Título: | NUMERICAL MODELING OF EXCAVATIONS IN A JOINTED ROCK MASS WITH THE EVALUATION OF PORE-WATER PRESSURE IN THE DISCONTINUITIES | ||||||||||||
Autor: |
RAFAELLA VILLELA SAMPAIO |
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Colaborador(es): |
RAQUEL QUADROS VELLOSO - Orientador EURIPEDES DO AMARAL VARGAS JUNIOR - Coorientador |
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Catalogação: | 12/ABR/2022 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: | THESIS | ||||||||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=58611&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=58611&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.58611 | ||||||||||||
Resumo: | |||||||||||||
This work aims to verify the influence of the stress field changing around an
excavation in a jointed rock mass, noticing the fracture closure and the hydraulic
conductivity decrease in the region surrounding the excavation. At first, the basic
characteristics that should be considered in jointed rock masses analyses are
presented, pointing out the potential effects caused by excavations in such
materials. A brief literature review presents some types of numerical analysis
techniques available for discontinuous medium modeling, focusing on the discrete
elements methods and, specifically, in the distinct element method (DEM), applied
in the UDEC software by Itasca Consulting Group Inc., which was utilized in this
work. The simulations make use of a hydromechanical coupling, being the rock
mass represented by an assembly of blocks. The water flow takes place among the
discontinuities, which are treated as blocks’ boundaries. A hypothetical model was
used for modeling validation by comparison with analytical solutions from the
literature. Besides that, it was accomplished a real case study of two tunnels located
at an important road in Rio de Janeiro city. The parametric analyses of the problem
show the influence of changing some important variables in this type of
phenomenon. At last, all the results have been discussed, with final considerations
and future works suggestions.
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