Título: | RISK ASSESSMENT ON A FORESTED SLOPE AT PUC-RIO S GÁVEA CAMPUS | ||||||||||||
Autor: |
MARIA BEATRIZ DA C A DOS SANTOS |
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Colaborador(es): |
JOSE TAVARES ARARUNA JUNIOR - Orientador |
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Catalogação: | 16/MAI/2023 | 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=62545&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=62545&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.62545 | ||||||||||||
Resumo: | |||||||||||||
Geological hazards, such as landslides, are the biggest cause of natural
disasters in urban environments. In addition to the negative environmental impacts,
this phenomenon implies socioeconomic consequences, since there is a need for
immediate repairs to the degraded area. Risk assessment, especially in urbanized
areas, is necessary to avoid possible disasters and ensure the quality of life of the
surrounding population. In the present work, the risk assessment was carried out in
three sections of the slope of Morro Dois Irmãos, located in Gávea, Rio de Janeiro,
which suffered successive ruptures after intense rainfall. The assessment and
classification of risk by the qualitative approach was determined using the
methodology proposed by the Ministry of Cities and IPT and GIDES-CPRM through
field inspection. The slope was classified as high to very high slip risk. The results
of the quantitative approach, obtained by deterministic stability analysis based on
the Morgenstern-Price method, showed that the critical rupture surfaces of the
sections have a safety factor lower than 1.5. In the FOSM stability probabilistic
analyses, rupture probabilities of 0.19, 0.14 and 0.08 were obtained, with the
sections classified as Dangerous with regard to the expected performance level.
As a result, the local vulnerability index is in the range of 0.7 to 0.8. For the
analyzed sections, actions are needed as a way to mitigate and recover the area
environmentally and socially.
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