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NTNUGeoteknikk
studentprosjektforslag
NTNUGeotech'sstudentprojectproposals
18-08-2015
Categories:
Geotechnicaldesign
Numericalanalyses
Marinegeotechnicalengineering
Fieldandlabinvestigations
Landslides
Arctictechnology
Geotechnicaldesign:
1.INFOOMGEOTEKNISKEFIRMAER
Keywords:
geotechnicaldesign
Description:
DETTEERIKKEENPROSJEKTOPPGAVE-MENETTIPSTILÅFINNEAKTØRER
INNENGEOTEKNIKK
Hvorfinnerjegenoversiktovernorskefirmaer?
GåtilNorskgeotekniskforeningogsepåfanenOMNGF->Støttemedlemmersåfårduen
oversiktoverfirmamedlemmene.
Mangeavdisseharstudenterpåsommerjobbogsamarbeidermedossomprosjekter.
Takontaktdersomduharnoenideerellerkontakter.
Detonesteoppgaveneavtypen"Dittegetprosjektforslag"erlagetforatduskalkunne
registrereetprosjektavdennetypen.
Geotechnicaldesign:
Dittegetprosjektforslag-generellgeoteknikk
Exampleprojectsfromconsultingengineers-general
Keywords:
geotechnicaldesignslopesfillsgeohazardsriskevaluation
Description:
Detteeretgenereltprosjektsomeretablertforatstudentersomharegneprosjektideer,feks
etterkontaktmedfirmaeriløpetavstudietiden(sommerjobb,deltidsarbeid),kanfremme
dissesomstudentprosjektogkanskjeogsåformastertilvåren.
Hergjelderdetegentligalleprosjektersomgrensermotstabilitetavskråninger,fyllinger,
utgravinger,støttemurer,elveforbygninger,grunnforsterkning,fundamentering,
grunnundersøkelser...kortsagtaltenkankommebortisområdgiverigeotekniske
spørsmål.
Omduharhattellerskalhasommerjobbhosgeotekniskrådgiver,hosenentreprenøreller
hosbyggherre,omdeterurbantellerlandlig,ilavlandetellerifjellet,pålandelleri
sjø/vann/fjordsåvildetkunneværerelevanteproblemstillingeråstudere.
Tameddegdineideerforenpratmedoss.
Thisgeneralprojectismeantforstudentswhohavebeenincontactwiththeindustry
duringsummerinternship(summerjobs)andtakeninterestinspecialtopics.The
projects/cases/measureddatacanbebroughtfordiscussionwiththedepartmentstafftosee
iftheyaresuitableforprojectsormasterthesis.Thesecanbee.g.settlementsandstability
offillsonsoftsoils,landslidestudies,riskanalyses,designofprotectivemeasuresetc.
Predictionscomparedtomeasurementsarealwaysofspecialinterest.
Severalstudentspossible.
Collaborations:
Consultingcompanies.Statensvegvesen/Jernbaneverket,NorgesGeotekniskeInstitutt
Contact:
Aman.ArnfinnEmdal,[email protected]
Prof.SteinarNordal,[email protected]
Geotechnicaldesign:
Dittegetprosjektforslag-samvirkejord-konstruksjon
Exampleprojectsfromconsultingengineers-soilstructureinteraction
Finiteelementmethod(FEM)
Keywords:
geotechnicaldesignfemsoilstructureinteraction
Description:
Detteeretgenereltprosjektsomeretablertforatstudentersomharegneprosjektideer,feks
etterkontaktmedfirmaeriløpetavstudietiden(sommerjobb,deltidsarbeid),kanfremme
dissesomstudentprosjektogkanskjeogsåformastertilvåren.
Hergjelderdetsamvirkeanalyseprosjekterbasertpåelementmetoden,feksABAQUS,
PLAXIS,GeoSuiteellerandrerelevanteverktøy.Modelleringavkonstruksjonogjordi
samvirkeskillersegfradeklassiskehåndregnemetodermedgrenselikevektfor
skråningsstabilitet,spuntanalyser,peleretc.vedatstivhetavalleelementerkommerinn,
oganalysendermedblirmerrealistisk.
PLAXIS
GEOSUITE
Thestiffnessofastructuralelementandthesoilinwhichitisinstalledisacomplex
combinationthatrequiresanalyseswithnumericalmethodslikee.g.finiteelements.In
geotechnicalengineeringthisiscommonlyusedinbridgeandbuildingfoundations,either
directoronpilegroups,supportstructureslikesheetpilewallsforexcavatedlargebuilding
pits,anchors,buriedculverts,quays,windturbinefoundations,oilplatforms/seabed
structuresetc.Studentswhoareincontactwiththeindustrymaybringproposals/cases/data
todiscussifthesearesuitedaspossiblestudentprojectsormasterthesistopics.
Severalstudentspossible.
Collaborations:
Consultingcompanies,Statensvegvesen/Jernbaneverket,Norgesgeotekniskeinstitutt,
SINTEF
Contact:
Aman.ArnfinnEmdal,[email protected]
Prof.SteinarNordal,[email protected]
Prof.GustavGrimstad,[email protected]
ProfIIHansPetterJostad,[email protected]
Geotechnicaldesign:
E39Fergefrittvestland
Brukavfjellankereikombinasjonmedgravitasjonsfundamentforbruerpåstorevanndyp
TheuseofrockanchorstogetherwithatraditionalGBSfoundationforbridgesatlargewaterdepths
Keywords:
geotechnicaldesign,bridgeanchors
Description:
E39Statensvegvesensinformasjonssider
HererenvideofraStatensvegvesensomillustrerer:Video
IprosjektetferjefriE39erhengebrueitaktueltalternativforfjordkryssing.Fordenne
brutypenvildetverebehovforopptakavstorekrefterfråhengebrukabelene.Desse
kreftenekantakastoppvedåinstallerestoregravitasjonsfundament.Einmetodeforå
reduserevektatilfundamentaerbrukavforspenteankerifjell.
Aktuelleoppgaverer:
1.Studieavinteraksjonmellomfjellankeroggravitasjonsfundamentmedfokuspå
vurderingavforskyvingnødvendigformobiliseringavankerkapasitetogfriksjonmellom
fundamentogundergrunn
2.Oppførselavfjellankerunderjordskjelvlast
SuspensionbridgesareoneoftheoptionsconsideredintheprojectFerry-freeE39.Forthis
typeofbridgelargeforcesfromthesuspensioncablesneedtobeanchored.Theseforces
canbetakenbytheuseoflargegravityfoundations.Onemethodtoreducetherequired
loadistousepre-stressedrockanchors.
