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58 - ESTACA METÁLICA LAMINADA EM GRAU 60 TRABALHANDO POR PONTA

Doi: 10.47094/COBRAMSEG2026.5/58

PALAVRAS CHAVE: Estaca Metálicas, Grau 60, Prova de Carga Estática.

KEYWORDS: Steel Pile, Grade 60, Static Load Test.

ABSTRACT:
The steel piles or H-pile in deep foundation works has been increasing in Brazil, particularly in regions where driving piles achieve the bedrock which allows the development of high allowable loads. In 2024, the first national publication involving a Static Load Test (SLT) H-pile manufactured with Grade 60 steel was presented, demonstrating significant improvements in both structural and geotechnical performance associated with the use of higher-strength steel profiles. Going ahead with these investigations, the present study reports the results of a new SLT carried out on an HP 310×79 GR 60 pile driven in soil conditions that favor the predominant development of end-bearing resistance. The pile was driven until achieve the bedrock. The load test was conducted up to a maximum load of 400 tf, corresponding to approximately 400 MPa of stress in the steel profile, considering the gross steel area (without deduction for corrosion allowance). The results indicated a geotechnical behavior characterized by elastic deformations compatible with rock-supported foundations. After the application of the maximum load, structural failure of the pile was observed, indicating that the performance limit during the test was governed by the structural resistance of the steel rather than by the soil behavior. This finding reinforces the effectiveness of the solution when piles are driven to the bedrock and demonstrates the potential use of Grade 60 steel to increase the available structural capacity in projects requiring higher working loads. The results obtained in this study contribute to consolidating the use of high-strength steel piles under end-bearing support conditions, providing unprecedented experimental evidence for the Brazilian scenario. The analysis also indicates that the use of Grade 60 steel profiles can optimize designs, reduce material quantities (and consequently costs), and increase load capacity. This work complements the existing literature and strengthens the technical understanding of the behavior of steel piles under high loading levels, opening opportunities for further research and practical applications in the field of foundation engineering.

Autores

  • Alline Evangelista Silva

  • Dirney Cury Filho

  • Tiago Garcia Rodriguez

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