Consistent preload calculations for jackup spudcan penetration in clays
- 1 May 2008
- journal article
- Published by Canadian Science Publishing in Canadian Geotechnical Journal
- Vol. 45 (5), 705-714
- https://doi.org/10.1139/t07-108
Abstract
Onshore bearing capacity methods have conventionally been used to predict the penetration of offshore jackup spudcans into the seabed. However, the Brinch Hansen depth factor has a step change in value at the point at which the lateral dimension of a footing equals its embedment. For soft clay seabeds, where penetrations can be greater than the spudcan diameter, the step produces a spurious, unrealistic prediction of punchthrough. A small modification is proposed to the depth factor to avoid this. Some consistent modifications are proposed for several related calculations.Keywords
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