Projecttasksare:
1.TostudytheinteractionbetweentherockanchorsandaGBSfoundationwithfocuson
thedisplacementsrequiredformobilizationofrockanchorcapacityandvs.baseslab
frictionmobilization
2.Therockanchorbehaviorduringearthquakeloading
Collaborations:
StatensVegvesenE39-fergefrittvestland
Contact:
ProfGudmundEiksund,[email protected]
PhD-studentJoarTistel,[email protected]
Geotechnicaldesign:
Geodynamikk-Jordskjelv
GeodynamicsorEarthquakeengineeringrelatedproblems
Keywords:
geotechnicaldesigngeodynamicsearthquake
Description:
Problemsrelatedtobasictheory,designtoolsorcalculationproceduresforGeotechnical
EarthquakedesigninNorwayorabroad.
Problemsrelatedtogeodynamicsincludetrafficevibrations,blasting,piledriving,
foundationsforvibratingmachinery.
Thishasalsoaconnectiontothelaboratoryprojectswithbenderelementandcrosshole
fieldtesting.
Collaborations:
NorwegianGeotechnicalInstitute,NGI
Contact:
[email protected]
[email protected]
ProfIIAmirM.Kaynia,[email protected]
Geotechnicaldesign:
Vibroinstallasjonavpelar
Installationofpilesusingvibration
Keywords:
geotechnicaldesignpiles
Description:
ForeslåttesøkeordforYoutubefordettetemaet:Vibroinstallationofpiles
ProposedYoutubesearchkeywords:
Installasjonavpelermedtungtrammeutstyrgenererarstøyogvibrasjonar.Vibrasjonarkan
giskaderpåbygg.Isambandmedpeleramingtilhavskanstøykanvereskadelegfor
dyrelivogdåsærskiltforsjøpattedyr.Alternativeinstallsjonsmetodersomvibreringer
diforaktuelt.Eithinderforåtaibrukdennemetodereratmetodenefor
kapasitetsberegningerbasertpåerfaringartradisjonellinstallasjonmedbrukav
pelehammer.Prosjektoppgavavilvereeitliteraturstudieavvibroinstallasjonavpelarog
metoderforkapasitetsbereging.
Installationofpilesbytheuseofheavypilingrigsgeneratesbothnoiseandvibrations.The
vibrationsmayresultindamagesonbuildingswhilethenoiseisdisturbing.Foroffshore
pilingthevibrationsisusuallyaminorproblemwhilethenoise(soundwavesinwater)
maybeamajorconcernandpossiblydamagingtowildlifeandseamammalsinparticular.
Alternativeinstallationmethodsmaythereforeberequired.Oneobstaclefortheuseofthe
vibrationtechniqueisthattheexistingdesignmethodsarebasedfromexperiencedriven
piles.Theprojectwillconsistofaliteraturestudyonvibrioinstallationofpilesand
methodsforcalculatingpilecapacities.
Contact:
[email protected]
Numericalanalyses:
Benderelement-modelleringavtreakstestiABAQUSellerPLAXIS
ModelingofbenderelementtestinABAQUSorPLAXIS
Keywords:
numericalanalyses
Description:
Benderelementmontertitoppogbunntriakprøverblirbruktforåmåle
forplantingshastighetforskjærogtrykkbølger.Tolkningavresultateneerbasertpåantatt
bølgeforplantingsmønsterfrasenderogmottakerelement.Måleresultateneblirbrukttilå
beregneskjærmodulforsmåtøyningsnivå(G-max).Oppgavengårutpååmodellere
triaksapperatureninkludertjord,vannitriakscellaplexiglassylinder,toppogbunnstykketi
ABAQUSellerPLAXIS.Formåleteråstuderebølgeforplantingforåundersøkeantatt
bølgeforplantingstemmermedantagelsene.
Benderelementsmountedinthetopandbottomofsoilsamplesinatriaxialapparatuscan
beusedtomeasureshearandcompressionwavevelocities.Theinterpretationisbasedon
assumedstresswavepropagationpatternsbetweenthetransmitterandreceiverelement.The
measurementresultsisusedtoderivesmallstrainshearstiffness(Gmax).Theprojecttask
willbetomodelthetriaxialapparatusincludingsoil,waterinthecell,theplexiglass
cylinderantthetopandbottomplatesinABAQUS.Thepurposeistostudythestresswave
propagationandcheckiftheassumptionsintheinterpretationsisreasonable.
Contact:
Prof.GudmundEiksund,[email protected]
Numericalanalyses:
Creepinclay(modeldevelopment)
Krypileire(modelutvikling
Keywords:
numericalanalyses,literaturestudy,programming
Description:
Recentlytherehasbeendevelopmentincreepmodelsforclay.Advancedcreepmodels
nowtakeintoaccount,inadditiontocreep,anisotropyanddestructuration.However,not
muchisdoneonsmallstrainbehaviorinregardstocreepmodels.Inthisprojectthe
candidatewilllookatdifferentoptionsonhowtoincludesmallstrainbehaviorincreep
models(Literaturereview).
Thecandidateshouldalsoinvestigatethepotentialeffectofincludingsmallstrain
behavioronmodelperformance.Thisprojectwillpreparethecandidateforfurtherworkon
constitutivemodellingofcreepinclayintheMScthesis.Theprojectisrelatedtothe
researchprojectGeoFuture.
Collaborations:
NorwegianGeotechnicalInstitute
Contact:
Prof.GustavGrimstad,[email protected]
PhD-studentJonA.Rønningen,[email protected]
PhD-studentMohammadAshrafi,
Numericalanalyses:
Creepinwarmfrozensoils-numericalsimulation
Krypifrossenjord-numeriskeberegninger
Keywords:
numericalanalyses,literaturestudy,programming
Description:
Simulationofcreepinwarmfrozensoil(temperature-1°Cto-5°C),shouldbecarriedoutbyuseofanewlydeveloped
soilmodel.Theresultsshallbecomparedtoobservationsandlaboratorytestresults,e.g.simulationoffrostheave.
Saturatedfrozensoilsareconsideredasamixtureofsoilgrains,iceandunfrozenwater.Themechanicalbehaviorof
frozensoilsisstronglyaffectedbytheamountofice,andtheamountoficedependsontemperatureandapplied
mechanicalstresses.Thiscoupledbehavioristhemaincharacteristicbywhichfrozensoilsbehavedifferently
comparedtounfrozensamples.Moreover,duetoviscousbehaviorofice,timedependentbehaviorshouldbetaken
intoaccount.Bydividingthetotalstressintofluidpressureandsolidphasestress,inadditiontoconsideringthe
cryogenicsuctionasanindependentstress-statevariable,anelastic-viscoplasticmodelforsaturatedfrozensoilsis
proposedintheframeworkofover-stressmethod.Theproposedmodelisabletorepresentmanyfundamentalfeatures
offrozensoilssuchasfrostheaveandstrengthweakeningduetopressuremelting.
ThisprojectislinkedtotheEUprojectCREEPofgeomaterialsandSAMCOTWorkPackage6.
