Documents disponibles écrits par cet auteur

Analysis and performance of piled rafts designed using innovative criteria / Luca de Sanctis in Journal of geotechnical and geoenvironmental engineering, Vol. 134 n°8 (Août 2008) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 134 n°8 (Août 2008) . - pp. 1118–1128 Titre : Analysis and performance of piled rafts designed using innovative criteria Type de document : texte imprimé Auteurs : Luca de Sanctis, Auteur ; Gianpiero Russo, Auteur Année de publication : 2008 Article en page(s) : pp. 1118–1128 Note générale : Geotecnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Raft  foundations  Pile  foundations  Foundation  design  Foundation  settlement Résumé : In this paper the main criteria adopted for the design and some aspects of the observed behavior of the piled foundations of a cluster of circular steel tanks are reported. They were designed to store sodium hydroxide, a toxic liquid with a unit weight of 15.1kN/m3 . Shallow foundations would have been safe against a bearing capacity failure, while the predicted settlement was beyond the allowed limit. Accordingly piles were designed to reduce the settlement and improve the overall performance of the foundations. While conventional capacity based design approach led to a total of 160 piles to support the five tanks the settlement based design approach led to a total of 65 piles achieving significant savings on the cost of the project. The settlements of four out of the five tanks were measured and for two out of the five tanks the load sharing among the raft and the piles was also observed. Both the analyses carried out at the design stage and the back-analyses of the observed behavior were based on the interaction factors method as implemented in the computer code NAPRA [Russo (1998), Int. J. Numer. Anal. Methods Geomech., 22(6), 477–493]. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A8%2811 [...] [article] Analysis and performance of piled rafts designed using innovative criteria [texte imprimé] / Luca de Sanctis, Auteur ; Gianpiero Russo, Auteur . - 2008 . - pp. 1118–1128. Geotecnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 134 n°8 (Août 2008) . - pp. 1118–1128 Mots-clés : Raft  foundations  Pile  foundations  Foundation  design  Foundation  settlement Résumé : In this paper the main criteria adopted for the design and some aspects of the observed behavior of the piled foundations of a cluster of circular steel tanks are reported. They were designed to store sodium hydroxide, a toxic liquid with a unit weight of 15.1kN/m3 . Shallow foundations would have been safe against a bearing capacity failure, while the predicted settlement was beyond the allowed limit. Accordingly piles were designed to reduce the settlement and improve the overall performance of the foundations. While conventional capacity based design approach led to a total of 160 piles to support the five tanks the settlement based design approach led to a total of 65 piles achieving significant savings on the cost of the project. The settlements of four out of the five tanks were measured and for two out of the five tanks the load sharing among the raft and the piles was also observed. Both the analyses carried out at the design stage and the back-analyses of the observed behavior were based on the interaction factors method as implemented in the computer code NAPRA [Russo (1998), Int. J. Numer. Anal. Methods Geomech., 22(6), 477–493]. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A8%2811 [...]

Use of a line of piles to prevent damages induced by tunnel excavation / Emilio Bilotta in Journal of geotechnical and geoenvironmental engineering, Vol. 137 N° 3 (Mars 2011) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 3 (Mars 2011) . - pp. 254-262 Titre : Use of a line of piles to prevent damages induced by tunnel excavation Type de document : texte imprimé Auteurs : Emilio Bilotta, Auteur ; Gianpiero Russo, Auteur Année de publication : 2011 Article en page(s) : pp. 254-262 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Tunnels  Piles  Excavation  Settlement  Damage  Protective  structures Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : Buildings founded in proximity to shallow tunnels under construction may be damaged by the ground displacements induced by tunneling. This is a matter of concern for design, and a variety of protective interventions are currently adopted to prevent such damages. Among these, rows of piles or jet-grouting columns are widely diffused. In this paper, the effectiveness of a simple row of piles is computed by means of three-dimensional (3D) finite-element (FE) analyses, thus allowing the investigation of the relationship between performance and some simple geometrical parameters, such as the spacing among the piles. The results of centrifuge tests are reported and used as a benchmark. The potential damage has been quantified in this work, taking into account both the settlement profile and the horizontal strain induced at the ground surface by tunneling. It is shown that although the settlement reduction is significant only for very small spacing (s = 2–3 pile diameters), even largely spaced piles (s = 5–6 pile diameters) are useful to prevent damage to buildings because of the significant reduction of the average horizontal strain. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i3/p254_s1?isAuthorized=no [article] Use of a line of piles to prevent damages induced by tunnel excavation [texte imprimé] / Emilio Bilotta, Auteur ; Gianpiero Russo, Auteur . - 2011 . - pp. 254-262. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 3 (Mars 2011) . - pp. 254-262 Mots-clés : Tunnels  Piles  Excavation  Settlement  Damage  Protective  structures Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : Buildings founded in proximity to shallow tunnels under construction may be damaged by the ground displacements induced by tunneling. This is a matter of concern for design, and a variety of protective interventions are currently adopted to prevent such damages. Among these, rows of piles or jet-grouting columns are widely diffused. In this paper, the effectiveness of a simple row of piles is computed by means of three-dimensional (3D) finite-element (FE) analyses, thus allowing the investigation of the relationship between performance and some simple geometrical parameters, such as the spacing among the piles. The results of centrifuge tests are reported and used as a benchmark. The potential damage has been quantified in this work, taking into account both the settlement profile and the horizontal strain induced at the ground surface by tunneling. It is shown that although the settlement reduction is significant only for very small spacing (s = 2–3 pile diameters), even largely spaced piles (s = 5–6 pile diameters) are useful to prevent damage to buildings because of the significant reduction of the average horizontal strain. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i3/p254_s1?isAuthorized=no