28 SeptemberMillenium Hilton Seoul

Yunsup Shin, Per SparrevikNorwegian Geotechnical Institute (NGI)

Offshore wind foundations design,

installation and monitoringInnovation DayClean Energy Seminar, Innovation Norway

Houston - 2002

Oslo (HQ) - 1953

Trondheim - 2005

Kuala Lumpur – 2009

(JV with G & P)

Perth - 2014

NGI - Private independent foundation

• Established 1953

• R&D and consultancy work

• National and international clients

• Cooperation with universities and research institutes

Key figures

• No. of employees = 250 worldwide

• Around 35 nationalities

• Turnover = 430 million NOK 6 % from Norwegian Research Council

• About 1/3 Offshore Energy

Paris - 2015

History - projects

1950 - 70Subway and railway through Oslo centerQuick clay and slidesDams and power generation facilitiesDevelopment of DSS

1970 - 80Oil and gas adventure in NorwayEstablish and develop snow avalanche centre at StrynefjelletDevelopment of the Q-method

1980 - 90Develop geo-environmental technologyGullfaks C platformTragic snow avalanche in Vassdalen

History – projects

1990-00Environmental work at Hærøya New OSL Gardermoen airportSnorre and Troll A platformsSuction anchor technologyLærdal road tunnel – world’s longest

2000-10Ormen Lange - StoreggaEM technology - EMGSTsunami researchUnder water deposit in Oslo harbour

2010-nowLarge developments in offshore windReliability based design

Geohazard site investigation, offshore Newfoundland

Offshore windfarm, Maryland

Geohazard study, Gulf of Mexico

Geohazard Study, Brazil

Jetty and breakwater design, Uruguay

Anchor Design, Australia

Windfarm R&D study, Korea

Jackup Assessments, Qatar

EQ and pipeline design, Azerbaijan

Nearshore SI and design, RussiaIntegrated ground model, Barents Sea

Numerous windfarms, North Sea

Offshore client support, India

Geohazard study, East Africa

Selected NGI projects worldwide – last 12 months

Gas Hydrates, Black Sea

Pile and anchor design, Norwegian Sector

Anchor trenching studies, West AfricaManifold Design, Indonesia

Suction pile design, Egypt

Exploration Field planningProject

development

Installation

OperationLife extensionDecomissioning

Drilling hazardsGeophysicsJack-ups

Geohazard evaluationIntegrated geomodelSite investigationsPipeline routing

Foundation designPipelines and subseaAnchoringSeismic design

Suction anchorsPiled foundationsPipelinesInstrumentationTrenching

Operational monitoringShallow gasConductor/riser performance

Foundation assessmentPerformance increaseMooring integrityReliability based design

RemovalRe-use

Offshore project life cycleNGI services

Part 1

Part 2

Part 1:

Offshore wind foundations design

Monopile foundation

GBS foundation

Bucket foundation/anchor

Jacket foundation

Others

Offshore foundation – Monopile foundation

NGI – optimising monopile design

Track record of projects for major operators, including London Array, Anholt, Dudgeon

Refined and efficient 3DFEA to calibrate analytical models

Reliable modelling of cyclic response in sand, clay and chalk

Large scale field testing of monopile installation and lateral response

Monopiles – NGI experience

Generally governing for overall dimensions and weight

Offshore foundation – GBS foundation

GBS – NGI experience

• First Offshore CPT in 1972 with NGI

16 concrete platforms

• Soil Investigation• Lab testing• Soil properties• Foundation design• Instrumentation

Ekofisk tank Dolwin 2 GBS

Troll A

Offshore foundation – Suction caisson

Timeline for evolution of suction anchors

2000

1500

1000

500

Wate

r de

pth

(m)

Perm

ane

nt S

uctio

nan

ch

ors

insta

lled

Year

200

400

600

800

1000

1985 1990 1995 2000 2005

Floaters and subseaFixed platforms

25000

1980 2010

DianaGoM

Northwestgateway

Hanze/Ardmore

MarlimSemi/FPSO

Trent

Gullfaks CPenetration

testSnorre

TLPTroll GBS platform

Draupnerjacket

Offshore

wind?

Njord/Visund

N'Kossa

AquilaFPSO

ÅsgardA &B

Girassol

Horn mountain

Nakita GOM

Bonga

Thunderhorse

Suction caisson – NGI experience

Pull-out (or push-in) failure

Calculated Measured

Snorre model tests Jackets, tripods and monopods: • Efficient foundation design• Low-noise installation• Track record in oil and gas sector

(Sleipner, Draupner..)• First installation for offshore wind

turbine(Borkum Riffgrund) designed by NGI

Suction anchorsHywind Scotland

Proven offshore anchoring technology –

pioneered by NGI and Statoil in the 1990s

NGI performed FEED and detailed suction

anchor design as well as advanced

laboratory testing

Installation in 2017

30+ years of experience, competence and quality

Offshore piles for jackets: • Full geotechnical design for

concept, FEED and detailed design

• 3D FEA modelling of piles and pile groups to capture foundation performance

• Reliability-based design to improve understanding of risk

Jacket foundation – NGI experience

Site investigation

NGI – a reliable partner from the first day of your project

Fully integrated and comprehensive project teams in geotechnics, geology and geophysics

Leading the way with R&D application in projects

Geohazard site assessment─ Hazard mapping─ Integration of geophysics, geotechnics,

geology─ Slope stability and debris flows─ Pipeline route optimisation─ Drilling hazard assessments

Seismic response and EQ design─ Probabilistic seismic hazard assessment─ Site response analyses─ Dynamic soil-structure interaction─ Liquefaction

Marine Geohazards and earthquakes

Advanced laboratory testing

High quality and capacity: • Triaxial testing (CAU, K0, small strain)• Direct simple shear (DSS)• Oedometer (IL and CRS)• Cyclic testing• Resonant column• Ring shear• Schmertmann Research Laboratory

NGI – market’s broadest and most flexible array of analysis solutions for optimal design

NGI’s «DNA» = fundamental understanding of soil behaviour, including cyclic response

Always «fit for purpose», everything from hand calculations to advanced 3D FEA with non-linear soil models

Unique combination of optimised soil models and efficient analysis to provide accurate and good value

Analysis solutions