CREEPofgeomaterialsSAMCoT
Collaborations:
EUCreepprojectSAMCoT
Contact:
Prof.GustavGrimstad,[email protected]
Prof.SteinarNordal,[email protected]
Post.Doc.Dr.S.A.GhoreishianAmiri,[email protected]
Phd-student:MehdiKhadivar,[email protected]
Numericalanalyses:
Cyclicbehaviorofclays(strainaccumulation)
Sykliskoppførselavleire
Keywords:
numericalanalyses
Description:
Totalstressmodelscapableofcalculatingcyclicresponseofclayshouldbestudiedusing
FiniteElementAnalysisonboundaryvalueproblemsrelevantforoffshorefoundations,for
e.g.offshoreOWTstructures.
Theprojectwilltestanewlydevelopedconstitutivemodel(calculationprocedure)thatis
developedforcalculatingaccumulatedpermanentstrainsinthematerialduetocyclic
loadingwithagivennumbercycles.Themodeldoesnotcalculatetheresponseofeach
cycle,buttheeffectofthecyclichistoryonaccumulateddeformationsinthesoil(tiltofa
monopilestructureorsettlementofaGBS).Themodelisalsocapableofcalculatingthe
undrainedcycliccapacityofthesoilduringstormloading.
Collaborations:
Contact:
Prof.GustavGrimstad,[email protected]
Numericalanalyses:
GEOFUTURE-Effectivestressbasedsoilmodelforsoftclay
Effektivspenningsbasertjordmodellformykleire
Keywords:
numericalanalysessoilmodelimplementation
Description:
Skandinaviskeleirerkreveravansertejordmodellerforåkunnebeskriveutviklingavstyrke
ogstivhetovertøyningogtid.SomendelavGeoFutureprosjektetharenkonstitutiv
modellformykSkandinaviskeleireblittutvikletvedNTNU.
Modellentarmedeffektersomanisotropi,kryp/tøyningshastighetsavhengighetogeffekt
avstruktur(destrukturering/restrukturering).Denerformulertinnenforrammeneavelasto/
visco-plastisitetogfokusererpåsetningogprediksjonavudrenertskjærstyrke.
A.SimuleringiPLAXIS
Entypiskelementmetode(FE)-modellbeståravmangeelementerderdenkonstitutive
jordmodellengirsammenhengmellomspenningerogtøyningerihvertavelementenes
gausspunkter.Inputparameteretilmodelleneroftebasertpålaboratorietesteravprøver
hentetfrajordensommodelleresoginoentilfellerogsåbasertpåempiriskedataog
erfaring.Detbørunderstrekesatanvendelsenavenmodellerdelvismåltvedsinevnetilå
passelaboratorieprøvekurver,menmeriåforutsioppførselenavspenningsstiersomikkeer
desammesomdesombenyttesideninnledendekalibreringen.Hovedmåletmeddenne
studienerålageFEmodellerogutføresimuleringeriPLAXISforuliketilfellerhvormålte
dataertilgjengelig,ogsåsammenligneresultateneforåfinneuthvorgodtformuleringene
passer.
Detkanværebådesetningogbæreevneproblemer.
B.Utviklingogimplementeringavmodeller
Jordmodellerbasertpåplastisitetsteorikanutviklesavstudentenisamarbeidmedveileder
ogimplementeresidatakode.Etnumerisk"rammeverk"(MATLAB/Fortran)kananvendes
somgjørdetenklereåimplementerekodeniPLAXIS.
LinktilPLAXISsinnettside
English:
SoftScandinavianclaysrequireadvancedanisotropicsoilmodelstoaccuratelypredict
strengthandstiffnessduringshorttermandlongtermloading.AspartoftheGeoFuture
projectaconstitutivemodelforsoftScandinavianclaysisbeingdevelopedatNTNU.
Themodelincludesfeaturessuchasanisotropy,creep/ratedependenceandtheeffectsof
structure.Itisbasedontheframeworkofelasto/visco-plasticityandthefocusisbothon
settlementsandthepredictionoftheundrainedshearstrength.
A.PLAXISsimulations
AtypicalFiniteElement(F.E.)modelconsistsofmanyelementswheretheconstitutivesoil
model(s)workwithineachelement'sgausspointstosupplytherelationbetweenstresses
andstrains.Mostoftenthesoilmodelinputparametersarebasedonlabtestsofspecimens
extractedfromthegroundwhichistobemodeled,andinsomecasesalsobasedon
empiricaldataandexperience.
Itshouldbeemphasizedthattheapplicabilityofamodelisinpartmeasuredbyitsability
tofitlabtestcurves,butmoresoinpredictingbehaviorfromstresspathswhicharenotthe
sameasthoseusedintheinitialcalibration.Themainobjectiveofthisstudyistocreate
F.E.modelsandperformsimulationsinPLAXISforvariousrealtestcaseswheremeasured
dataareavailablewhichmakesitpossibletodeterminehowwellconstitutivemodels
work.
Itcouldbebothsettlementandbearingcapacityproblems.
B.Developmentandimplementationofmodels
Soilmodelsbasedonplasticitytheorycanbedevelopedbythestudentincollaboration
withthesupervisorandimplementedintocomputercode.Anumerical"framework"
(MATLAB/Fortran)maybeused,whichmakesiteasiertoimplementthecodeinto
PLAXIS.
LinktoPLAXISwebsite
Collaborations:
GEOFUTUREisamultipartnerresearchproject.Seegeofuture.nofordetails.
Contact:
JonA.Rønningen,Ph.D.stud.NTNU,[email protected]
[email protected]
GustavGrimstad,[email protected]
Numericalanalyses:
Isogeometricfiniteelementanalysisofelasticconsolidation
Keywords:
numericalanalyses
Description:
Semesterprojectinthefall:(sebelowforMasterprojectdescription)
ThisprojectworkrevisitstheclassicalBiotsconsolidationproblemfromadifferent
perspective.Thegoverningmassbalanceandequilibriumequationsareimplementedinan
isogeometricanalysissettingusinglocallymassconservingsmoothB-splinebasis
functions.Thestudentwillworkonthesimulationofvariouselasticconsolidation
problems.Thefocusoftheproblemstobesimulatedwillbeonthecausesofporepressure
oscillationsandtheaccuracyofthecomputedsolutionforverysmalltimesteps.The
advantagesofamixedformulationfordisplacementandporepressure,i.edifferent
polynomialorders,overanequalorderofinterpolationwillbeinvestigated.The
simulationresultswillbecomparedwithanalyticalsolutions,wheneveravailable.The
problemstobestudiedwillincludesingleandmultiplelayeredsoils,especiallywithvery
smallhydraulicconductivityproperties.
Requirements:BasicknowledgeofC++programminglanguage,Abilitytowork(learnto
work)onaLinuxenvironment,Abilitytowork(learntowork)withsimulation
visualizationtoolssuchasParaview/GLviewInova,Knowledgeofascriptinglanguagelike
Pythonisanadvantage.
