Case history: continuous flight auger (cfa) piling at coastal region in the island of Madagascar

Tatsuo Iryo, Hafeez Baba, Farbod Saadat, Edward Kolakowski

In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical Engineering

Session: Deep Foundations

ABSTRACT: Continuous Flight Auger (CFA) pile foundations were used to support a major new nickel mine process plant located at the east coast of the island of Madagascar in the Indian Ocean. The site is situated on a relatively level coastal strip with near surface soils in the area generally comprised of alluvial and dune deposited fine to medium grained sands. The site experiences frequent cyclones and high winds resulting in significant design lateral and uplift loads. Over six thousand piles, 16 m long, were constructed in 21 months from September 2007 to May 2009. Static pile load tests were conducted prior to and during pile construction to ensure that the required pile capacities were achieved. This paper presents the outline of the pile construction, quality control and quality assurance (QA/QC) measures employed during installation and outcomes of the pile load testing program.

RÉSUMÉ: Des fondations sur pieux forés à la tarière continue ont été utilisées pour supporter la nouvelle usine principale de nickel située sur la cote est de l™ile de Madagascar dans l™Océan Indien. Le site est situé sur la cote relativement plat avec des sols de surface composés généralement de dépôts alluviaux et des dunes de sables fins à moyens. Le site reçoit fréquemment des cyclones et de forts vents créant de forces latérales et de d™arrachement très élevées. Plus de 6,000 pieux de 16 m de long ont été construits en 21 mois, de Septembre 2007 à Mai 2009. Des essais de chargement statiques ont été conduits avant et pendant la construction pour assurer que les capacités des pieux ont été atteintes. Cet article présente la construction des pieux et les divers moyens de contrôle et d™assurance de qualité qui ont été employés pendant l™installation des pieux et les résultats du programme d™essais de chargement.

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Cite this article:
Tatsuo Iryo; Hafeez Baba; Farbod Saadat; Edward Kolakowski (2011) Case history: continuous flight auger (cfa) piling at coastal region in the island of Madagascar in GEO2011. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GEO11Paper959,author = Tatsuo Iryo; Hafeez Baba; Farbod Saadat; Edward Kolakowski ,title = Case history: continuous flight auger (cfa) piling at coastal region in the island of Madagascar ,year = 2011}