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Stability of an undercut sea-cliff along a Cilento coastal stretch (Campania, Southern Italy)

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  • Paolo Budetta

Abstract

This paper deals with a finite element stability analysis performed on a sea-cliff affected by a deep notch. The cliff is about 200 m long with height ranging between 8 and 19 m. The notch at the cliff base is about 1 m above sea level, nearly stretching along the entire cliff toe. Detailed geo-structural and geo-mechanical surveys were performed in situ, and rock samples were tested in laboratory. The relevant physical and mechanical properties were used for determining rock mass strength parameters. A finite element approach was implemented using a two-dimensional elasto-plastic finite-element stress analysis program. The stability analysis shows that the notch causes increasing shear strains spreading from the notch end towards the top cliff. Decreasing strength reduction factors affect the cliff as the notch reaches increased depth into the rock mass, and when its depth is about 2 m the analysis results do not converge. At this stage, an uninterrupted shear plane develops along which a roughly prismatic rock block can slide and then topple. Copyright Springer Science+Business Media B.V. 2011

Suggested Citation

  • Paolo Budetta, 2011. "Stability of an undercut sea-cliff along a Cilento coastal stretch (Campania, Southern Italy)," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 56(1), pages 233-250, January.
    • Handle: RePEc:spr:nathaz:v:56:y:2011:i:1:p:233-250
    DOI: 10.1007/s11069-010-9565-y
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    Cited by:

    1. Paolo Budetta & Claudio Luca, 2015. "Wedge failure hazard assessment by means of a probabilistic approach for an unstable sea-cliff," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 76(2), pages 1219-1239, March.

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