GB50202-2002英文版(建筑地基基础工程施工质量验收规范)讲课稿.doc

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1、Good is good, but better carries it.精益求精，善益求善。GB50202-2002英文版(建筑地基基础工程施工质量验收规范)-UDCNationalStandardofthePeoplesRepublicofChinaPGB50202-2002建筑地基基础工程施工质量验收规范CodeforAcceptanceofConstructionQualityofBuildingFoundationIssuedonApril12002ExecutedonMay12002JointlyPromulgatedbytheMinistryofConstructionandthe

2、StateGeneralAdministrationforQualitySupervisionandInspectionandQuarantineofthePeoplesRepublicofChinaNationalStandardofthePeoplesRepublicofChina建筑地基基础工程施工质量验收规范CodeforAcceptanceofConstructionQualityofBuildingFoundationGB50202-2002Compiledby:ConstructionandManagementCommissionofShanghaiMunicipalityApp

3、rovedby:MinistryofConstructionoftheP.R.C.Executedon:May12002ChinesePlanningPress2002BeijingNationalStandardofthePeoplesRepublicofChinaCodeforAcceptanceofConstructionQualityofBuildingFoundationGB50202-2002CompiledbyConstructionandManagementCommissionofShanghaiMunicipalityPublishedbyChinesePlanningPre

4、ss(Address:4/F,BlockC,GuohongMansionJia11,MuxudiBeili,XichengDistrict,Beijing)(Zipcode:100038Tel:6390641363906416)DistributedbyBeijingbranchofXinhuaBookstorePrintedbyWorldKnowledgePrintingHouse850x1168mm1/322.75printedsheets67thousandChinesecharactersFirstpublishedinApril2002SecondprintedinJune2002N

5、umber150001-190000volumesUnifiedBookNo.:1580058482Price:RMB15.00NoticeonIssuingtheNationalStandardoftheCodeforAcceptanceofConstructionQualityofBuildingFoundationJ.B.2002NO.79PursuanttotheNoticeonthePrintingandDistributionofthePreparationandModificationPlansof1997sEngineeringConstructionStandards(J.B

6、.1997NO.108),thisCodeforAcceptanceofConstructionQualityofBuildingFoundationisrectifiedjointlybytheConstructionandManagementCommissionofShanghaiMunicipalityandotherrelevantdepartments.OurministryhasarrangedfortheexaminationbyrelateddepartmentsoftheCodeandherebyapproveditasanationalstandardwiththeseri

7、alnumberofGB5022-2002andtobeeffectiveonMay12002.The4.1.5,4.1.6,5.1.3,5.1.4,5.1.5,7.1.3and7.1.7articleshereofarecompulsoryandmustbestrictlyandexactlyperformed.UpontheexecutionofthisCode,anyrelatedcontentswithrespectofearthworksstipulatedinthepreviouslyformulatedSpecificationsforConstructionandAccepta

8、nceofGroundandFoundationsGBJ202-83andSpecificationsforConstructionandAcceptanceofEarthworksandExplosionEngineeringGBJ201-83shallbeabolishedandterminatedimmediately.ThisCodeshallbegovernedbytheMinistryofConstructionoftheP.R.C.,andinterpretedbytheMinistrywithrespectofthecompulsoryarticleshereofandbySh

9、anghaiFoundationEngineeringCompanywithrespectofthetechnicaldetailshereof,andpublishedanddistributedbyChinesePlanningPressundertheorganizationofthestandardquotainstituteoftheMinistryofConstructionoftheP.R.C.MinistryofConstructionoftheP.R.C.April12002Supportingcompilers:FoundationInstituteofChinaAcade

10、myofBuildingResearchDesigninstituteofNO.3HarbouringBureauofCHECComprehensivesurveyresearchanddesigninstituteundertheMinistryofConstructionTongjiUniversityChiefdrafters:GuiYekunYeBorongWuChunlinLiYaogangLiYaoliangChenXiquanGaoHongxingGuoShutaiMiaoJunfaLiKangjunQiuShizhongQianJianmingLiuDelinTableofCo

11、ntents1GeneralRules12Terms23BasicRegulations44Foundation54.1GeneralTerms54.2Soil-limeFoundation64.3Sand-sandstoneFoundation64.4GeosyntheticsFoundation74.5FlyashFoundation84.6DynamicConsolidationFoundation94.7GroutingFoundation94.8PreloadingFoundation114.9VibrationImpactFoundation124.10JetGroutingFou

