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Class A prediction of the behavior of soft estuarine soil foundation stabilized by short vertical drains beneath a rail track / Buddhima Indraratna in Journal of geotechnical and geoenvironmental engineering, Vol. 136 N° 5 (Mai 2010) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 5 (Mai 2010) . - pp. 686-696 Titre : Class A prediction of the behavior of soft estuarine soil foundation stabilized by short vertical drains beneath a rail track Type de document : texte imprimé Auteurs : Buddhima Indraratna, Auteur ; Cholachat Rujikiatkamjorn, Auteur ; Brook Ewers, Auteur Année de publication : 2010 Article en page(s) : pp. 686-696 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Clays  Cyclic  loads  Laboratory  tests  Railroad  engineering  Subsurface  drainage Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : In Australia, very few rail tracks have been constructed directly on deep estuarine deposits. In recent years, Kooragang Island has become a major export terminal and most coal trains need to cross the main lines at Sandgate to enter Kooragang Island. In this study, a rail track built on up to 30 m of thick soft estuarine soil was stabilized with relatively short vertical drains to consolidate the soil just beneath the track, and no additional preloading surcharge was provided, except the weight from the trains. The initial soil compression was caused by the passage of trains with a speed restricted at 40 km/h. From this study, it is shown that prefabricated vertical drains significantly decrease the buildup of excess pore-water pressure during cyclic loading, and also continue to dissipate excess pore-water pressure during the rest period. A preliminary finite-element analysis was employed to examine the performance of vertical drains, and a Class A prediction was obtained in terms of lateral and vertical displacements. The monitored settlement and lateral displacement results are presented and discussed. The study shows that relatively short vertical drains are sufficient for providing stability for rail tracks, without the need for driving deep vertical drains through the entire soft soil depth. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v136/i5/p686_s1?isAuthorized=no [article] Class A prediction of the behavior of soft estuarine soil foundation stabilized by short vertical drains beneath a rail track [texte imprimé] / Buddhima Indraratna, Auteur ; Cholachat Rujikiatkamjorn, Auteur ; Brook Ewers, Auteur . - 2010 . - pp. 686-696. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 5 (Mai 2010) . - pp. 686-696 Mots-clés : Clays  Cyclic  loads  Laboratory  tests  Railroad  engineering  Subsurface  drainage Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : In Australia, very few rail tracks have been constructed directly on deep estuarine deposits. In recent years, Kooragang Island has become a major export terminal and most coal trains need to cross the main lines at Sandgate to enter Kooragang Island. In this study, a rail track built on up to 30 m of thick soft estuarine soil was stabilized with relatively short vertical drains to consolidate the soil just beneath the track, and no additional preloading surcharge was provided, except the weight from the trains. The initial soil compression was caused by the passage of trains with a speed restricted at 40 km/h. From this study, it is shown that prefabricated vertical drains significantly decrease the buildup of excess pore-water pressure during cyclic loading, and also continue to dissipate excess pore-water pressure during the rest period. A preliminary finite-element analysis was employed to examine the performance of vertical drains, and a Class A prediction was obtained in terms of lateral and vertical displacements. The monitored settlement and lateral displacement results are presented and discussed. The study shows that relatively short vertical drains are sufficient for providing stability for rail tracks, without the need for driving deep vertical drains through the entire soft soil depth. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v136/i5/p686_s1?isAuthorized=no