Designation:D5778−12StandardTestMethodforElectronicFrictionConeandPiezoconePenetrationTestingofSoils1ThisstandardisissuedunderthefixeddesignationD5778;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoverstheprocedurefordeterminingthepointresistanceduringpenetrationofaconical-shapedpenetrometerasitisadvancedintosubsurfacesoilsatasteadyrate.1.2Thistestmethodisalsousedtodeterminethefrictionalresistanceofacylindricalsleevelocatedbehindtheconicalpointasitisadvancedthroughsubsurfacesoilsatasteadyrate.1.3Thistestmethodappliestofriction-conepenetrometersoftheelectricandelectronictype.Fieldtestsusingmechanical-typepenetrometersarecoveredelsewherebyTestMethodD3441.1.4Thistestmethodcanbeusedtodetermineporewaterpressuresdevelopedduringthepenetration,thustermedpiezo-cone.Porewaterpressuredissipation,afterapush,canalsobemonitoredforcorrelationtotimerateofconsolidationandpermeability.1.5Additionalsensors,suchasinclinometer,seismicgeo-phones(TestMethodsD7400),resistivity,electricalconductivity,dielectric,andtemperaturesensors,maybeincludedinthepenetrometertoprovideusefulinformation.Theuseofaninclinometerishighlyrecommendedsinceitwillprovideinformationonpotentiallydamagingsituationsduringthesoundingprocess.1.6Conepenetrationtestdatacanbeusedtointerpretsubsurfacestratigraphy,andthroughuseofsitespecificcorrelations,theycanprovidedataonengineeringpropertiesofsoilsintendedforuseindesignandconstructionofearthworksandfoundationsforstructures.1.7ThevaluesstatedinSIunitsaretoberegardedasstandard.WithinSection13onCalculations,SIunitsareconsideredthestandard.Othercommonlyusedunitssuchastheinch-poundsystemareshowninbrackets.Thevariousdatareportedshouldbedisplayedinmutuallycompatibleunitsasagreedtobytheclientoruser.Conetipprojectedareaiscommonlyreferredtoinsqu...