12、ndation124.11Soil-cementMixedPileFoundation134.12Soil-limeCompactedColumnCompositeFoundation144.13CementFlyashGravelPileCompositeFoundation154.14TampingSoil-cementPileCompositeFoundation164.15SandPileFoundation175PileFoundation195.1GeneralTerms195.2StaticForcePressing-inPiles215.3Pre-tensionedPre-st

13、ressingTubePile225.4PrecastConcretePile235.5SteelPile255.6Cast-in-placeConcretePile276Earthwork296.1GeneralTerms296.2ExcavationofEarthwork296.3BackfillingofEarth317FoundationPit327.1GeneralTerms327.2Row-pileWallTimbering337.3Soil-cementPileWallTimbering347.4BoltingandSoil-nailedWallSupport357.5Steel

14、orConcreteSupportSystem357.6UndergroundDiaphragmWall367.7SunkWellandCaisson387.8WaterLoweringandDrainage428QualityAcceptanceofDivisional(Sub-divisional)Work44ScheduleAKeyPointfortheSurveyofGroundandFoundation45ScheduleBPerformanceofPlasticDrainageBelts48ExplanationforUsageofWordsintheStandard49-1Gen

15、eralRules1.0.1Forthepurposeofenhancingsupervisionandmanagementoverengineeringqualityandunifyingacceptancerulesonconstructionqualityofbuildingfoundationssoastoensureengineeringquality,thisCodeisherebymadeasfollows.1.0.2ThisCodeshallbeapplicabletothequalityacceptanceoffoundationsinbuildingworks1.0.3Re

16、quirementsstipulatedinanyoftheengineeringtechnicaldocumentsandcontractsthatareadoptedforfoundationconstructionshallatleastattainthestipulationssetforthhereof.1.0.4ThisCodeshallbeusedincooperationwiththeUnifiedStandardforQualityAcceptanceofBuildingEngineeringGB50300thatiscurrentlyinforceandeffective1

17、.0.5Acceptanceofthequalityofbuildingfoundationsshall,inadditiontothisCode,complywithotherrelatednationalcodesandstandardsthatarecurrentlyinforceandeffective.2Terms2.0.1GeosyntheticsfoundationAbuildingfoundationthatisformedbycoveringgeosyntheticswithsoil(orsands),wheregeosyntheticsmaybeoneormorethano

18、nelayer.Generallyspeaking,thismethodissuitableforshallowfoundations.2.0.2HeavytampingfoundationUnderthiscircumstance,afreefallingheavytamperwillbeutilizedtotampsoil-coveringshallowfoundationstoformauniformlyhardenedsurfacelayertobeartheloadupon.Whenpunching,thetampersdropheightshallbemuchbiggerthant

19、hefoundationtobetamped.2.0.3DynamicconsolidationfoundationAsregardsthisterm,theprocessissimilartothatforheavytampingfoundations,exceptthatthetampersdropheightinthiscasemustbemuchbiggerthanthatforheavytampingfoundation.2.0.4GroutingfoundationInthiscase,thepreparedchemicalorcementgroutwillbeinfusedthr

20、oughconduitsintotheholesofthesoilbody,andintegratedwiththebodysoastoincreasethebodysstrengthandreduceitscompressibilityandpermeability.2.0.5PreloadingfoundationImposealoadontheundisturbedsoiltoextrudethewatercontained,soastorealizethepre-consolidationofsoilandreducethebuildingfoundationslatesubsiden

21、ceandincreasethefoundationsbearingcapacity.Therearethreemethodsforthemakingofpreloadingfoundations,namely,heapedpreloading,vacuumpreloadingandprecipitationpreloading.2.0.6JetgroutingfoundationAsforthisfoundation,adrillerwillbeutilizedtodirectlybringagrouthosewithjetnozzleintothepredeterminedposition

22、underthesoillayer,orputthehoseatthepredeterminedpositionafterdrillingahole.Then,thegroutorwaterwillbedrivenbyhighpressuretosprayoutofthejetnozzle.Thewhirlyspayedgroutwillintegratewiththesoiltoformaconsolidatedbody.Theprocessofonlyutilizingasinglehosetospaygroutiscalled“one-pipemethod”,thatofutilizin

23、gtwopipestospayhigh-pressureairandgroutcalled“two-pipemethod”,andthatofutilizingthreepipestospayhigh-pressurewater,high-pressureairandgroutsimultaneouslyiscalled“three-pipemethod”.2.0.7Soil-cementmixedpilefoundationUtilizethecementasthesolidifyingagentand,byablendingmachine,mixthecementwiththefounda

