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37th DFIAnnualConferenceonDeepFoundations
OCTOBER,2012 1
DAVIDB.COLEMAN/ALFRANIOPRADO
UNDERPINNING&FOUNDATION SKANSKA
OBJECTIVE:
NYParkscontracttoconnecttheexistingparkpathwalkalongHudsonriverparalleltotheHenryHudsonParkway.
Installadeepfoundationsolutiontosupportoverthewaterplatform.
Minimizenoiseandmarineenvironmentalimpacts.
Trafficflowcannotbeaffected.
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3
Henry Hudson Pkwy
4
104Drilledshafts16inchesindiameter
20EachInstalledfromlandusingBauerDrillRigBG24
84Eachinstalledfromwaterusingajackupbargeandcrawlercranewithfixedleads.
DrilledshaftsinHudsonRiverrequiredrocksocketstoresisttheiceloadsandtidalforces.
Averagedrilleddepthsrangefrom45to64feettobedrock.
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Entireareaunderwateratbeginningofthe20th
century.
Areafilledtodepthsof3040feetduringHenry
HudsonPkwyconstruction.
Fillconsistsofsignificantboulderandboulder
fragments.
Soilaggregatematerialsandtrappedorganicsiltsand
clays.
WeatherrockandMicaSchistbedrock.
5
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Workingontidalwater(6).
Singlepassdrillingtoavoidsplicingofcasing.
Controlofdrillspoilsonwater.
UrbanEnvironment.
Obstructions Boulders,riprap,andcobbles.
7
Drillingthru
organics/clay
deposits
may
plug
up
hammer.
Materialhandling/placementinlimitedspace.
ManmadematerialfillcoulddamageDHDtools
WATERWORK
Establishedbaselinecontractor/ownerforobstructionrisk.
Drillingmethod combinationof:
Symmetrix STDSystem(toadvancecasingthroughobstructions)
Bermingham leadssystemusingareversecirculationHydraulicdrillhead(bringscuttingsthroughthedrillstring)
Monitordrillrateatorganicsiltlayers.
Backupplan changingovertriconerotarysystemifplugoccurs.
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LAND
WORK
Conventionaldrillingtechniques Bauerdrillrig,augersandcorebarrels.
ToaddresspotentialdamageofDHDduetopresenceofmanmadematerialobstructions.
BuildingInformationModel
(BIM)presented
to
client
to
demonstratemeansandmethods.
9
16diameterwallFy=
35ksi.Epoxycoated
permanentcasing.
4,000psiconcreteAggr.
14.69diameterrock
socket4feetinlength
(Watershaftsonly).
10
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ORIGINALDESIGN ALTERNATEDESIGN
11
Reinforcingelementlengthsinexcessof70ft.
OriginalDesigncageswouldbedifficulttohandle.
AlternateDesignsteelbeam(samestiffness)are
easiertohandle.
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Projectwasfinishedwithinbudgetandschedule.
Lowenvironmentalandtrafficimpact.
Selecteddrillmethodsandtoolsmitigatedrisksduetositeconditions.
Financialriskassociatedwithobstructionremovalwasmitigated.
Establishedbaselinepenetrationratesusedtodeterminecompensabledelays.
Approachwasadvantageousforownerandcontractor.
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LookingNorth(FacingtowardsGeorge
WashingtonBridge)
LookingSouth
(Facingtowards
Manhattan)
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NewYorkCityDepartmentofParksand
Recreation
Designer:StantecConsulting.
TrafficEngineer:VollmerAssociatesLLP
LommaConstructionCorporation
Proj.Manager:PradyGandavarapu.
UnderpinningandFoundationSKANSKA
Proj.Manager:CraigMeltzer
Superintendent:JasonFrederick
TechnicalConsultant:DavidColeman
Proj.Engineer:AlfranioPrado.16
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