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Re-assessment of pile driveability predictions on sites offshore Nigeria

Meyer, V. (ed.), Frontiers in Offshore Geotechnics III: proceedings of the Third International Symposium on Frontiers in Offshore Geotechnics (ISFOG 2015), Oslo, Norway, 10-12 June 2015, CRC Press, Boca Raton, pp. 649-654.

10 Jun 2015
Vignerot, B., Wallerand, R., Maron, M. and Colliard, D.
DOI: 10.1201/b18442-86

Driven foundation piles are commonly used to support offshore platforms in the conventional oilfield developments. It is evidenced that the pile drive ability predictions need some improvement to enhance the installation feasibility.Typical behavior of driven piles into dense sand and normally consolidated clays offshore Nigeria comprises high friction degradation in sands and clays and set-up effect after driving interruptions. Such dynamic effects of driving on the soil resistance need further investigations as the methodologies available in the technical domain fail at capturing them.Widely varying site conditions on the Niger delta with numerous installed platforms provide excellent case studies. Pile driving phenomena were studied through installation measurements, back analysis of driving records and computing pile driving monitoring records.This paper provides a comparison with some existing methods calibrated in the Gulf of Guinea. The soil conditions considered led to review the pile plugging behavior and address some recommendations for future pile driving predictions.


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