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

doi: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

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

Civil Engineering and Environmental Management

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	From Fundamentals to Applications in Geotechnics
Subtitle of host publication	Proceedings of the 15th Pan-American Conference on Soil Mechanics and Geotechnical Engineering
Editors	D. Manzanal, A.O. Sfriso
Publisher	IOS Press
Pages	3003-3010
Number of pages	8
ISBN (Electronic)	978-1-61499-603-3
ISBN (Print)	978-1-61499-602-6
DOIs	https://doi.org/10.3233/978-1-61499-603-3-3003
Publication status	Published - 2015

Keywords

sea cliffs
slope stability

Documents and Links

10.3233/978-1-61499-603-3-3003

http://ebooks.iospress.nl/book/from-fundamentals-to-applications-in-geotechnics-proceedings-of-the-15th-pan-american-conference-on-soil-mechanics-and-geotechnical-engineering-15-18-november-2

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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{\textregistered})) 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.",

keywords = "sea cliffs, slope stability",

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 proceeding › Conference contribution

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T1 - Stability analysis of sea cliffs in the coastal zone of Baía Formosa / Rio Grande do Norte State – Brazil

AU - Santos, Olavo

AU - de Souza Jr, Carlos

AU - Scudelari, Ada Christina

AU - de Freitas Neto, Osvaldo

AU - Amaro, Venerando

AU - Mickovski, Slobodan

PY - 2015

Y1 - 2015

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.

KW - sea cliffs

KW - slope stability

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M3 - Conference contribution

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BT - From Fundamentals to Applications in Geotechnics

A2 - Manzanal, D.

A2 - Sfriso, A.O.

PB - IOS Press

ER -

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