Objectives:Besidesworkingonareasthatmaybeimprovedwithregardstothenumerical
simulationofconsolidationproblems,thestudentwillhaveanopportunitytolearnmore
andhaveabetterunderstandingoftheblackboxbehindfiniteelementpackages.
MasterThesis
Title:Onisogeometricfiniteelementanalysisofelastoplasticconsolidation
Description:Thestudentwillworkonextendinganexistingisogeometricfiniteelement
implementationofelasticconsolidationforelastoplasticmaterials.Theelastoplasticmodel
(Drucker-PragerorModifiedCamClaymodel)tobeimplementedwillbeselected
appropriately.Thefirststepintheworkwillbeimplementingtheselectedmodeland
verifyingtheimplementationwithbenchmarkproblems.Thenextstepwillbestudyingthe
useofhigherorderB-splinebasisfunctionsforelastoplasticconsolidationandassessing
theadvantagesoverLagrangepolynomialbasedstandardfiniteelementsimulations.Asin
thecaseofelasticconsolidation,pressureoscillationsandcomputedsolutionaccuraciesfor
verysmalltimestepswillbeinvestigated.Thesimulationproblemstobestudiedwill
includesingleandmultiplelayeredsoils,especiallywithverysmallhydraulic
conductivityproperties.
Requirements:GoodknowledgeofC++programminglanguage,Abilitytowork(learnto
work)onaLinuxenvironment,Abilitytowork(learntowork)withsimulation
visualizationtoolssuchasParaview/GLviewInova,Knowledgeofascriptinglanguagelike
Pythonisaplus
Objectives:Besidesworkingonareasthatmaybeimprovedwithregardstothenumerical
simulationofconsolidationproblems,thestudentwillhaveanopportunitytolearnmore
andhaveabetterunderstandingoftheblackboxbehindfiniteelementpackages.
Contact:
[email protected]
[email protected]
Numericalanalyses:
Probabilisticinterpretationofsoildataforpiledesign
Keywords:
numericalanalyses,fem,p-ymodel,cpt,geostatistics,montecarlo,randomfieldtheory,
matlab
Description:
ThestudywillincludegeostatisticalanalysisofCPTtestresultsinordertodetectpoint
andspatialvariabilityofsoilproperties.Obtainedsoilcharacteristicswillbeusedasinput
parametersbymeansofrandomfieldinthenumericalpile-soilmodel.Theprobabilistic
analysiswillbeconductedwithintheMonteCarloframeworktodetecttheuncertainties
relatedtothedeterministicapproachandsensitivityofthepile-soilmodeltothesoil
variability.
Contact:
Prof.GudmundEiksund,[email protected]
Numericalanalyses:
Thermomechanicalmodeling(www.ntnu.edu/samcot)
Keywords:
numericalanalysesarctictechnology
Description:
TestingofdifferentprogramsforTMHmodeling.
A.Reviewandunderstandingofthetheoreticalformulationsinvolvedinthemodeling
ofT(H)Mcoupledproblemsingeomechanics
B.Selectionofgeotechnicalapplicationareaswherebenchmarkdatacanbeavailable,
suchasnuclearwastedisposal,energypiles,geothermalenergyorgroundfreezing
C.Numericalstudyofselectedproblemsinafiniteelementsoftwarepackage;
comparisonoftheresultsagainsteachotherandbenchmarkdata
Studyandcomparisonofsequential(iterative)andfullycoupledsolutionmethodsfor
selectedapplicationproblems
LINKTOSAMCotresearchproject
Collaborations:
SAMCOTresearchproject
Contact:
[email protected]
[email protected]
Marinegeotechnicalengineering:
Offshoresoil-structureinteraction-Dampingandstiffnessofsandorerosionprotectiondependent
ongrainsizeandloadingrateinconnectionwithmonopilesforwindturbines
Keywords:
marinegeotechnicalengineering
Description:
DampingandstiffnessofsandorerosionprotectiondependEntongrainsizeandloading
rateinconnectionwithmonopilesforwindturbines
Collaborations:
DetNorskeVeritasGL
Contact:
Prof.GudmundEiksund,[email protected]
LivHamre,DNV-GL([email protected])
Marinegeotechnicalengineering:
Penetrasjonavstålskjørtileire-Steelskirtpenetrationinclay
Keywords:
marinegeotechnicalengineering
Description:
Statoilharidesiste20årbruktfundamentersombl.a.beståravstålskjørtsompenetreresi
leire.Detteblirsværtoftebruktforfundamenterforundervannskonstruksjoner.Deter
utfordrendeåbestemmepenetrasjonsmostandenforslikeskjørttilstrekkelignøyaktig.Det
harværtgjennomførtenoppsummeringaverfaringmedinstallasjonavslikefundamenter
inntil2007,menarbeidetterdentiderikkeanalysert.Arbeidetvilomfattesystematisering
avobservertpenetrasjonsmotstandmotberegnetmotstand,sammenlignedetteogevaluere
metoderformernøyaktigbestemmelseavskjørtefriksjon.Statoilhasoverthelast20years
usedfoundationswithsteelskirtspenetratinginclayasanimportantpartofe.g.subsea
structurefoundationdesign.Thepenetrationresistancealongsuchskirtsischallengingto
calculateaccurately.Asummaryofworkuptill2007havebeenreported,butexperience
from2008needtobeanalysed.Theworkwillcontainpresentingpenetrationresistance
frominstallationsandcomparewithestimatesandevaluatemoreaccurateestimatesfor
penetrationresistance
Collaborations:
Statoil
Contact:
Prof.GudmundEiksund,[email protected]
GisleHåland([email protected]),Phone:48147518
Marinegeotechnicalengineering:
Radialconsolidationofporepressureinducedbypileinstallation
Keywords:
marinegeotechnicalengineering,pileskinfrictionsetupeffect,consolidation,soil
parameters
Description:
Pileloadtestsshowthattheshaftfrictionstronglydependentontheover-consolidation
ratio
(OCR)andtheplasticityindex(IP)fortheclay.Thephysicalexplanationforthese
relationsisnotfullyunderstood.Partoftheexplanationmaybedifferencesin
unloading/reloadingstiffnessduringdissipationoftheexcessporepressureinducedbythe
piledriving.
ThetaskwillbetoanalysetheporepressuredissipationprocessusingPLAXIS.The
analysiswillbeperformedwithsoilparametersfornormalandoverconsolidatedclaywith
bothlowandhighplasticity.
Contact:
Prof.GudmundEiksund,[email protected]
Fieldandlabinvestigations:
Benderelementmålingitriaks-celle(Dynamiskstivhet)
Keywords:
fieldandlabinvestigations,soildynamics
Description:
Målingavdynamiskstivhetvedbølgeforplantninggjennomtreaksprøver.Vurderingav
konsolideringsforholdogprøveforstyrrelse.Muligsammenligningmedfeltforsøk.
