Assessment of settlement prediction by theoretical and semi-empirical methods in a granular soil profile in the Brazilian Northeast

Avaliação da previsão de recalques por métodos teóricos e semi-empíricos em perfil de solo granular do Nordeste Brasileiro

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Palavras-chave:

Load test, Settlement, Estimation

Resumo

The direct study investigates settlements from a circular load test with a diameter of 50 cm, conducted at the Experimental Field of Geotechnics and Foundations of the Federal University of Ceará. The study utilizes data from laboratory and field tests to determine parameters, employing both the classical methodology of Elasticity Theory and semi-empirical methods such as those by Décourt (1992), Schmertmann (1978), Barata (1984), Burland & Burbidge (1985), Meyerhof (1965), and Sandroni (1991). Laboratory tests included physical characterization, direct shear tests, triaxial tests, and Standard Penetration Tests (SPT). The direct load test conducted according to NBR 6489/19 standard served as a reference for comparing calculation methods. Comparative analysis using the least squares method indicates that the methods of Schmertmann (1978) and Sandroni (1991) yielded results closer to the direct load test, whereas the methods of Burland & Burbidge (1985), Barata (1984), and Meyerhof (1965) showed greater variation.

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Referências

ASSOCIAÇÃO BRASILEIRA DE NORMAS TÉCNICAS (ABNT). NBR 6489: Solo – Prova de carga estática em fundação direta. Rio de janeiro. 2019.

BARATA, F. E. Propriedades mecânicas dos solos - uma introdução ao projeto de fundações. Rio de Janeiro. Livros Técnicos e Científicos Editora Ltda., 1984.

BUNGENSTAB, FELIPE & BICALHO, KÁTIA & R., CASTELLO. (2010). Estimativa de recalques em fundações superficiais apoiadas em solos arenosos.

BURLAND, J. B.; BIJRBIDGE, M. C. Settlements of foundations on sand and gravel. In: institution of civil engineers, 1985, London. Proceeedings... London: Institution of Civil Engineers, 1985.

DÉCOURT, L., SPT in non-classical material, Applicability of Classical Soil Mechanics Principles in Structured Soils. Proc. US/Brazil Geotechnical Workshop, Belo Horizonte, pp.67-100, 1992.

HARR, M. E. Foundations of theoretical soil mechanics. New York: MacGraw-Hill Book Co., 1966.

MOURA, A. S.; RAMOS, M. R.; CERQUEIRA JÚNIOR, E.; BEZERRA DE MENEZES, P. H. L.; LIMA FILHO, F. P. (2018). Caracterização preliminar geotécnica do subsolo do Campo Experimental de Geotecnia e de Fundações da Universidade Federal do Ceará (CEGEF – UFC). In: XIX Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica. Salvador.

ÑSAT 2015 - VIII Simpósio Brasileiro De Solos Não Saturados, Fortaleza, Ceará.

SANDRONI, S. S. Young metamorphic residual soils. In: Panamerican CSMFE, 9., Viña del Mar, 1991. Proceedings...PCSMFE, 1991.

SCHMERTMANN, J. H. HARTMAN, J. P.; BROWN, P.R. “Improved strain influence factor diagrams”, Journal of Geotechnical Engng. Div., ASCE, 104(GT8), p. 1131-1135,1978.

TAN, C.K., DUNCAN, J.M. (1991). Settlement of footings on sands – Accuracy and Reliability. Geotechnical Engineering Congress, v.1, pg. 446-455.

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Publicado

2024-08-14

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Articles