Evaluation of settlement of shallow foundations laid on unsaturated soils

• Autor(a) principal: Lopes, Elis Ferreira
• Data de Publicação: 2021
• Outros Autores: Moreira, Marcela Moreira da Rocha, Leme, Rosiel Ferreira, Silva Filho, Francisco Chagas da
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/67333
• topic: Shallow foundations; Unsaturated soils; Evaluation of settlement

The study presents an experimental and numerical study on an unsaturated, non-plastic and poorly graded sand, originated from Fortaleza-CE, Brazil. The numerical analyses used the Finite Element Method (FEM), were performed using the UNSTRUCT software to simulate the curve stress versus strain, considering the effect of suction on soil stiffness. Characterization and determination of the retention curve were performed through filter paper tests, which were used to determine the stress versus strain curve in a double-oedometer test. Suction was considered constant along the entire test. From the numerical analyses done with UNSTRUCT software presented satisfactory results, especially in the presence of suction profiles, that show the variation of suction along of the depth. It can be concluded that higher suction values (and soil stiffness) generate lower settlements.