Field tests on pile-supported embankments over soft ground / R. P. Chen in Journal of geotechnical and geoenvironmental engineering, Vol. 136 N° 6 (Juin 2010)  

Public ISBD [article]  inJournal of geotechnical and geoenvironmental engineering > Vol. 136 N° 6 (Juin 2010) . - pp. 777-785 Titre : Field tests on pile-supported embankments over soft ground Type de document : texte imprimé Auteurs : R. P. Chen, Auteur ; Z. Z. Xu, Auteur ; Y. M. Chen, Auteur Année de publication : 2010 Article en page(s) : pp. 777-785 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Pile-supported embankment Field test Earth pressure Settlement Case studies Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : When designing embankments over soft soils, geotechnical engineers face many challenges. These include potential bearing failure, intolerable settlement, and global or local instability. Pile-supported embankments have been emerged as an effective alternative successfully adopted worldwide to solve these problems. This paper focuses on three cases in which pile-supported embankments were used for constructing highways in the eastern coastal region of China. Each case provides a description of the soil profile, construction procedure, and field monitoring of the settlements, earth pressures, and pore-water pressures. Field monitored data from contact pressures acting on the piles and the soils, to the settlements of the piles and the soils are reported and discussed. The development of the earth pressures both on the piles and the soils shows that there was a significant soil arching in the embankment, and the measured earth pressures acting on the piles are much higher than that acting on the soils between the piles. The measured differential settlements between the piles and the soils are small. The pore-water pressures are not significant compared to the embankment loads. Most pore-water pressure dissipated after the complete of filling. The measurements have proven the effectiveness of this technique in reducing total and differential settlements. Finally, the available design standards and approaches are verified by three cases. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v136/i6/p777_s1?isAuthorized=no [article] Field tests on pile-supported embankments over soft ground [texte imprimé] / R. P. Chen, Auteur ; Z. Z. Xu, Auteur ; Y. M. Chen, Auteur . - 2010 . - pp. 777-785. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 6 (Juin 2010) . - pp. 777-785 Mots-clés : Pile-supported embankment Field test Earth pressure Settlement Case studies Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : When designing embankments over soft soils, geotechnical engineers face many challenges. These include potential bearing failure, intolerable settlement, and global or local instability. Pile-supported embankments have been emerged as an effective alternative successfully adopted worldwide to solve these problems. This paper focuses on three cases in which pile-supported embankments were used for constructing highways in the eastern coastal region of China. Each case provides a description of the soil profile, construction procedure, and field monitoring of the settlements, earth pressures, and pore-water pressures. Field monitored data from contact pressures acting on the piles and the soils, to the settlements of the piles and the soils are reported and discussed. The development of the earth pressures both on the piles and the soils shows that there was a significant soil arching in the embankment, and the measured earth pressures acting on the piles are much higher than that acting on the soils between the piles. The measured differential settlements between the piles and the soils are small. The pore-water pressures are not significant compared to the embankment loads. Most pore-water pressure dissipated after the complete of filling. The measurements have proven the effectiveness of this technique in reducing total and differential settlements. Finally, the available design standards and approaches are verified by three cases. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v136/i6/p777_s1?isAuthorized=no

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