Documents disponibles écrits par cet auteur

Embedded cantilever retaining walls in sand / A. Z. Li in Géotechnique, Vol. 60 N° 11 (Novembre 2010) 

Public ISBD [article]  in Géotechnique > Vol. 60 N° 11 (Novembre 2010) . - pp. 813–823 Titre : Embedded cantilever retaining walls in sand Type de document : texte imprimé Auteurs : A. Z. Li, Auteur ; B. M. Lehane, Auteur Année de publication : 2011 Article en page(s) : pp. 813–823 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Sands  Sands  Case  history  Retaining  walls Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper describes a case history involving staged excavation adjacent to an instrumented cantilever bored pile contiguous wall in sand. The instrumentation enabled reliable estimates to be made of the variation of pile bending moments from which observations are made related to the development of lateral earth pressures. Particle image velocimetry was employed to obtain a unique dataset of lateral and vertical displacement measurements behind the wall, which may be used to evaluate existing predictive approaches for assessment of excavation-induced movements. Simple finite-element back-analyses of the experiment, employing a linear elastic Mohr–Coulomb soil model, showed that measured wall displacements and moments could be predicted using expected effective stress strength parameters, but that best-fit equivalent linear operational stiffnesses were well below those commonly assumed in practice. Creep is shown to have a critical effect on the displacements of the wall and behind the wall and needs to be incorporated in any realistic predictive approach. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.8.p.147 [article] Embedded cantilever retaining walls in sand [texte imprimé] / A. Z. Li, Auteur ; B. M. Lehane, Auteur . - 2011 . - pp. 813–823. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 60 N° 11 (Novembre 2010) . - pp. 813–823 Mots-clés : Sands  Sands  Case  history  Retaining  walls Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper describes a case history involving staged excavation adjacent to an instrumented cantilever bored pile contiguous wall in sand. The instrumentation enabled reliable estimates to be made of the variation of pile bending moments from which observations are made related to the development of lateral earth pressures. Particle image velocimetry was employed to obtain a unique dataset of lateral and vertical displacement measurements behind the wall, which may be used to evaluate existing predictive approaches for assessment of excavation-induced movements. Simple finite-element back-analyses of the experiment, employing a linear elastic Mohr–Coulomb soil model, showed that measured wall displacements and moments could be predicted using expected effective stress strength parameters, but that best-fit equivalent linear operational stiffnesses were well below those commonly assumed in practice. Creep is shown to have a critical effect on the displacements of the wall and behind the wall and needs to be incorporated in any realistic predictive approach. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.8.p.147