Predicting the foundation performance of offshore jack-up drilling rigs in intermediate soils

Raffaele Ragni

Predicting the foundation performance of offshore jack-up drilling rigs in intermediate soils

Raffaele Ragni

Research output: Thesis › Doctoral Thesis

508 Downloads (Pure)

Abstract

The performance of spudcan foundations for jack-up platforms in intermediate soils is evaluated with a combination of experimental and numerical techniques. Given the possibility for these foundations to experience variable periods of load hold, attention is drawn to the effects of consolidation on spudcan installation and subsequently its combined capacity under multi-directional loading. The implementation of a hypoplastic constitutive model for structured clays underpins the numerical analyses, with outcomes validated by an extensive geotechnical centrifuge testing campaign. The results reveal a general increase in the spudcan mono and multi-directional capacity, due to strengthening and stiffening of the soil.

Original language	English
Qualification	Doctor of Philosophy
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Bienen, Britta, Supervisor Cassidy, Mark, Supervisor Wang, Dong, Supervisor
Award date	8 Mar 2017
Publication status	Unpublished - 2016

Access to Document

THESIS - DOCTOR OF PHILOSOPHY - RAGNI, Raffaele - 2016
This work is protected by Copyright. You may print or download ONE copy of this document for the purpose of your own non-commercial research or study. Any other use requires permission from the copyright owner. The Copyright Act requires you to attribute any copyright works you quote or paraphrase.

Cite this

@phdthesis{4fdbc2bf7bdb41858f435de95b133e5e,

title = "Predicting the foundation performance of offshore jack-up drilling rigs in intermediate soils",

abstract = "The performance of spudcan foundations for jack-up platforms in intermediate soils is evaluated with a combination of experimental and numerical techniques. Given the possibility for these foundations to experience variable periods of load hold, attention is drawn to the effects of consolidation on spudcan installation and subsequently its combined capacity under multi-directional loading. The implementation of a hypoplastic constitutive model for structured clays underpins the numerical analyses, with outcomes validated by an extensive geotechnical centrifuge testing campaign. The results reveal a general increase in the spudcan mono and multi-directional capacity, due to strengthening and stiffening of the soil.",

keywords = "Spudcan, Consolidation, Intermediate soils, centrifuge, Numerical modelling, Hypoplasticity, Jack-up, Clay",

author = "Raffaele Ragni",

year = "2016",

language = "English",

school = "The University of Western Australia",

}

TY - BOOK

T1 - Predicting the foundation performance of offshore jack-up drilling rigs in intermediate soils

AU - Ragni, Raffaele

PY - 2016

Y1 - 2016

N2 - The performance of spudcan foundations for jack-up platforms in intermediate soils is evaluated with a combination of experimental and numerical techniques. Given the possibility for these foundations to experience variable periods of load hold, attention is drawn to the effects of consolidation on spudcan installation and subsequently its combined capacity under multi-directional loading. The implementation of a hypoplastic constitutive model for structured clays underpins the numerical analyses, with outcomes validated by an extensive geotechnical centrifuge testing campaign. The results reveal a general increase in the spudcan mono and multi-directional capacity, due to strengthening and stiffening of the soil.

AB - The performance of spudcan foundations for jack-up platforms in intermediate soils is evaluated with a combination of experimental and numerical techniques. Given the possibility for these foundations to experience variable periods of load hold, attention is drawn to the effects of consolidation on spudcan installation and subsequently its combined capacity under multi-directional loading. The implementation of a hypoplastic constitutive model for structured clays underpins the numerical analyses, with outcomes validated by an extensive geotechnical centrifuge testing campaign. The results reveal a general increase in the spudcan mono and multi-directional capacity, due to strengthening and stiffening of the soil.

KW - Spudcan

KW - Consolidation

KW - Intermediate soils

KW - centrifuge

KW - Numerical modelling

KW - Hypoplasticity

KW - Jack-up

KW - Clay

M3 - Doctoral Thesis

ER -

Predicting the foundation performance of offshore jack-up drilling rigs in intermediate soils

Abstract

Access to Document

Fingerprint

Cite this