Kinematics and rheology of a major landslide based on signal analysis / S. I. Pytharouli in Géotechnique, Vol. 60 N° 3 (Mars 2010)  

Public ISBD [article]  inGéotechnique > Vol. 60 N° 3 (Mars 2010) . - pp. 207–222 Titre : Kinematics and rheology of a major landslide based on signal analysis Type de document : texte imprimé Auteurs : S. I. Pytharouli, Auteur ; S. C. Stiros, Auteur Année de publication : 2011 Article en page(s) : pp. 207–222 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Creep Statistical analysis Deformation Slopes Landslides Monitoring Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : A detailed geodetic record, which is over 23 years old and describes the kinematics of the Mandria (or Left Bank Upstream) landslide – a major deep-seated landslide close to the Polyphyton dam, Greece – was analysed on the basis of advanced signal analysis techniques without any geotechnical constraints. It was found that all points share the same pattern of displacement, which characterises both short and longer records. The overall behaviour of the landslide can be described as viscoelastic and viscous or elastoviscous, with multi-annual periodic effects superimposed on the creep, as the results of spectral analysis indicate. The landslide seems insensitive to seasonal variations of precipitation and to annual fluctuations of the reservoir level, although the first filling of the reservoir is likely to have had an important role in its movement. There is a lack of subsurface information, but the available data indicate that the landslide corresponds to a rigid mass dominated by brittle behaviour and internal shearing, with its kinematics controlled by thin mylonitic layers along low- and high-angle faults. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.8.p.049 [article] Kinematics and rheology of a major landslide based on signal analysis [texte imprimé] / S. I. Pytharouli, Auteur ; S. C. Stiros, Auteur . - 2011 . - pp. 207–222. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 60 N° 3 (Mars 2010) . - pp. 207–222 Mots-clés : Creep Statistical analysis Deformation Slopes Landslides Monitoring Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : A detailed geodetic record, which is over 23 years old and describes the kinematics of the Mandria (or Left Bank Upstream) landslide – a major deep-seated landslide close to the Polyphyton dam, Greece – was analysed on the basis of advanced signal analysis techniques without any geotechnical constraints. It was found that all points share the same pattern of displacement, which characterises both short and longer records. The overall behaviour of the landslide can be described as viscoelastic and viscous or elastoviscous, with multi-annual periodic effects superimposed on the creep, as the results of spectral analysis indicate. The landslide seems insensitive to seasonal variations of precipitation and to annual fluctuations of the reservoir level, although the first filling of the reservoir is likely to have had an important role in its movement. There is a lack of subsurface information, but the available data indicate that the landslide corresponds to a rigid mass dominated by brittle behaviour and internal shearing, with its kinematics controlled by thin mylonitic layers along low- and high-angle faults. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.8.p.049

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