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30 - AVALIAÇÃO DO DESEMPENHO DE FUNDAÇÃO RASA EM SOLOS DE BAIXA RESISTÊNCIA COM EMPREGO DE CAMADA DE AREIA COMPACTADA

Doi: 10.47094/COBRAMSEG2026.5/30

PALAVRAS CHAVE: Fundação rasa, camada de areia compactada, capacidade de suporte, recalque, elementos finitos.

KEYWORDS: Shallow foundation; compacted sand layer; bearing capacity; settlement; finite element.

ABSTRACT:
The performance of shallow foundations depends directly on the soil properties, being frequently compromised in collapsible lateritic soils, characterized by low bearing capacity and high deformability. A practical alternative to mitigate these limitations is the use of a compacted sand layer beneath the foundation base, with the objective of redistributing stresses and reducing settlements. In this study, the influence of a compacted sand layer on the behavior of a shallow foundation is evaluated through experimental and numerical analysis. The results obtained in a steel plate load test carried out on a compacted sand layer, installed at the same founding level, are compared to the results of a static load test on a circular reinforced concrete shallow foundation directly supported on the collapsible lateritic soil at the same experimental site. Additionally, a numerical analysis was developed to simulate the plate load test and to analyze the stress distribution in the soil. The results indicate that the use of the compacted sand layer promotes better stress redistribution and reduction of settlements, constituting a simple and efficient technique for improving the performance of shallow foundations on soils with low bearing capacity.

Autores

  • Alisson Filmiano Andrade Lopes

  • Italo Santos Guimarães

  • Jean Rodrigo Garcia

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