Publicação
Expansão da Linha Circular do Metro de Lisboa. A importância da prospeção geotécnica na definição dos métodos construtivos numa obra especial
| Resumo: | This report describes the curricular internship that took place between October 2023 and June 2024 at the A.C.E. supervision consortium Consulgal-Tecnoplano, as part of the master’s program in Geology at the Faculty of Sciences of the University of Lisbon. The main objective of the internship was to analyse the importance of geotechnical site investigation in definition of construction methods, particularly in the construction of tunnels and stations for the Lisbon Metro line located near to Cais do Sodré. The geotechnical investigation methodologies applied include in situ tests (SPT, CPTU, PMT, Lugeon) and laboratory tests (Atterberg limits, oedometer, grain size distribution, and rock strength), as well as geomechanical classifications (RMR and GSI). These techniques enabled a detailed characterization of the geological formations crossed, and providing essential parameters for defining construction solutions. During the internship, various technical procedures were monitored in the fields of Civil Engineering, Geology, and Geotechnics, including the execution of jet-grouting columns (reinforced and unreinforced), piles and micropiles, diaphragm walls, installation and interpretation of geotechnical instrumentation, and the analysis of geotechnical profiles. The linear arrangement of the borehole grid along the tunnel alignment allowed for effective geotechnical zoning and the derivation of reliable design parameters. Based on this data, appropriate retaining structures and foundations were designed, which varied along with the alignment according to the geological formations and specific engineering challenges encountered. The results demonstrate that the integration of geological knowledge, geotechnical data analysis, and methodological adaptation throughout the construction phase significantly contributed to the safety, feasibility, and optimization of the project. This study highlights the critical role of geotechnical investigation in the design and implementation of underground infrastructures in urban environments. |
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| Autores principais: | Gonçalves,Tiago da Costa |
| Assunto: | Site investigation and testing methods peripheral retaining walls geotechnical zoning geotechnical parameters foundations |
| Ano: | 2025 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Lisboa |
| Idioma: | português |
| Origem: | Repositório da Universidade de Lisboa |
| Resumo: | This report describes the curricular internship that took place between October 2023 and June 2024 at the A.C.E. supervision consortium Consulgal-Tecnoplano, as part of the master’s program in Geology at the Faculty of Sciences of the University of Lisbon. The main objective of the internship was to analyse the importance of geotechnical site investigation in definition of construction methods, particularly in the construction of tunnels and stations for the Lisbon Metro line located near to Cais do Sodré. The geotechnical investigation methodologies applied include in situ tests (SPT, CPTU, PMT, Lugeon) and laboratory tests (Atterberg limits, oedometer, grain size distribution, and rock strength), as well as geomechanical classifications (RMR and GSI). These techniques enabled a detailed characterization of the geological formations crossed, and providing essential parameters for defining construction solutions. During the internship, various technical procedures were monitored in the fields of Civil Engineering, Geology, and Geotechnics, including the execution of jet-grouting columns (reinforced and unreinforced), piles and micropiles, diaphragm walls, installation and interpretation of geotechnical instrumentation, and the analysis of geotechnical profiles. The linear arrangement of the borehole grid along the tunnel alignment allowed for effective geotechnical zoning and the derivation of reliable design parameters. Based on this data, appropriate retaining structures and foundations were designed, which varied along with the alignment according to the geological formations and specific engineering challenges encountered. The results demonstrate that the integration of geological knowledge, geotechnical data analysis, and methodological adaptation throughout the construction phase significantly contributed to the safety, feasibility, and optimization of the project. This study highlights the critical role of geotechnical investigation in the design and implementation of underground infrastructures in urban environments. |
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