Contact:
Aman.ArnfinnEmdal,[email protected]
Prof.SteinarNordal,[email protected]
Fieldandlabinvestigations:
CPT(ConePenetrationTesting)AstudyofthevibrationsthatoccurintheCPT-systemduring
penetrationindensesiltysediments
Keywords:
fieldandlabinvestigations
Description:
Duringpenetration(2cmprsec)oftheCPTUindensesoilswithhighfrictionastick-slip
behaviormayoccurgivingvibrationsinthesystem.Itistheintentionintheprojectto
installadynamicgaugeintheCPT–tipandrecordthevibrations.Theprojectwillbe
suitableforastudentwithinterestintheoreticalandpracticalissues,including
instrumentationandfieldmeasurement.
Contact:
[email protected]
PhD-studentAnnikaBihs
Fieldandlabinvestigations:
Effektavtemperaturpåmåltelab-data
Keywords:
fieldandlabinvestigations
Description:
NGIharetpågåendeprosjektisamarbeidmedindustrienforåsepåeffektenavtemperatur
pådeparameternemanmåleristandardisertelaboratorieforsøk,somtriaks-og
ødometerforsøk.Prosjektoppgave:Gjennomgåproblemstillingenogtilgjengeligedata.
Hovedoppgave:BrukeNGIsellerNTNUsnyeklimarom.Kjøreparallelleforsøkved
forskjelligetemperaturer,foreksempelpåmaterialersomerdokumentertpåtidligere.
Collaborations:
NGI
Contact:
NTNU:ArnfinnEmdal
NGI:TomLunne,[email protected],T:22023054,M:90029267,
MortenSjursen,[email protected],T:22023066,M:47600553
Fieldandlabinvestigations:
Effektivbrukav2D-resistivitetsammenmedgeotekniskegrunnundersøkelser
Effectiveuseof2Dresistivityingeotechnicalsiteinvestigations
Keywords:
fieldandlabinvestigations
Description:
Geofysiskemetodersommålingavjordasresistivitetharfåttøkendepopularitetsom
supplementtilgeotekniskegrunnundersøkelserdesisteårene.Spesieltgjelderdettefor
prosjektersominvolvererkvikkleire,iogmedatdeterensterksammenhengmellom
resistivitetogsaltinnholdijorda.2D-resistivitetkangietkontinuerligbildeavpotensielle
kvikkleireforekomsterlangsetprofil.
Usikkerhetereroftestknyttettiljordartstolkningfraresistivitetsmålingerogdetmåutføres
geotekniskesonderingerogprøvetakingforsikkerverifiseringogforåetablere
designparametere.Styrkeniåkombineresonderingermed2D-resistivitetsprofilerliggeriat
manfåretgrunnlagforåvurderehvasomermellomsonderingspunkteneoghvordanlagene
liggerfordelt.Vedriktigkombinasjonliggerdetheretpotensialtilåredusereantall
sonderinger,mensamtidigfålikemyeellermerinformasjonomgrunnforholdene.
Prosjektoppgavenskalsepåhvordanenoptimaltkankombinere2D-resistivitetsmålingerog
geotekniskesonderingeroptimalt.Spørsmålmankankommeinnpåer:nåriprosessenmed
grunnundersøkelseneskal/børmanutføre2D-resistivitetsmålinger,hvoroghvordanskal
manleggeprofilene,hvordanskalmanleggeopptilkoblingmellomulikeprofilerog
koblingmotR-CPTU,hvordanskalmanleggegeotekniskesonderingeriforholdtilprofiler
ogikkeminst,hvordanskaldataenebestpresenteresforgjøretolkningmestmuligenkelog
effektiv?
Deterfleremuligheterforvinklingavoppgaven,noesomviltilpassesdenenkeltes
interesser.Oppgavenvildelvistautgangspunkti,ogsamarbeidemed,etpågåendeprosjekti
regiavSVV,NVEogJBV(NIFS)påtemaetdetekteringavsprøbruddsmaterialerhvorbruk
av2D-resistiviteteretavtemaene.
Englishtext
Geophysicalmethods,likemeasurementofthesoilresistivity,havebecomeincreasingly
popularthelateryearsasasupplementtoageotechnicalsiteinvestigation.Thisappliesin
particularforprojectsinvolvingquickclay.Thereisastrongcorrelationbetweenresistivity
andsaltcontent.Aslowsaltcontentindicatessensitiveclay,2Dresistivityprofilescanthen
giveacontinuousimageofpotentialquickclaydeposits.
Therearestilluncertaintiesrelatedtosoilclassificationfromresistivitymeasurementsand
conventionalgeotechnicalinvestigations,likesoundingsandsampling,mustbeperformed
forverificationandforestablishmentofdesignparameters.Thestrengthofcombining
soundingswithresistivityprofilesisthatoneobtainsabasisfordeterminingwhatisinbetweenthesoundings.Bydoingthiscombinationcorrectlythereisapotentialforreducing
thenumberofsoundings,butstillobtainequalamountsormoreinformationoftheground
conditionsasonedoeswithasetupwithout2D-resistivity.
Itisthisaspectthisprojectwillfocuson:Howtocombine2D-resistivitymeasurementsand
geotechnicalsoundingsinanoptimalmanner?Questionsraisedare:whenshouldone
performresistivitymeasurements,howandwhereshouldtheprofilesbeplaced,howshould
oneconnectprofilesandR-CPTU-soundings,howtoplacesoundingsandhowtopresent
thedata?
Theprojectcanbeshapedaccordingtotheinterestsofthestudent.Theprojectwillfurther
berelatedtoongoingworkonthetopicofquickclaydetection(NIFSbySVV,NVEand
JBV)andworkatNGU.
Collaborations:
Multiconsult,NorgesGeologiskeUndersøkelser,NIFS(Naturfare,Infrastruktur,Flomog
Skred)se
www.naturfare.no
Contact:
Aman.ArnfinnEmdal,[email protected]
Multiconsultv/RolfSandven,[email protected]
NGUv/IngerLiseSolberg,[email protected]
AndersGylland,[email protected]
Fieldandlabinvestigations:
Prøveforstyrrelseravjordprøver-3prosjekter
Sampledisturbanceofsoilsamples-3projects
Keywords:
fieldandlabinvestigations
Description:
Prøveforstyrrelser(englishtextatbottomofpage)
Problematikkenrelaterttilprøveforstyrrelserharblittgittmyeoppmerksomhetdesiste
årene.Laboratorieundersøkelseravuforstyrredeprøveravgodkvalitetkangipålitelige
konsoliderings-ogstyrkeegenskaperforbrukidesignavgeotekniskekonstruksjoner.En
nøyaktigkarakteristikkavfin-kornedejordprøverkreverenprøvetakingsomikke
introdusererforstyrrelser,samtforsiktighåndteringavmaterialet.Detteerenvanskelig
oppgavepågrunnavpraktiskebegrensingerknyttettilprøvetaking,transportmetoder,
lagringoghåndtering.
