Análise de estabilidade de uma falésia na região central de Pipa – Tibau do Sul/RN
The erosion processes to which the seacliffs are subjected trigger the continuous occurrence of mass movements. Periods of high rainfall and the increasing occupation of areas adjacent to seacliffs enhance the occurrence of these mass movements, which can cause high socioeconomic and environmenta...
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/50457 |
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| Resumo: | The erosion processes to which the seacliffs are subjected trigger the continuous occurrence of
mass movements. Periods of high rainfall and the increasing occupation of areas adjacent to
seacliffs enhance the occurrence of these mass movements, which can cause high
socioeconomic and environmental damage. Thus, the present study aimed to carry out stability
analyzes by methods based on limit equilibrium and stress analysis, when applied to the case
of a seacliff located in the central region of Pipa - Tibau do Sul/RN. Associated to the seacliff
in question, which is located in an area of high real estate speculation and touristic activity,
potentially favorable conditions for the outbreak of mass movements were identified. For this
purpose, parameters of mechanical behavior of the soils of the Barreiras Formation under
natural moisture content and saturated conditions, derived from studies carried out in the region,
were used to support the analyses. Furthermore, slope profiles were drawn considering the
geometry of the seacliff and situations observed at the site, such as the presence of
accumulations of colluvium adjacent to the slope, incisions at its base and overload at its top.
The influence of these factors on the stability of the slope was evaluated for the soils in the
natural moisture content and saturated conditions in the stress analyses, in addition to being
considered wetting fronts in the limit equilibrium analyses. The results showed that the
accumulation of colluvium near the base of the seacliff tends to contribute to an increase in its
safety factor on a limit-equilibrium based analysis. On the other hand, the presence of a basal
incision has the potential to trigger significant mass movements on the seacliff, and its effect is
better evaluated by means of stress analysis. In all situations, the considered overload and the
hypotheses with soil saturation of the layers were unfavorable factors for the stability of the
slope. |
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