A cliff failure in Ericeira (Centre of Portugal) fishing harbour south access

Alexandre Santos-Ferreira, Ana Paula F Da Silva, Cláudia Santos, E. Dias, M. Cabral, Liliana Ribeiro, Cláudia Rocha

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

Several of the Portuguese small harbours present cliff stability problems, either in their road access, or in the interface with the sea. So the study, the monitoring and the risk analysis of those cliffs are also a major concern to Portuguese Harbour Authority. In some cases, as in the one detailed in this paper, the cliffs are shaped in alternating weak and hard rock layers, undergoing differential erosion processes. In the particular case that will be presented, a century and a half old retaining wall (1853), supporting the south access road to Ericeira fishing harbour, centre of Portugal, was founded on a hard sandstone layer. This retaining wall collapsed at beginning of May 2012. The paper details the failure mechanism as identified, and presents the solution adopted for the retaining wall repair works. The proposed stabilization solutions are discussed, both the immediate implemented measures and the permanent planned stabilization methods. .

Original languageEnglish
Title of host publicationEngineering Geology for Society and Territory
Subtitle of host publicationLandslide Processes
PublisherSPRINGER INTERNATIONAL PUBLISHING AG
Pages2089-2092
Number of pages4
Volume2
ISBN (Electronic)978-3-319-09057-3
ISBN (Print)978-3-319-09056-6
DOIs
Publication statusPublished - 1 Jan 2015
Event12th International IAEG Congress - Torino, Italy
Duration: 15 Sep 201419 Sep 2014
Conference number: 12th

Conference

Conference12th International IAEG Congress
CountryItaly
CityTorino
Period15/09/1419/09/14

Keywords

  • Coastal Cliff
  • Differential Erosion
  • Rock Fall
  • Slope Stability

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