Følgendelenkevisereteksempelpåblokkprøvetaking:
https://www.dropbox.com/s/ke1yyp8s8v6xukn/2014-05-22%2008.25.09.mp4?dl=0
Prosjekt1.Avlastningunderogetterprøvetaking
Svellingavjordprøverskjeritidsperiodenmellomprøvetakingifeltogtestingi
laboratoriet.Underogetterprøvetakingenreduseresdeeffektivespenningene,slikatkun
enlitenbrøkdelgjenstår,sammenlignetmedenprøveunderinsitu-forhold.Effektenav
avlastningpåkvikkleireervistifigur1.Denneeffektenerspesieltframtredendei
blokkprøver,grunnetmangelpåsideveisstøtte.
Måletfordenneoppgaveneråundersøkeavlastningunderogetterprøvetaking.
·Prosjektetinkludereretstørrelitteraturstudie
·Determuligheterforpassendelaboratorie-og/ellerfeltarbeid
Figur1Spenning-tøyningskurverfratreaksialforsøkpåEllingsrudkvikkleire(Bjerrum,
1954)
Prosjekt2:Poretrykksvariasjonunderogetterprøvetaking
Avlastningenunderprøvetakingenkompenseresavetnegativtporetrykk,ellersug,innei
prøven.Dettesugetvariereravhengigavforstyrrelsesgradunderprøvetakingsprosessen,så
velsominsituspenningstilstand,porestørrelse,deformasjonsegenskapene,transportog
forberedelseavprøvene.
Måletfordenneoppgaveneråundersøkeporetrykkvariasjonenunderogetterprøvetaking
·Prosjektetinkludereretstørrelitteraturstudie
· Determuligheterforpassendelaboratorie-og/ellerfeltarbeid
Prosjekt3:Simuleringavprøvetakingoglaboratorietestingmedelementmetoden
Prøveutskyvingintroduserermekanisketøyningerogavlastningavtotalspenninger.Figur
2illustrererpotensiellekildertilprøveforstyrrelserviaenhypotetiskspenningsstiunder
åpningenavensylinderprøveforlaboratorietesting.Blokkprøvererimindregradutsattfor
mekaniskeforstyrrelsersammenlignetmedsylinderprøver,menoppleverraskere
avlastning.
Figur2Hypotetiskspenningsstiunderåpningenavensylinderprøveforlaboratorietesting
(LaddandDeGroot,2003)
Referanser
Bjerrum,L.(1954).GeotechnicalPropertiesofNorwegianMarine
Clays.Géotechnique4:49-69.
Ladd,C.C.andD.J.DeGroot2003.Recommendedpracticefor
softgroundsitecharacterization:ArthurCasagrandeLecture.Proc.
ofthe12thPanAmericanConf.onSoilMechanicsand
GeotechnicalEngineering.MIT,Cambridge,Massachusetts.
Projectproposal:Sampledisturbance
Theissuesrelatedtoassessmentofsampledisturbancehavebeengivenmuchattentionfor
manyyears.Laboratorytestsonundisturbedsamplesofgoodqualitycanprovidereliable
consolidationandstrengthpropertiesfordesignofgeotechnicalstructures.Areliable
characterizationoffine-grainedsoilsamplesdemandsanundisturbedsamplingfollowed
bycarefulhandlingofthematerial.However,thisisnotastraightforwardtaskbecauseof
thepracticalconstraintsassociatedwiththesamplingtechniques,transportationmethods,
storageandhandlingprocedures.
Project1.“Stressreliefduringandaftersampling”
Theeffectofswellingofthesoilsampleoccursinthetimeperiodbetweenwhenthe
sampleiscutinthefieldandwhenitisreadyfortestinginthelaboratory.Duringandafter
samplingtheeffectivestressesinthesamplereduce,suchthatonlyasmallfractionremains
ascomparedtoasampleunderinsituconditions.Theeffectofstressreliefonquickclayis
showninFigure1.Theeffectofstressreliefisparticularlyprominentinblocksamples,due
tolackoflateralsupport.
Objectives
Theobjectiveofthisworkistoexaminestressreliefduringandaftersampling.
·Theprojectinvolvesanextensiveliteraturestudy
]·Possibilityforsuitablelaboratoryand/orfieldwork
Project2:“Porepressurevariationduringandaftersampling”
Theremovaloftotalstressesduringthesamplingiscompensatedbynegativeporepressure
orsuctionwithinthesampleintheirunconfinedstate.Thissuctionmayvarydependingon
thedegreeofdisturbanceinducedduringthesamplingprocess,insitustressstate,pore
size,andsoilcompressibilitycharacteristics,aswellasotherfactorssuchasdrillingand
samplingprocedures,transportation,andsamplepreparation.Figure2illustratespotential
sourcesofsampledisturbanceviaahypotheticalstresspathduringtheprocessofobtaining
atubesampleforlaboratorytesting.
Objectives
Theobjectiveofthisworkistoexaminetheporepressurevariationduringandafter
sampling.
·Theprojectinvolvesanextensiveliteraturestudy
·Possibilityforsuitablelaboratoryand/orfieldwork
Project3:“Simulationofsamplingandlaboratorytestingwithfiniteelementmethod
(FEM)”
Sampleextractionintroducesmechanicalstrainsandtotalstressrelease,which,inturnlead
toachangeinporewaterpressure.Thisisillustratedinfigure2,whichshowspotential
sourcesofsampledisturbanceviaahypotheticalstresspathoftheentiresampling
procedureforatubesampleofalightlyoverconsolidatedclay.Blocksamplesexperience
lessmechanicaldisturbancethantubesamples,butmorerapidstressrelief.
Thepurposeofthisstudyistosimulatesamplingandlaboratorytestingusingafinite
elementprogramPLAXIS.
·Theprojectinvolvesanextensiveliteraturestudy
·FEMsimulations
Collaborations:
Statensvegvesen
Contact:
[email protected]
[email protected]
[email protected]
Landslides:
Bremsevirkningavtrærvedsnøskred
Keywords:
landslidessnowavalanches
Description:
Enproblemstillingsomhardukketoppmange,mangegangerutenengodløsninger
bremsevirkningensomskogmedgitttetthetharpåskred,ogomvendthvorstoreskaderi
skogensommåforventesavetskredmedgittstørrelse.Særligdetførstespørsmåleteroftest
knyttettilsnøskredsimuleringermedenellerannennumeriskmodell.Erdetnødvendigå
forandremodelleneforåkunnesimulereeffektenavskogen,ellerholderdetmedå
modifiserefriksjonsparametrene?Dersomdetertilfelle,hvormyeendrersegdisse
parametreneiavhengighetavantalltrærperflateenhetoggjennomsnittligtrediameter?
