Tom Lunne, Peter Kay Robertson, John J. M. Powell, J. J. M. Powell - Cone penetration testing in geotechnical practice-Taylor & Francis (1997).pdf
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Tom Lunne, Peter Kay Robertson, John J. M. Powell, J. J. M. Powell - Cone penetration testing in geotechnical practice-Taylor & Francis (1997).pdf
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ConePenetrationTestinginGeotechnicalPracticeTomLunnePeterK.RobertsonJohnJ.M.PowellBLACKIEACADEMIC&PROFESSIONALAnImprintofChapman&HallLondonWeinheimNewYorkTokyoMelbourneMadrasLISTOFCONTENTSLISTOFCONTENTSvPREFACEixACKNOWLEDGEMENTSxiSYMBOLLISTxiiCONVERSIONFACTORSxviGLOSSARYxxii1.INTRODUCTION11.1Purposeandscope11.2GeneraldescriptionofCPTandCPTU11.3RoleofCPTinsiteinvestigation21.4Historicalbackground41.4.1Mechanicalconepenetrometers41.4.2Electricconepenetrometers61.4.3Thepiezocone72.EQUIPMENTANDPROCEDURES82.1Conepenetrometerandpiezocone.8?
2.2Pushingequipment102.2.1Onland102.2.2Overwater132.2.3Depthofpenetration142.3Testprocedures162.3.1Pre-drilling,onlandtesting162.42.52.62.72.82.92.3.2Verticality2.3.3Referencemeasurements2.3.4Rateofpenetration2.3.5Intervalofreadings2.3.6Depthmeasurements2.3.7Saturationofpiezocones2.3.8DissipationtestDataacquisitionCalibrationofsensorsMaintenanceChoiceofcapacityofloadcellsPrecisionandaccuracySummaryofperformancechecksandmaintenancerequirements161717171818192020222223243.CHECKS,CORRECTIONSANDPRESENTATIONOFDATA253.1Factorsaffectingmeasurementsandcorrections253.1.1Pbrewaterpressureeffectsonqcand3.1.23.1.33.1.43.1.53.1.63.1.7fsFilterlocationEffectofaxialloadonporewaterpressurereadingsTemperatureeffectsInclinationCalibrationandresolutionoferrorsEffectofwear25283131323233viLISTOFCONTENTS3.1.8CorrectionforCPTUzeroedatthebottomofaborehole333.2Presentationofresults343.2.1Measuredparameters343.2.2Derivedparameters363.2.3Additionalinformation383.3Checksondataquality384.STANDARDSANDSPECIFICATIONS394.1ISSMFEInternationalReferenceTestProcedureforConePenetrationTest(CPT)394.2SwedishGeotechnicalSociety(SGF):
RecommendedStandardforConePenetrationTests(1993)394.3NorwegianGeotechnicalSociety(NGF):
GuidelinesforConePenetrationTests(1994)434.4ASTM:
StandardTestMethodforPerformingElectronicFrictionConeandPiezoconePenetrationTestingofSoils(1995)434.5DutchStandard:
DeterminationoftheConeResistanceandSleeveFrictionofSoil.NEN5140(1996)434.6Recommendations445.INTERPRETATIONOFCPT/PIEZOCONEDATA455.15.25.35.4Generalfactorsaffectinginterpretation5.1.15.1.25.1.35.1.45.1.55.1.6EquipmentdesignInsitustressesCompressibility,cementationandparticlesizeStratigraphyRateofpenetrationPorepressureelementlocationSoilstratigraphySoilclassificationInterpretationinfine-grainedsoils5.4.15.4.25.4.3Statecharacteristics5.4.1.1Soilunitweight5.4.1.2Overconsolidationratio5.4.1.3InsituhorizontalstressStrengthcharacteristics5.4.2.1Undrainedshearstrength5.4.2.2Sensitivity5.4.2.3EffectivestressstrengthparametersDeformationcharacteristics5.4.3.1Constrainedmodulus5.4.3.2UndrainedYoungsmodulus5.4.3.3Smallstrainshearmodulus454646464647485051555656566163636869717173745.4.4Flowandconsolidationcharacteristics745.4.4.1Coefficientofconsolidation755.4.4.2Coefficientofpermeability(hydraulicconductivity)805.5Interpretationincoarse-grainedsoils815.5.1Statecharacteristics815.5.1.1Relativedensity(densityindex)815.5.1.2Stateparameter855.5.1.3Overconsolidationratio885.5.1.4Insituhorizontalstress885.5.2Strengthcharacteristics895.5.2.1Effectivestressstrengthparameters895.5.3Deformationcharacteristics935.5.3.1Youngsmodulus935.5.3.2Constrainedmodulus935.5.3.3Smallstrainshearmodulus945.6Availableexperienceandinterpretationinothermaterial945.6.1Intermediatesoils(clayeysandstosilts)955.6.1.1Penetrationbehaviour955.6.1.2Typicalresultsandclassification955.6.1.3Undrainedshearstrength965.6.1.4Effectivestressstrengthparameters965.6.1.5Constrainedmodulus965.6.1.6Smallstrainshearmodulus975.6.1.7Coefficientofconsolidation985.6.1.8Generalexperience985.6.2Peat/organicsilt985.6.3Underconsolidatedclay1005.6.4Chalk1005.6.5Calcareoussoils1015.6.5.1Soilclassification1025.6.5.2Undrainedshearstrength1025.6.5.3Relativedensity1035.6.5.4Effectivestressstrengthparameters1035.6.5.5Pilesidefriction1035.6.6Cementedsands1035.6.7Snow1075.6.8Permafrostandice1075.6.8.1Identificationofpermafrost/icelayers1075.6.8.2Specialproceduresforpenetrationtestsinfrozensoil1085.6.8.3Determinationofcreepparameters1085.6.8.4Generalcomment1115.6.9Gashydrates1115.6.10Residualsoils1115.6.11Minetailings1125.6.12Sawdustandwoodchoppings1145.6.13Dutchcheese1165.6.14Slurrywalls116LISTOFCONTENTSvii5.6.15Volcanicsoils1175.6.16Fuelash1175.6.17Loesssoil1195.6.18Lunarsoil1205.7Examplesofunusualbehaviour1205.7.1Limitingnegativeporepressuresduetocavitation1205.7.2Negativeporepressuremeasurementwithfilteronthecone1215.7.3Effectoftheweightofrigonshallowtestresults1225.8Theuseofnon-standardequipmentorprocedures1235.8.1Conesizeandscaleeffects1235.8.2Conepenetrometergeometry1255.8.2.1Lengthofthecylindricalportionbehindtheconeincludedinqc1255.8.2.2Reducedareabehindthecone1255.8.2.3Non-standardpositionandareaoffrictionsleeve1265.8.2.4Coneapexangle1275.8.3Rateofpenetration1275.8.4Set-uptests1285.8.5Applyingwaterduringpenetration1325.8.6Vibratoryconepenetrometer1325.9Statisticaltreatmentofdata1325.9.1Definitions1335.9.2Sourcesofuncertaintyandvariabilityofsoilproperties1345.9.3Statisticaltreatment1355.9.4SiteinvestigationstrategyandBayesianupdatingtechniques1435.9.5Recommendation1445.10Softwareapplication1456.5.2.3Minimumundrainedshearstrength1716.5.3Recommendationsforliquefactionevaluation1716.DIRECTAPPLICATIONOFCPT/CPTURESULTS1496.1CorrelationswithSPT1496.2Deepfoundations1516.2.1Axialcapacity1516.2.2Factorofsafey1556.2.3Settlement1556.2.4Skirtpenetrationresistance1566.3Shallowfoundations1576.3.1Bearingcapacity1576.3.2Settlement1586.4Groundimprovement-qualitycontrol1596.5Liquefaction1646.5.1Liquefactiondefinitions1646.5.2ApplicationofCPTforliquefactionassessment1666.5.2.1Cyclicsoftening1666.5.2.2Flowliquefaction1697.ADDITIONALSENSORSTHATCANBEINCORPORATED1727.1Lateralstressmeasurements1727.1.1Equipment1727.1.2Typicalresults1737.1.3Interpretation1747.2Conepressuremeter1757.2.1Equipment1757.2.2Testingprocedure1777.2.3Interpretation1787.3Seismicmeasurements1797.3.1Equipmentandprocedures1807.3.2Typicalresultsandinterpretation1817.4Electricalresistivitymeasurements1827.4.1Principlesformeasurement1827.4.2Equipmentandprocedures1837.4.3Typicalresultsandinterpretation1847.5Heatflowmeasurements1867.6Radioisotopemeasurements1867.6.1Equipment,measurementprinciplesandprocedures1867.6.2Typicalresults1897.6.3DiscussiononsoildensitymeasuredbyNDT1897.7Acousticnoise1908.GEO-ENVIRONMENTALAPPLICATIONSOFPENETRATIONTESTING1928.1Objectivesofageo-environmentalsiteinvestigation1928.2CPTtechnologyforsitecharacterization1938.3Geo-environmentalpenetrometerloggingdevices1938.3.1Temperature1938.3.2Electricalresistivityandconductivity1938.3.3Dielectricmeasurements1948.3.4pHsensors1958.3.5Redoxpotential1968.3.6Gammaandneutronsensors1968.3.7Laserinducedfluorescence1968.4Geo-environmentalpenetrometersamplingdevices1998.4.1Liquidsamplers1998.4.2Vapoursamplers2018.4.3Solidsamplers2018.5Sealinganddecontaminationprocedures2018.6Futuretrends2028.7Summary203viiiLISTOFCONTENTS9.EXAMPLES2049.2.4Normallyconsolidatedsoftalluvialn,c,nAclay,Bothkennar,UK2189.1Exampleprofiles204J9.1.1Marine,lightlyoverconsolidatedclay,Onsay,Norway2049.1.2Organicclay,lightlyoverconsolidated,10.FUTURETRENDS223LillaMellosa,Sweden2059.1.3OverconsolidatedYoldia(Aalborg)10.1Recentdevelopments223clay,Aalborg,Denmark20710.2Futuredevelopments2239.1.4Overconsolidatedclaytill,Cowden,UK208REFERENCES2259.1.5Sandoversiltyclay,McDonaldsFarm,Vancouver,BC2099.1.6Overconsolidateddensesand,APPENDICES249Dunkirk,France210APPENDiXA:
ISSMFEREFERENCETEST9.1.7Normallyconsolidatedverysiltyclay,PROCEDURE249Pentre,UK2119.2Workedexamples213APPENDIXB:
SWEDISHSTANDARDFORCONE9.2.1Loosetomediumdensesand,MasseyTESTING261Tunnelsite,Canada213APPENDIXC:
CALIBRATIONCHAMBER9.2.2Verydenseoverconsolidatedsand,TESTINGOFSANDYSOILS291Sleipner,NorthSea2169.2.3StiffoverconsolidatedGaultclay,Madingley,UK217INDEX305
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