Aspects of Mechanical Behavior and Modeling of a Tropical Unsaturated Soil

Autor(es)

Beltrame Benatti, Julio ; Rodrigues, Roger ; Miguel, Miriam

• Tipo de documento: Artigo Científico
• Fonte: GEOTECHNICAL AND GEOLOGICAL ENGINEERING; v. 31, n. 5, p. 17-pg., 2013-10-01.

Resumo

The research studies the applicability of two elastoplastic models for the collapse prediction of the lateritic soil profile from Southeastern Brazil. These tropical soils have peculiar geotechnical behavior, due to their mineralogical composition and porous structure coming from intense process of formation. Two elastoplastic models were analyzed: the Barcelona Basic Model (BBM) and another one based on BBM, however developed for tropical soils. Oedometric tests with suction control were performed at three distinct depths of the soil profile. The BBM was not suitable for the upper layer of the soil profile, because BBM considers the compressible behavior of the soil in function of the reduction of the elastoplastic compressibility index with the increase of the matric suction. The model developed for tropical soils showed better suited to the compressible behavior of the soil profile, resulting in good prediction of the collapse potential, mainly by accepting increasing values of the elastoplastic compressibility index of the soil profile with the matric suction rise. (AU)

• Processo FAPESP: 08/00016-6 - Colapsibilidade com sucção controlada de um solo coluvionar e laterítico de campinas/sp
• Beneficiário: Miriam Gonçalves Miguel
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 08/02162-0 - Colapsibilidade com Sucção Controlada de um Solo Coluvionar e Laterítico de Campinas/SP
• Beneficiário: Julio César Beltrame Benatti
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 05/00164-7 - Determinacao de curvas caracteristicas de succao da camada superficial do solo de campinas.
• Beneficiário: Miriam Gonçalves Miguel
• Modalidade de apoio: Auxílio à Pesquisa - Regular