Hvistrærneharstoravstandfrahverandre,kanmanfinnesvaretframotstandenavetenkelt
treogantalltrærperflateenhet,mendetteharlitenpraktiskbetydning.Hvisskogenstår
tett,påvirkerforstyrrelsenavstrømningenfraettreogsåstrømningenrundtnabotrærneog
effektenkanikkeberegnespåenenkelmåte.Detfinnesnoenfåpublikasjonerom
snøskrediskog,bl.a.(Takeuchi,Y.etal.,AnnalsGlaciol.52(58),2011).Førstetrinni
prosjektetkunneværeetgrundiglitteratursøkogkontaktermedinstitutteneiAlpene,
RusslandogJapan,eventueltAmerikaforåseomdeharupublisertedatasomkanbrukes
tiletterregningero.l.Menjegtrorikkedetholdermeddette.Jegforeslårenkle
laboratorieeksperimenterpåenglidebanemedetfinkornetmateriale,omtrentimålestokk
1:50–1:200.Skogensimuleresforeksempelmedspikreavforskjelligtykkelseogdistanse
somkansettesinnoverenvisslengdeidenenehalvpartenavglidebanenmensdenandre
sidaikkefårskogforåkunnesammenligneskredutenogmedskog.Fronthastighetenog
flytehøydenmålesmedhjelpavvideoopptaknormalttilglidebanenogfrasidene(det
skulleknaptholdemednormaltvideoutstyr).Modellskredmedogutenskogetterregnes
medforskjelligemodeller.Itilleggkanenergitapetellerkraftenutøvetavetenkelttre
beregnesomtrentligdersommanfinnerenpassendedefinisjonavReynolds-talletfor
granulæreogviskoplastiskemedier.Detfinnesnoentankeromdetteilitteraturen,ogArash
Zakeri(tidligeredoktorgradstudentpåICG)fantinteressantesammenhengerforleireisine
forsøkiMinneapolis.Detskulledaværemuligåkommetilrelativtpåliteligeresultater
selvvedoppskaleringtilnaturligesnøskred.Iandredelenavprosjektetkanmanbruke
disseeksperimentelleresultateneforåtilpasseparametreneavenellernoenfåutvalgte
dynamiskemodeller.HovedkandidatererPCM-modellen,sombrukesofteiNorgeog
Amerika,ogmodelleravVoellmy-typen.ForPCM-ellerNIS-modellenharviogså
mulighettilåforandremodellenselv,foreksempelgjennomennymotstandsterm.
Forrestenerdetogsåavinteresseåsehvordandenstatistiskealfa-beta-modellenreagerer
påskog.
Collaborations:
Norgegeotekniskeinstitutt
Contact:
ArnfinnEmdal,NTNU
DieterIssler,[email protected]
Landslides:
E39–Hvordantaretflomskredoppmasserfraunderlaget
Entrainmentofbedsedimentsbydebrisflow
Keywords:
landslides,geohazards,flowslide
Description:
Videoer:
VideofraNTNUGeoteknisklab(Dennevideoenvisereteksperimentderensuspensjoner
sattibevegelseogdemålestrykkisiderogpåbunnenavbeholderen.Delavet
masterarbeidvåren2015)
VideofraIllgraben(Determangevideoeromdettetemaet;debrisflow,mudflow,
flowslide,landslidekanværeaktuellesøkeord)
Thefinalmagnitudeofdebrisflowisoftenmuchlargerthevolumeoftheinitiating
landslide.Itisoftenthecasethattheinitialinglandslideisrathersmall.Whereas,thebulk
ofthedebrisinvolvedintheactualdebrisfloweventareresultsfromentrainmentof
materialalongtherun-outpath.Therefore,ourabilitytodetermineentrainmentisan
essentialaspectofanaccurateprediction/modellingofdebrisflow.Theaccurate
assessmentofentrainmentwillhelpinbetterpredictionoftheextentandthemagnitudeof
debrisflow.Accordingly,thisstudyshouldlookintonumerical,empiricalandanalytical
techniquestostudythemechanismofmaterialentrainment.Numericalstudiesusingthean
entrainmentmodelimbeddedintheRAMMS2-Dorinanyothersimilarsoftwareshallbe
used.Asensitivityanalysisoftherheologicalandentrainmentparametersonthedebris
flowrun-out,heightandvelocityshallbecarried-out.
Collaborations:
E39-Statensvegvesen
Contact:
[email protected]
Landslides:
E39–Poretrykketsfordelingiskjærsonenietflomskred
Porewaterpressuredistributionintheshearzoneofdebrisflow
Keywords:
landslides,geohazard,laboratorymodels
Description:
TheE39projectwillbuildamodernroadcommunicationalongWesternNorway.
Numerousvalleys,slopes,slideareasandheavyrainfallregionsalongtheroutecallsfor
increasedattentiontothegeohazardsandthesafetyandoperationalqualityoftheroad.In
thisproject,theclimatechangeandwaterdominatedearthmovementsisaddressed.The
projectwillworktowards:Modeltestingofwaterdominateddebris/mudflowsinthe
laboratory.Increasethemodelingcompetenceinflowslide/mudslidebycomputational
methodsasCFDandformulationsforerosion/soil-waterinteraction,basedonexisting
modelsandusingopensourcecodesavailable.Developimprovedmethodsfordesignof
diversionstructuresandbarriers.Estimationofloadsonbarriersandstructures.
Porewaterpressuredistributionsintheshearzoneofdebrisflowsinfluencestheinternal
stressstructureofdebrisflow.Assessmentofthedistributionofporewaterpressureinsidea
movingdebrisisdifficult.However,usingsomespecialinstrumentationonecantryto
measureitinthelaboratoryexperiments.Accordingly,thisstudywilllookintothe
significanceofgrainsizedistributionandfinecontentinporepressurebuild-upand
dissipationinvarioustypeofdebris.Thetopicshalllookintotheexistenceofoptimal
velocityconcerningporepressurebuild-upwithdilationtheoryandexploreporepressure
build-upindepositswithvaryingpermeability,flowvelocityanderosiondepth.
Collaborations:
E39-project
Contact:
[email protected]
Landslides:
E-39Tiltakmotflomskred
Countermeasuresfordebrisandmudflowhazards
Keywords:
landslides,geohazards,flowslides,countermeasures
Description:
Sources:useofstructuralcountermeasuresfordebrisflowinSwitzerland(Source:HaraldNorem,NPRAandGeobruggAG)
ThisstudyisaimingtoprovideimprovedknowledgeforasaferE39highwayinwestern
Norway.Focusistowardseffectivecountermeasuresfordebrisandmudflowhazards.This
shallstudyshalllookforinnovativesolutionsandexplorepossibilities.Thestudyshall
improvetheunderstandingofthedynamicforcesfromandthebehaviourofthefluidized
soil/watermassintheflowpath,innarrowspacesandstructureunderpasses.Inthestudy,
variouscountermeasuresshallbeappliedandstudiedwithrespecttoforces,efficiencyand
functionality.
