Characterization of the instability mechanisms affecting slopes on carbonatic Flysch: Alicante (SE Spain), case study


Autoria(s): Cano, Miguel; Tomás, Roberto
Contribuinte(s)

Universidad de Alicante. Departamento de Ingeniería Civil

Ingeniería del Terreno y sus Estructuras (InTerEs)

Data(s)

03/07/2014

03/07/2014

01/04/2013

Resumo

The studied Flysch sequence of Alicante occupies a widely populated area crossed by main communication routes. The slopes existing on this area usually suffer slope instabilities that cause substantial damage and a very high maintenance cost. In order to assess the type of instability mechanisms affecting these heterogeneous carbonatic slopes, in this paper a wide inventory of 194 Flysch rock slopes has been performed, reporting the existing lithologies, their competence and their relative arrangement and the geometrical relationship between bedding and the slope and the associated instability mechanism. All these data have been jointly used for performing an instability mechanisms characterization. For systematically characterizing the wide type of complex rock exposures existing in the study area, they are divided into basic units referred as lithological pattern columns to which the different observed instability mechanisms are associated. Inventoried instability mechanisms are diverse and sometimes are combined with each other. Rockfalls are a very common instability mechanism associated to the differential weathering and sapping of the marly lithologies which are present in a wide number of geometrical combinations. The other instability mechanisms closely depend on the combination of the geometrical and lithological parameters. Therefore, this work provides a new basic tool which can be easily used during preliminary project stages for knowing the instability mechanisms which can affect rock slopes excavated on carbonatic Flysch heterogeneous geological formations.

This work was partially funded by the University of Alicante under the projects vigrob-157 uausti10–18, uausti11–11 and gre09–40 and by the Generalitat Valenciana within project gv/2011/044.

Identificador

Engineering Geology. 2013, 156: 68-91. doi:10.1016/j.enggeo.2013.01.009

0013-7952 (Print)

1872-6917 (Online)

http://hdl.handle.net/10045/38665

10.1016/j.enggeo.2013.01.009

Idioma(s)

eng

Publicador

Elsevier

Relação

http://dx.doi.org/10.1016/j.enggeo.2013.01.009

Direitos

info:eu-repo/semantics/restrictedAccess

Palavras-Chave #Flysch #Carbonate rocks #Instability mechanisms #Lithological pattern column #Weathering behaviour #Competence #Ingeniería del Terreno
Tipo

info:eu-repo/semantics/article