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Offshore Site Investigation of Sandy Sediments for Anchoring and Foundation Design of Renewable Energy Applications—NW Center of Portugal

2025-08-08Artigo científico Acesso aberto
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dc.contributor.authorPombo, Joaquim
dc.contributor.authorRodrigues, Aurora
dc.contributor.authorSilva, Paula F. da
dc.contributor.institutionGeoBioTec - Geobiociências, Geoengenharias e Geotecnologias
dc.contributor.pblMDPI - Multidisciplinary Digital Publishing Institute
dc.date.accessioned2025-11-06T21:58:53Z
dc.date.available2025-11-06T21:58:53Z
dc.date.issued2025-08-08
dc.descriptionFunding Information: Paula F. da Silva acknowledges the support given by R&D Unit GEOBIOTEC—UID/04035: GeoBioCiências, GeoTecnologias e GeoEngenharias. Publisher Copyright: © 2025 by the authors.
dc.description.abstractThe expansion of offshore renewable energy development in Portugal necessitates accurate geological and geotechnical site characterization, especially in regions with limited baseline information. This study focuses on the S. Pedro de Moel area (NW central Portugal), which is characterized by sandy sediments, with the aim of supporting the preliminary design of anchoring and foundation systems for renewable energy structures. An integrated methodology was applied, combining multibeam bathymetry, acoustic backscatter data, high-resolution seismic reflection profiling, sediment sampling, and onshore laboratory testing. Seismic interpretation identified three subsurface units: (1) a deformed carbonated sandstone serving as the acoustic basement; (2) a well-graded sandy gravel layer, up to 8 m thick, interpreted as a marginal marine deposit; and (3) a modern sandy deposit, up to 7 m thick, with variable silt content. Geotechnical analyses yielded effective friction angles for sandy sediments ranging from 39 to 44°, and deformation moduli between 22 MPa and 54 MPa. The sedimentary succession exhibits marked lateral and vertical heterogeneity, which must be considered in engineering design. This cost-effective methodology offers a viable alternative to offshore in situ testing, enabling medium-scale site characterization and providing essential information to support the development of offshore renewable energy infrastructure.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent23
dc.format.extent19410455
dc.identifier.doi10.3390/jmse13081521
dc.identifier.issn2077-1312
dc.identifier.otherPURE: 134896384
dc.identifier.otherPURE UUID: 7baa2289-abe0-4b7a-8580-aa546a025653
dc.identifier.otherScopus: 105014455897
dc.identifier.otherWOS: 001557817500001
dc.identifier.otherORCID: /0000-0002-5900-3885/work/196265582
dc.identifier.urihttp://hdl.handle.net/10362/190246
dc.identifier.urlhttps://www.scopus.com/pages/publications/105014455897
dc.identifier.urlhttps://www.webofscience.com/wos/woscc/full-record/WOS:001557817500001
dc.language.isoeng
dc.peerreviewedyes
dc.subjectGeotechnical properties
dc.subjectOffshore site characterization
dc.subjectPortuguese continental shelf
dc.subjectRenewable energy foundations
dc.subjectSandy sediments
dc.subjectCivil and Structural Engineering
dc.subjectWater Science and Technology
dc.subjectOcean Engineering
dc.subjectSDG 7 - Affordable and Clean Energy
dc.titleOffshore Site Investigation of Sandy Sediments for Anchoring and Foundation Design of Renewable Energy Applications—NW Center of Portugalen
dc.typejournal article
degois.publication.firstPage1
degois.publication.issue8
degois.publication.lastPage23
degois.publication.titleJournal of Marine Science and Engineering
degois.publication.volume13
dspace.entity.typePublication
rcaap.rightsopenAccess

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