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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.

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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).

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ORIGINALDESIGN ALTERNATEDESIGN

11

Reinforcingelementlengthsinexcessof70ft.

OriginalDesigncageswouldbedifficulttohandle.

AlternateDesignsteelbeam(samestiffness)are

easiertohandle.

12

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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