Collaborations:
E39-Statensvegvesen
Contact:
[email protected]
Arctictechnology:
Fundamenteringpåpermafrost
Keywords:
arctictechnology
Description:
Fundamenteringpåisrikpermafrostforutsetteratvarmenfrabyggetikkevarmeroppog
tinerunderliggendepermafrost.ILongyearbyen,Svalbard,erdenmesttradisjonsrike
fundamenteringsmetodentrepeler,sattnedtil5-6meteroginnfrossetigysemasse.Forbyer
somBarentsburgogPyramiden,samtnæringsbyggiLongyearbyenogSveabrukesofte
andrefundamenteringsmetoder,somfeksplatepåmark,grovebetongpelerellertradisjonell
fundamenteringpåbankettunderdetaktivelaget.Brukavisolasjonog/ellerventilering
derkaldvinterluftsirkuleresforåholdesedimenteneunderfundamentetfrosne,eraktuelle
metoder.Masterprosjektetgårpåvurderingavforskjelligefundamenteringsmetoderog
erfaringermeddissesamtetpåfølgendestudiemedsiktepåforbedringavenellerflereav
dissemetodene.
Collaborations:
InstanesPolarA.S.,UNISSvalbard
Contact:
ArneInstanes([email protected]),Tlf.48003443InstanesPolarAS
ArnfinnEmdal,NTNU,[email protected]
Arctictechnology:
Thermomechanicalmodeling(www.ntnu.edu/samcot)
Keywords:
numericalanalysesarctictechnology
Description:
TestingofdifferentprogramsforTMHmodeling.
A.Reviewandunderstandingofthetheoreticalformulationsinvolvedinthemodeling
ofT(H)Mcoupledproblemsingeomechanics
B.Selectionofgeotechnicalapplicationareaswherebenchmarkdatacanbeavailable,
suchasnuclearwastedisposal,energypiles,geothermalenergyorgroundfreezing
C.Numericalstudyofselectedproblemsinafiniteelementsoftwarepackage;
comparisonoftheresultsagainsteachotherandbenchmarkdata
Studyandcomparisonofsequential(iterative)andfullycoupledsolutionmethodsfor
selectedapplicationproblems
LINKTOSAMCotresearchproject
Collaborations:
SAMCOTresearchproject
Contact:
[email protected]
[email protected]
Arctictechnology:
TOPIC1:Kartleggingavskrediarktiskstrandsonetilnærmetmedprobabilistiskemetoder/Coastal
landslidemappingprobabilisticapproachexperimentedonArcticcoasts
Keywords:
arctictechnology,coastal,landslide,probabilistics
Description:
Onthisproject,thestudentisable
todefineandorientatehis/herresearchtowardhis/herpersonalinterest.Descriptionbelow
isgivenasasuggestion.
Arcticcoastshavebeenstudiedsince3yearswithintheSAMCoTprojectframe
(SustainableArcticmarineandCoastalTechnology).Processesandmechanisms
responsibleoferosionhavebeenidentifiedandpartiallymodelledatresearchsitessituated
bothinSvalbardandinNorthernRussia.Theaimofthisprojectistoproposea
quantitativeclassificationoflandslidehazardbycalculatingaprobabilityofoccurrenceof
landslidesoneachpointofthestudiedarea.Themethodisbasedonaphysicallandslide
modellingandintegratedintoanexistingGISandprobabilisticsoftware.
Olivieretal.,(2013)presentanexampleofapproachwhichcouldbeadoptedinthis
project.
Ref.OlivierM.,SedanM.,andMonodB.,2013.ContributionofPhysicalModellingto
LandslideHazardMapping:CaseoftheFrenchBasqueCoast.Margottinietal.(eds.),
LandslideScienceandPractice,Vol.5,DOI10.1007/978-3-642-31427-8_14
Moreinfo:SAMCot
Collaborations:
SFI-SAMCot
Contact:
Post.Doc.EmilieGuegan,[email protected]
ProfessorSteinarNordal,[email protected]
PhD-studentIvanDepina,[email protected]
Arctictechnology:
TOPIC2:Stabilitetavtinendeskråningerlangsarktiskkyst/
ModellingthawingslopestabilityofArcticcoasts
Keywords:
arctictechnology
Description:
Onthisproject,thestudentisabletodefineandorientatehis/herresearchtowardhis/her
personalinterest.Descriptionbelowisgivenassuggestion.Thermalregimeinfrozenground
drivesitsmechanicalbehavior.Soilthermalregimehasbeenmonitoredsince3yearsina
coastalresearchsiteinSvalbard.Whilepreliminarythermalandslopestabilitymodelhave
beentested,furtheranalyticalandnumericalsimulationsarerequiredtocapturethestability
evolutionoffrozenslopes.AcomparisonbetweenthenewlyreleasedPLAXISthermal
analysisandthe“in-house”developedGeo-studiomodelcouldbedone.
ThereisapossibilityinthisprojecttointeractwiththemarinegroupatBAT/NTNUonwave
modelingtoaddtothegeotechnicalapproachincoastalstabilityproblem.
Collaborations:
UNISSvalbard
Contact:
SteinarNordal(Prof.),[email protected]
EmilieGuegan(Post-doc),[email protected]
Arctictechnology:
TOPIC3:Varmefluksmåler:Etnyttgeotekniskverktøyforundersøkelseavfrossengrunn?
Heatfluxmeter:anewgeotechnicaltoolinfrozenground?
Keywords:
arctictechnology,fieldmeasurement
Description:
Thethermalregimeinfrozengrounddrivesitsmechanicalbehavior.Preliminary
investigationsofsoilthermalpropertiesarethereforefundamentalinpermafrostarea.While
somealgorithmexisttoestimatethethermalproperties,fieldmeasurementofsoil
diffusivityarechallenginginremoteArcticareawheredrillingsystematicallydisturbes
frozensamples.Anewmethodwasimplementedin2014toassesssoilthermalproperties
usingaheatfluxmeter.TheheatfluxmeterhasbeeninstalledinaresearchsiteinSvalbard.
Thisprojectwillhavetheprimeresponsibilitytoanalyzethefirstreadingofthe
measurementsandcomparethemwithknownthermalpropertiesdataofthissite.Thisisa
newmethod,verypromising,whichhasneverbeentestedbeforeinfrozenground.
Collaborations:
UNISSvalbard
Contact:
SteinarNordal(Prof.),[email protected]
EmilieGuegan(Post-doc),[email protected]