Stability of an undercut sea-cliff along a Cilento coastal stretch (Campania, Southern Italy)
Author: Budetta, Paolo
Source: Natural Hazards, Volume 56, Number 1, January 2011 , pp. 233-250(18)
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.
Document Type: Research Article
Affiliations: Section of Applied Geology, Department of Hydraulics, Geotechnical and Environmental Engineering, University of Naples “Federico II”, Piazzale Tecchio 80, 80125, Naples, Italy, Email: firstname.lastname@example.org
Publication date: 2011-01-01