Instability investigation of cantilevered seacliffs

Auteur(s) et Affiliation(s)

YOUNG, A.P.

Scripps Institution of Oceanography, Univ. of California, San Diego, Etats-Unis

ASHFORD, S.A.

School of Civil and Construction Engineering, Oregon State Univ., Corvallis, Etats-Unis

Description :
This study investigated the instability of 2 such failures that occurred in Solana Beach, California, by combining terrestrial LIDAR scanning, cantilever beam theory and finite element analysis. Each landslide was detected by evaluating the surface change between subsequent high resolution digital terrain models derived from terrestrial LIDAR data. The dimensions of failed cantilever masses were determined using the surface change measurements and then incorporated into failure stress analysis. Both shear and tensile failure modes were investigated as potential cliff failure mechanisms by using a comparison of the back-calculated failure stresses to material strengths found in laboratory testing. Based on the results of this research, the tensile strength of the cliff material was exceeded at both locations, thus causing the cliffs to collapse in tension.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2008, vol. 33, n°. 11, p. 1661-1677, nombre de pages : 17, Références bibliographiques : 1 p.

Date :
2008

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais