1980) model was used.