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The mechanism of steady friction between seabed pipelines and clay soils / D. J. White in Géotechnique, Vol. 61 N° 12 (Décembre 2011) 

Public ISBD [article]  in Géotechnique > Vol. 61 N° 12 (Décembre 2011) . - pp. 1035–1041 Titre : The mechanism of steady friction between seabed pipelines and clay soils Type de document : texte imprimé Auteurs : D. J. White, Auteur ; H. R. C. Dingle, Auteur Année de publication : 2012 Article en page(s) : pp. 1035–1041 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Failure  Theoretical  analysis  Offshore  engineering  Pipelines  Clays  Centrifuge  modelling Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The large-amplitude lateral soil resistance between an on-bottom pipeline and the seabed is an important design parameter in assessing pipeline behaviour during lateral thermal buckling or under the impact of a submarine slide. This paper describes a series of centrifuge model tests that shed light on the underlying behaviour during large-amplitude lateral pipe movement. It is shown that at large displacements the lateral response is governed predominantly by the passive resistance of the growing berm of soil ahead of the pipe. Using a new analysis of this growing soil berm, based on conservation of volume, the ‘local' embedment of the pipe relative to the top of the idealised soil berm is defined. In this way, the normalised lateral pipe–soil resistance, H/s u D, from tests encompassing a range of pipe weights and initial embedments follows a single trend line. This idealisation of the response is more consistent than the usual terminology of a pipe–soil friction factor. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.8.t.036 [article] The mechanism of steady friction between seabed pipelines and clay soils [texte imprimé] / D. J. White, Auteur ; H. R. C. Dingle, Auteur . - 2012 . - pp. 1035–1041. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 61 N° 12 (Décembre 2011) . - pp. 1035–1041 Mots-clés : Failure  Theoretical  analysis  Offshore  engineering  Pipelines  Clays  Centrifuge  modelling Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The large-amplitude lateral soil resistance between an on-bottom pipeline and the seabed is an important design parameter in assessing pipeline behaviour during lateral thermal buckling or under the impact of a submarine slide. This paper describes a series of centrifuge model tests that shed light on the underlying behaviour during large-amplitude lateral pipe movement. It is shown that at large displacements the lateral response is governed predominantly by the passive resistance of the growing berm of soil ahead of the pipe. Using a new analysis of this growing soil berm, based on conservation of volume, the ‘local' embedment of the pipe relative to the top of the idealised soil berm is defined. In this way, the normalised lateral pipe–soil resistance, H/s u D, from tests encompassing a range of pipe weights and initial embedments follows a single trend line. This idealisation of the response is more consistent than the usual terminology of a pipe–soil friction factor. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.8.t.036