24、tionssoil,andthehardenedmixturewillformthisfoundation.2.0.8Soil-limecompactedcolumnDrillholesintheundisturbedsoil,fillinplainsoilorlimebylayers,tampthem,andmakethemcompacttomakethesurroundingsoilbodycompactsoastoasolidfoundation.2.0.9Cementfly-ashgravelpileAfterutilizingadrillerwithlongtwistbitstodr

25、illholesormakingholeswithasunkentubepilemachine,andfillbyapumporthroughacharginghopperthemixtureofcement,flyashandreducedstoneintoholestoformcompactandsolidfoundations.2.0.10PressedpilebyanchorrodThispilesinkingtechnologyutilizesananchorrodtopressthepileintothesoilgradually,wheretheanchorcanuseavert

26、icalsoilanchor,oragroundanchorthatistemporarilyanchoredinconcretesub-slaborpilecap.3BasicRegulations3.0.1Priortotheconstructionofbuildingfoundations,completegeologicalsurveydetailsandtheinformationofstructureaboutsurroundingpipelines,buildings,structuresandotherutilitiesmustbeprepared.Whennecessary,

27、constructionsurveysandexaminationshallbecarriedoutsoastoensurethefoundationsqualityandthesafetyofnearbybuildings.KeypointsabouttheconstructionsurveyrefertoScheduleA.3.0.2Constructionunitsmustownscorrespondingprofessionalqualificationsandshallestablishedimprovedqualitycontrolandinspectionsystems.3.0.

28、3Unitengagedintheinspectionofbuildingfoundationsandtestsforcertificationmustacquirethequalificationcertificatesissuedbytheprovincialandabove(includingtheprovincial,autonomousregion,municipalauthority)competentconstructionauthorityandcertificatesforqualifiedinspectionunitsissuedbycompetentinspectiona

29、uthority.3.0.4Asadivisionalwork,foundations,ifnecessary,maybefurtherdividedintoanumberofsub-divisionalworkpursuanttotheUnifiedStandardforQualityAcceptanceofBuildingsEngineeringGB50300currentlyinforce.3.0.5Intheeventthatabnormalconditionsoccurredinthecourseofconstruction,theconstructionshallimmediate

30、lybestopped.Constructionsupervisionandmanagementcompaniesorownersshallinvitesurvey,designandconstructionunitstojointlyanalyzetheconditionssoastosolvetheproblemsexisted,eliminatehiddenqualityshortagesanddetailtheminwriting.4Foundation4.1GeneralTerms4.1.1Thefollowingmaterialsshallbepreparedfortheconst

31、ructionofbuildingfoundations:1. Geotechnicalengineeringsurveymaterials.2. Type,allocationandstructurequalityofsurroundingbuildingsandundergroundfacilities.3. Engineeringdesigndrawings,designrequirementsandthestandardsrequiredtoattain,andmeansofinspection.4.1.2Thequality,testingitems,batchquantityand

32、inspectionmethodsofrawmaterials,suchassands,pebble,cement,steelmaterial,limeandflyash,shallcomplywithrelevantnationalstandardscurrentlyinforce.4.1.3Afterthefoundationsconstructioniscompleted,qualityacceptanceshouldbeproceededinaperiodofinactivity,whichisdeterminedbydesignrequirements.4.1.4Foundation

33、improvementworksshallgothroughatestingphasebeforethebeginningofformalconstructionsoastoverifypredeterminedconstructionparametersandimprovingeffects.Inloadtestsforverifyingtheeffectsofimprovement,theimposedloadshallnotbesmallerthantwotimesofthatofthedesignvalue.4.1.5Asregardsthelime-soilfoundation,sa

34、ndandsandstonefoundation,geosyntheticsfoundation,flyashfoundation,dynamicconsolidationfoundation,groutingfoundation,andpreloadingfoundation,theconstructionresults(foundationstrengthorbearingcapacity)mustattainthelevelindesignrequirements.Intermsofthenumberofinspection,atleastthreepointsarerequiredfo

35、reveryunitproject.Atthesametime,atleastonepointshallbeinspectedevery100m2foraprojectwiththeareaof1000m2orabove,andevery300m2foraprojectwiththeareaof3000m2orabove.Atleastonepointisnecessaryundereveryindependentfoundation,andonepointisneededevery20linearmeteralongthefoundationtrench.4.1.6Asregardsthes

36、oil-cementmixedpilefoundation,jetgroutingfoundation,sandpilefoundation,vibration-punchingpilecompositefoundation,soil-limecompactedcolumncompositefoundation,cementflyashgravelpilefoundationandsoil-cementtampingpilecompositefoundation,thenumberofinspectionofbearingcapacityshallbe0.5%-1%ofthetotalbutn

