DRIVEN AND SUCTION ANCHOR PILES FOR TWO DEEPWATER FPSO MOORINGS

摘要

The 5m-diameter driven anchor piles of Site U FPSO platform in 750m of water off Nigeria are currently thernlargest piles ever driven at a deepwater site. The use of driven piles was dictated by the soil conditions, withrndense sand units interbedded within soft clays and into which suction piles could not penetrate. In the samernarea, suction piles were used for the Site K FPSO in 1300m of water, thus allowing a relevant comparison ofrnthe two anchor pile options. For both cases, the paper provides a summary of the general site characteristicsrnand design methodology, together with comparison of the installation results to predictions.