Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/95257
Author(s): António Viana da Fonseca
Sara Rios Silva
Nuno Cruz
Title: Geotechnical characterization by in situ and lab tests to the back-analysis of a supported excavation in metro do porto
Issue Date: 2010
Abstract: This paper summarizes the geotechnical characterization conducted for the design and subsequent analysis of a strutted excavation in "Metro do Porto". This region is geologically dominated by heterogeneous weathered granite masses with deep residual soil profiles. Local saprolitic soils exhibit, by their nature, a particular behavior characterized by very sensitive and weak relic micro-structures, due to their specific genesis. This study has included the interpretation of a significant volume of in situ test results, triaxial tests over undisturbed samples and monitoring data, giving rise to specific correlations between testing and design parameters. Real time monitoring enabled a back-analysis by FEM of a well instrumented section of the strutted excavation, which was calibrated taking into account the derived correlations and the deformability behavior of this specific geotechnical ambient. This geomaterial, although revealing very high initial stiffness values (for very small strain ranges) has shown low stiffness values for "medium to high" strain levels, reflecting a singular strong non-linearity in the stress-strain behavior. © Springer Science+Business Media B.V. 2008.
URI: https://repositorio-aberto.up.pt/handle/10216/95257
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

Files in This Item:
File Description SizeFormat 
68159.PDF
  Restricted Access
884.89 kBAdobe PDF    Request a copy from the Author(s)


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.