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Abstract(s)
Este trabalho pretende enfatizar a importância da elaboração de uma base de dados extensa e
robusta para o melhoramento da cartografia geotécnica subterrânea do maciço granítico do
sector de Carvalhido–Burgães (Porto). Este estudo envolveu a análise e o refinamento das
principais características geomecânicas ao longo de um traçado com cerca de 1220 m, para a
caracterização do maciço rochoso da galeria subterrânea Carvalhido–Burgães. Para esta
caracterização foram coligidos e uniformizados dados geológicos, geotécnicos e geomecânicos
relativos a várias campanhas de campo, realizadas entre 2005 e 2011, tendo estado a técnica da
amostragem linear aplicada ao grau de compartimentação do maciço rochoso na base do seu
estudo. Além disso, procedeu‐se a um tratamento estatístico das descontinuidades, bem como
dos parâmetros geológico‐geotécnicos e geomecânicos a estas associados. O zonamento
geotécnico do maciço granítico foi realizado sempre em estreita ligação com o conhecimento das
características do maciço in situ. Pretende‐se que esta metodologia contribua para um melhor
conhecimento da compartimentação dos maciços rochosos em geral e, em particular, do modelo
geomecânico comportamental do maciço rochoso do Porto.
This work intends to emphasize the importance of an extensive database in order to support the geotechnical mapping of underground granitic rock mass of the Carvalhido–Burgães sector (Porto). A detailed study and improvement of the main geomechanical constraints were done along an underground extension of ca. 1220 m, approximately, for the characterization of Carvalhido–Burgães granitic massif. For this characterization, geological, geotechnical and geomechanical data from five fieldwork campaigns, between 2005 and 2011, were analysed and integrated. Scanline sampling technique of discontinuities applied to the rock block size was on the basis of all these data. In addition, the evaluation methods of field data for discontinuities sets and the statistical characterisation of all their parameters are also presented. The geotechnical zoning of the granitic rock mass was refined in a straight connection with the knowledge of in situ rock mass features. This methodology contributed to a better understanding of the rock‐mass block size and proved valuable in deepening our knowledge, in particularly, on Porto rock mass compartmental geomechanical modelling.
This work intends to emphasize the importance of an extensive database in order to support the geotechnical mapping of underground granitic rock mass of the Carvalhido–Burgães sector (Porto). A detailed study and improvement of the main geomechanical constraints were done along an underground extension of ca. 1220 m, approximately, for the characterization of Carvalhido–Burgães granitic massif. For this characterization, geological, geotechnical and geomechanical data from five fieldwork campaigns, between 2005 and 2011, were analysed and integrated. Scanline sampling technique of discontinuities applied to the rock block size was on the basis of all these data. In addition, the evaluation methods of field data for discontinuities sets and the statistical characterisation of all their parameters are also presented. The geotechnical zoning of the granitic rock mass was refined in a straight connection with the knowledge of in situ rock mass features. This methodology contributed to a better understanding of the rock‐mass block size and proved valuable in deepening our knowledge, in particularly, on Porto rock mass compartmental geomechanical modelling.
Description
Keywords
Maciços rochosos Geomecânica Técnica de amostragem linear Rock masses Geomechanics Scanline sampling technique
Citation
Publisher
Instituto Politécnico do Porto. Instituto Superior de Engenharia do Porto