Stability analysis of sea cliffs in the coastal zone of Baía Formosa / Rio Grande do Norte State – Brazil

Olavo Santos, Carlos de Souza Jr, Ada Christina Scudelari, Osvaldo de Freitas Neto, Venerando Amaro, Slobodan Mickovski

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The coastal region of the state of Rio Grande do Norte (RN), in northeastern Brazil, is formed by dunes and cliffs that, according to previous works, have suffered a process of retreat. Destabilization of the cliffs results from the erosive action at their base due to the attack of the waves and sea currents as well as mass movements associated with rainfall in the rainy season. The aim of this study was at analyze the cliff stability in the area of Baía Formosa/RN. The
area was divided into four stretches. For each stretch, cross sections were obtained. Undisturbed and disturbed soil samples were taken for testing along the length of the studied area. Characterization and direct shear tests were performed to classify the soil and to obtain the strength properties, respectively. The stability analyses were performed using a commercially available software (GEO 5®)) using the FEM. The results are shown by graphs presenting the variation of the factor of safety along each stretch studied. With this, it was possible to identify the most critical areas with respect the occurrence of the mass movement.
Original languageEnglish
Title of host publicationFrom Fundamentals to Applications in Geotechnics
Subtitle of host publicationProceedings of the 15th Pan-American Conference on Soil Mechanics and Geotechnical Engineering
EditorsD. Manzanal, A.O. Sfriso
PublisherIOS Press
Pages3003-3010
Number of pages8
ISBN (Electronic)978-1-61499-603-3
ISBN (Print)978-1-61499-602-6
DOIs
Publication statusPublished - 2015

Fingerprint

cliff
stability analysis
coastal zone
mass movement
shear test
dune
soil
cross section
safety
software
rainfall
sea

Keywords

  • sea cliffs
  • slope stability

Cite this

Santos, O., de Souza Jr, C., Scudelari, A. C., de Freitas Neto, O., Amaro, V., & Mickovski, S. (2015). Stability analysis of sea cliffs in the coastal zone of Baía Formosa / Rio Grande do Norte State – Brazil. In D. Manzanal, & A. O. Sfriso (Eds.), From Fundamentals to Applications in Geotechnics: Proceedings of the 15th Pan-American Conference on Soil Mechanics and Geotechnical Engineering (pp. 3003-3010). IOS Press. https://doi.org/10.3233/978-1-61499-603-3-3003
Santos, Olavo ; de Souza Jr, Carlos ; Scudelari, Ada Christina ; de Freitas Neto, Osvaldo ; Amaro, Venerando ; Mickovski, Slobodan. / Stability analysis of sea cliffs in the coastal zone of Baía Formosa / Rio Grande do Norte State – Brazil. From Fundamentals to Applications in Geotechnics: Proceedings of the 15th Pan-American Conference on Soil Mechanics and Geotechnical Engineering. editor / D. Manzanal ; A.O. Sfriso. IOS Press, 2015. pp. 3003-3010
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title = "Stability analysis of sea cliffs in the coastal zone of Ba{\'i}a Formosa / Rio Grande do Norte State – Brazil",
abstract = "The coastal region of the state of Rio Grande do Norte (RN), in northeastern Brazil, is formed by dunes and cliffs that, according to previous works, have suffered a process of retreat. Destabilization of the cliffs results from the erosive action at their base due to the attack of the waves and sea currents as well as mass movements associated with rainfall in the rainy season. The aim of this study was at analyze the cliff stability in the area of Ba{\'i}a Formosa/RN. Thearea was divided into four stretches. For each stretch, cross sections were obtained. Undisturbed and disturbed soil samples were taken for testing along the length of the studied area. Characterization and direct shear tests were performed to classify the soil and to obtain the strength properties, respectively. The stability analyses were performed using a commercially available software (GEO 5{\circledR})) using the FEM. The results are shown by graphs presenting the variation of the factor of safety along each stretch studied. With this, it was possible to identify the most critical areas with respect the occurrence of the mass movement.",
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author = "Olavo Santos and {de Souza Jr}, Carlos and Scudelari, {Ada Christina} and {de Freitas Neto}, Osvaldo and Venerando Amaro and Slobodan Mickovski",
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Santos, O, de Souza Jr, C, Scudelari, AC, de Freitas Neto, O, Amaro, V & Mickovski, S 2015, Stability analysis of sea cliffs in the coastal zone of Baía Formosa / Rio Grande do Norte State – Brazil. in D Manzanal & AO Sfriso (eds), From Fundamentals to Applications in Geotechnics: Proceedings of the 15th Pan-American Conference on Soil Mechanics and Geotechnical Engineering. IOS Press, pp. 3003-3010. https://doi.org/10.3233/978-1-61499-603-3-3003

Stability analysis of sea cliffs in the coastal zone of Baía Formosa / Rio Grande do Norte State – Brazil. / Santos, Olavo; de Souza Jr, Carlos; Scudelari, Ada Christina; de Freitas Neto, Osvaldo; Amaro, Venerando; Mickovski, Slobodan.

From Fundamentals to Applications in Geotechnics: Proceedings of the 15th Pan-American Conference on Soil Mechanics and Geotechnical Engineering. ed. / D. Manzanal; A.O. Sfriso. IOS Press, 2015. p. 3003-3010.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AU - Amaro, Venerando

AU - Mickovski, Slobodan

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N2 - The coastal region of the state of Rio Grande do Norte (RN), in northeastern Brazil, is formed by dunes and cliffs that, according to previous works, have suffered a process of retreat. Destabilization of the cliffs results from the erosive action at their base due to the attack of the waves and sea currents as well as mass movements associated with rainfall in the rainy season. The aim of this study was at analyze the cliff stability in the area of Baía Formosa/RN. Thearea was divided into four stretches. For each stretch, cross sections were obtained. Undisturbed and disturbed soil samples were taken for testing along the length of the studied area. Characterization and direct shear tests were performed to classify the soil and to obtain the strength properties, respectively. The stability analyses were performed using a commercially available software (GEO 5®)) using the FEM. The results are shown by graphs presenting the variation of the factor of safety along each stretch studied. With this, it was possible to identify the most critical areas with respect the occurrence of the mass movement.

AB - The coastal region of the state of Rio Grande do Norte (RN), in northeastern Brazil, is formed by dunes and cliffs that, according to previous works, have suffered a process of retreat. Destabilization of the cliffs results from the erosive action at their base due to the attack of the waves and sea currents as well as mass movements associated with rainfall in the rainy season. The aim of this study was at analyze the cliff stability in the area of Baía Formosa/RN. Thearea was divided into four stretches. For each stretch, cross sections were obtained. Undisturbed and disturbed soil samples were taken for testing along the length of the studied area. Characterization and direct shear tests were performed to classify the soil and to obtain the strength properties, respectively. The stability analyses were performed using a commercially available software (GEO 5®)) using the FEM. The results are shown by graphs presenting the variation of the factor of safety along each stretch studied. With this, it was possible to identify the most critical areas with respect the occurrence of the mass movement.

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Santos O, de Souza Jr C, Scudelari AC, de Freitas Neto O, Amaro V, Mickovski S. Stability analysis of sea cliffs in the coastal zone of Baía Formosa / Rio Grande do Norte State – Brazil. In Manzanal D, Sfriso AO, editors, From Fundamentals to Applications in Geotechnics: Proceedings of the 15th Pan-American Conference on Soil Mechanics and Geotechnical Engineering. IOS Press. 2015. p. 3003-3010 https://doi.org/10.3233/978-1-61499-603-3-3003