Centrifuge investigations of normal and reverse fault interaction with jack-up rig spudcan foundations

Katy Oakes; Michael Brown; Jonathan Knappett; Ioannis Anastasopoulos

Centrifuge investigations of normal and reverse fault interaction with jack-up rig spudcan foundations

Katy Oakes (Lead / Corresponding author), Michael Brown, Jonathan Knappett, Ioannis Anastasopoulos

Civil Engineering

Research output: Contribution to conference › Paper

Abstract

This paper introduces the methodology for a series of centrifuge model tests which investigated the interaction between geological faults, in sand and a jack-up rig with spudcan foundations. Understanding the fault rupture-soil-foundation-structure interaction (FR-SFSI) is critical when attempting to develop platform design and risk mitigation strategies. The findings may be used alongside other hazard risk mitigation strategies deployed during site investigations and assessments of rig operations. Results show how a reverse fault propagates though the soil and directly intercepts the spudcan foundations. The jack-up causes fault diversion and bifurcation yet still suffers from significant rotations at the hull and large axial forces in the legs. This research forms part of a wider study which includes finite-element analyses (FEA) of the jack-up-fault interaction. The centrifuge results will be used to validate and further calibrate the numerical analyses.

Original language	English
Number of pages	12
Publication status	Published - 12 Sep 2019
Event	International Conference: The Jack-up Rig - City University, London, United Kingdom Duration: 12 Sep 2019 → 13 Sep 2019

Conference

Conference	International Conference: The Jack-up Rig
Country	United Kingdom
City	London
Period	12/09/19 → 13/09/19

Keywords

Faulting
Jackup rig
spudcan

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Research Output

1 Conference contribution

Numerical Modelling of Jack-Up Rig Spudcan Interaction with Normal Faults

Oakes, K., Brown, M. & Anastasopoulos, I., 12 Sep 2017, Offshore Site Investigation and Geotechnics: Smarter Solutions for Future Offshore Developments: Proceedings of the 8th International Conference, held 12–14 September 2017 at the Royal Geographical Society, London. Society for Underwater Technology, Vol. 1-2. p. 1026-1033

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Cite this

Oakes, K., Brown, M., Knappett, J., & Anastasopoulos, I. (2019). Centrifuge investigations of normal and reverse fault interaction with jack-up rig spudcan foundations. Paper presented at International Conference: The Jack-up Rig, London, United Kingdom.

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title = "Centrifuge investigations of normal and reverse fault interaction with jack-up rig spudcan foundations",

abstract = "This paper introduces the methodology for a series of centrifuge model tests which investigated the interaction between geological faults, in sand and a jack-up rig with spudcan foundations. Understanding the fault rupture-soil-foundation-structure interaction (FR-SFSI) is critical when attempting to develop platform design and risk mitigation strategies. The findings may be used alongside other hazard risk mitigation strategies deployed during site investigations and assessments of rig operations. Results show how a reverse fault propagates though the soil and directly intercepts the spudcan foundations. The jack-up causes fault diversion and bifurcation yet still suffers from significant rotations at the hull and large axial forces in the legs. This research forms part of a wider study which includes finite-element analyses (FEA) of the jack-up-fault interaction. The centrifuge results will be used to validate and further calibrate the numerical analyses.",

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AU - Oakes, Katy

AU - Brown, Michael

AU - Knappett, Jonathan

AU - Anastasopoulos, Ioannis

PY - 2019/9/12

Y1 - 2019/9/12

N2 - This paper introduces the methodology for a series of centrifuge model tests which investigated the interaction between geological faults, in sand and a jack-up rig with spudcan foundations. Understanding the fault rupture-soil-foundation-structure interaction (FR-SFSI) is critical when attempting to develop platform design and risk mitigation strategies. The findings may be used alongside other hazard risk mitigation strategies deployed during site investigations and assessments of rig operations. Results show how a reverse fault propagates though the soil and directly intercepts the spudcan foundations. The jack-up causes fault diversion and bifurcation yet still suffers from significant rotations at the hull and large axial forces in the legs. This research forms part of a wider study which includes finite-element analyses (FEA) of the jack-up-fault interaction. The centrifuge results will be used to validate and further calibrate the numerical analyses.

AB - This paper introduces the methodology for a series of centrifuge model tests which investigated the interaction between geological faults, in sand and a jack-up rig with spudcan foundations. Understanding the fault rupture-soil-foundation-structure interaction (FR-SFSI) is critical when attempting to develop platform design and risk mitigation strategies. The findings may be used alongside other hazard risk mitigation strategies deployed during site investigations and assessments of rig operations. Results show how a reverse fault propagates though the soil and directly intercepts the spudcan foundations. The jack-up causes fault diversion and bifurcation yet still suffers from significant rotations at the hull and large axial forces in the legs. This research forms part of a wider study which includes finite-element analyses (FEA) of the jack-up-fault interaction. The centrifuge results will be used to validate and further calibrate the numerical analyses.

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Y2 - 12 September 2019 through 13 September 2019

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