This paper presents results of a laboratory testing program employing a reduced-scaled model of a three-legged jack-up to investigate the influence of an adjacent footprint on spudcan installation. This study focused on the installation of the full jack-up with a single leg located adjacent to a surface discontinuity. This contrasts previous studies that focused on the behavior of a single leg model and aims to account for the coupled interaction of the three legs and hull. The investigation was conducted using a 1:200 model scale jack-up designed to represent an average commonly used field jack-up. It was fully instrumented for leg bending and axial force measurement, and allowed unconstrained horizontal motion and rotation in the plane of foundation-footprint offset. Installation was performed at foundation-footprint centerline offsets of 0.75, 0.89, and 1.0 times the footprint diameter in overconsolidated kaolin clay adjacent to three different footprint types. The three footprint types — spudcan generated, a similarly shaped vertical walled auger generated, and shallow slope — were used to analyze separately the effect of shape and soil disturbance.
- Ocean, Offshore and Arctic Engineering Division
Jack-Up Installation on an Uneven Seabed: Recommendations From Model Testing in Overconsolidated Clay
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Landon, MM, Gaudin, C, & Cassidy, MJ. "Jack-Up Installation on an Uneven Seabed: Recommendations From Model Testing in Overconsolidated Clay." Proceedings of the ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. Volume 7: Offshore Geotechnics; Petroleum Technology. Honolulu, Hawaii, USA. May 31–June 5, 2009. pp. 329-338. ASME. https://doi.org/10.1115/OMAE2009-79934
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