Static Load Tests on Two 16-Pile Groups in Mekong Delta

Hai Nguyen

In the proceedings of: GeoVancouver 2016: 69th Canadian Geotechnical Conference

Session: FOUNDATION DESIGN - II Driven Piles

ABSTRACT: Static load test program was performed on a single pile and two 16-pile groups with the similar and different pile lengths. The soil profile consists of sand fill to 0.5 m depth placed on a thick deposit of soft, normally consolidated, compressible clay. The closed end steel pipe piles in 60 mm diameter were installed into 1.5 m through 2.1 m depth within soft clay. The center-to-center distance of piles in group is about 3 times of pile diameter. The strain gages were installed at one level above and two through four levels below ground surface. The tests were carried out about 7 days after driving by method of a series of load increments placed every 5-minutes until plunging failure occurred. The load at plunging failure for the single pile, the equal-length pile group and the different-length pile group were about 3 kN, 40 kN and 48 kN, respectively. The movements at start of failure were about 12, 18, and 17 mm, respectively. The analysis of strain gage measurements indicates that the load distribution on piles in the different-length pile group has become significantly more uniform.

RÉSUMÉ: semblables et différentes longueurs dans le delta du Mékong, Vietnam. Le profil du sol est constitué de sable de remplim placé sur de dépôt de l'argile molle compressible normalement consolidée. Les pieux de tuyaux en acier de diamètre 60 mm étaient installés dans la profondeur de 1,5 m à 2,1 m sous la surface du sol. La distance de centre à centre des pieux dans le groupe est environ de trois fois du diamètre des pieux. Une jauge de contrainte est installée au dessus de la surface du sol et deux à quatre jauges sont installées au dessous. Les essais étaient exécutés après 7 jours de conduite par la méthode de série d'incréments de charge pour chaque 5 ieu isolé, pieux en groupe de longueur égale et différente étaient environ de 3 kN, 40 kN et 48 kN, respectivement. Les mm, respectivement. L'analyse des measures de jauge de contrainte indique que la répartition de charges sur les pieux dans les groupes de différent longueurs est nettement plus uniforme que celles de longueur égale.

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Cite this article:
Hai Nguyen (2016) Static Load Tests on Two 16-Pile Groups in Mekong Delta in GEO2016. Ottawa, Ontario: Canadian Geotechnical Society.

@article{3678_0716030218,author = Hai Nguyen,title = Static Load Tests on Two 16-Pile Groups in Mekong Delta,year = 2016}