37、otlessthanthreeplaces.Iftheinspectionofsinglepilestrengthisrequired,theinspectionnumbershallbe0.5%-1%ofthetotalbutnotunderthreepiles.4.1.7Withtheexceptionofthemaincontrolitemssetforthinthearticlesof4.1.5and4.1.6ofthisCode,othermaincontrolandcommonitemsmaybeinspectedrandomly.However,amongthecomposite

38、foundations,soil-cementmixedpile,jetgroutingpile,vibration-punchingpile,soil-limecompactedcolumn,cementflyashandtampingsoil-cementpileshallberandomlyinspectedbasedonapercentageof20%.4.2Soil-limeFoundation4.2.1Soil,limeorcement(whenthelimeelementisreplacedwithcement)andtheirmixingratioshallbeinlinewi

39、thdesignrequirements.Soil-limeshallbeuniformlymixed.4.2.2Inthecourseofconstruction,thethicknessofvariouslayers,overlaplengthoftheupperandlowerlayersofsections,waterquantityfortamping,numberoftampingandcompactingcoefficientshallbeexaminedandmeasured.4.2.3Afterthecompletionofconstruction,thesoil-limef

40、oundationsbearingcapacityshallbeinspected.4.2.4TheQualityinspectionstandardforsoil-limefoundationsshallcomplywithTable4.2.4.Table4.2.4Qualityinspectionstandardforsoil-limefoundationsNameNo.InspectioncontentsPermissiblevariationorvalueInspectionmethodUnitValueMaincontrolitems1Bearingcapacityoffoundat

41、ionDesignrequirementsBystipulatedmethod2MixingratioDesignrequirementsBasedonthevolumeratioatmixing3CompactingcoefficientDesignrequirementsMeasureonthespotCommonitems1Particlesizeoflimemm5Sieving2Contentoforganicsubstanceinsoil%5Laboratorialroasting3Particlesizeofsoilmm15Sieving4Watercontent(compared

42、withtherequiredoptimizedpercentage)%2Drying5Thicknessvariationoflayer(comparedwithdesignrequirements)mm50Waterlevel4.3Sand-sandstoneFoundation4.3.1Rawmaterialsincludingsandandsandstoneshallmeetthedesignrequirementsforqualityandmixingratio,andshallbeuniformlymixed.4.3.2Duringthecourseofconstruction,t

43、hethicknessoflayersandtheoverlaplengthinsections,waterquantityfortamping,numberoftampingandcompactingcoefficientmustbeexaminedandmeasured.4.3.3Afterthecompletionofconstruction,thesand-sandstonefoundationsbearingcapacityshallbemeasured.4.3.4TheQualityinspectionstandardforsand-sandstonefoundationsshal

44、lcomplywithTable4.3.4.Table4.3.4Qualityinspectionstandardforsand-sandstonefoundationsNameNo.InspectioncontentsPermissiblevariationorvalueInspectionmethodUnitValueMaincontrolitems1BearingcapacityoffoundationDesignrequirementsBystipulatedmethod2MixingratioDesignrequirementsBasedonthevolumeorweightrati

45、oatmixing3CompactingcoefficientDesignrequirementsMeasureonthespotCommonitems1Contentoforganicsubstanceinsand-sandstonematerial%5Roasting2Contentofsoilinsand-sandstonematerial%5Waterwash3Particlesizeofsandstonemm100Sieving4Watercontent(comparedwiththerequiredoptimizedpercentage)%2Drying5Thicknessvari

46、ationoflayer(comparedwithdesignrequirements)mm50Waterlevel4.4GeosyntheticsFoundation4.4.1Beforetheconstruction,thephysicalproperty(includingthequality,thicknessandspecificgravityofunitarea),strength,ratioofelongationofgeosyntheticsmustbeinspectedandmeasured,sodothesoilandsand-sandstone.Geosynthetics

47、shallbeinspectedonabatchbasis,with5%foreverybatch.4.4.2Inthecourseofconstruction,stripping,layingthicknessandflatnessofbackfill,layingdirectionofgeosynthetics,overlaplengthorconditionofjoints,connectionbetweenthestructureandgeosynthetics,etc.mustbechecked.4.4.3Afterthecompletionofconstruction,thegeosyntheticsfoundationsbearingcapacityshallbemeasured.4.3.4TheQualityinspectionstandardforgeosyntheticsfoundationsshallcomplywithTable4.4.4.Table4.4.4QualityinspectionstandardforgeosyntheticsfoundationsNameN