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

Research output: Contribution to conferencePaper

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 languageEnglish
Number of pages12
Publication statusPublished - 12 Sep 2019
EventInternational Conference: The Jack-up Rig - City University, London, United Kingdom
Duration: 12 Sep 201913 Sep 2019

Conference

ConferenceInternational Conference: The Jack-up Rig
CountryUnited Kingdom
CityLondon
Period12/09/1913/09/19

Fingerprint

reverse fault
centrifuge
normal fault
mitigation
site investigation
bifurcation
hull
model test
rupture
soil
hazard
sand
methodology

Keywords

  • Faulting
  • Jackup rig
  • spudcan

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.
Oakes, Katy ; Brown, Michael ; Knappett, Jonathan ; Anastasopoulos, Ioannis. / 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.12 p.
@conference{7254f92854bc47289de425f9ae399d1e,
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.",
keywords = "Faulting, Jackup rig, spudcan",
author = "Katy Oakes and Michael Brown and Jonathan Knappett and Ioannis Anastasopoulos",
year = "2019",
month = "9",
day = "12",
language = "English",
note = "International Conference: The Jack-up Rig ; Conference date: 12-09-2019 Through 13-09-2019",

}

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, 12/09/19 - 13/09/19, .

Centrifuge investigations of normal and reverse fault interaction with jack-up rig spudcan foundations. / Oakes, Katy (Lead / Corresponding author); Brown, Michael; Knappett, Jonathan; Anastasopoulos, Ioannis.

2019. Paper presented at International Conference: The Jack-up Rig, London, United Kingdom.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Centrifuge investigations of normal and reverse fault interaction with jack-up rig spudcan foundations

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.

KW - Faulting

KW - Jackup rig

KW - spudcan

M3 - Paper

ER -

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