GB 50078-2008 GB50078-2008烟囱工程施工及验收规范-英文

专用

人人文库

NATIONALSTANDARD

OFTHEPEOPLESREPUBLICOFCHINA

CodeforConstructionandAcceptance

ofChimneyEngineering

GB50078-2008

ChiefDevelopmentDepartment:ChinaMetallurgicalConstructionAssociation

ApprovalDepartment:MinistryofHousingandUrban-RuralDevelopment

ofthePeoplesRepublicofChina

ImplementationDate:February1,2009专用

人人文库

ChinaPlanningPress

Beijing2015

图书在版编目(CIP)数据

烟囱工程施工及验收规范英文中华人民共和国住房和

GB50078-2008:/

城乡建设部组织编译北京中国计划出版社

.—:,2015.12

ISBN978-7-5182-0328-4

中烟囱工程施工技术规范中国英文烟

Ⅰ.①G…Ⅱ.①…Ⅲ.①----②

囱工程验收技术规范中国英文

----Ⅳ.①TU761.2-65

中国版本图书馆数据核字第号

CIP(2015)289910

ChineseeditionfirstpublishedinthePeoplesRepublicofChinain2008

EnglisheditionfirstpublishedinthePeoplesRepublicofChinain2015

byChinaPlanningPress

rd专用

3Floor,CTower,GuohongBuilding

No.A11,Muxidi-Beili,XichengDistrict

Beijing,100038

PrintedinChinabyBeijingJinghuaHucaisPrintingCO.,LTD

Ź2008byMinistryofIndustryandInformationTechnologyof

thePeoplesRepublicofChina

Allrightsreserved.Nopartofthispublicationmaybereproducedortransmittedinanyformor

byanymea人人文库ns,graphic,electronic,ormechanical,includingphotocopying,recording,

oranyinformationstorageandretrievalsystems,withoutwrittenpermissionofthepublisher.

Thisbookissoldsubjecttotheconditionthatitshallnot,bywayoftradeorotherwise,belent,

resold,hiredoutorotherwisecirculatedwithoutthepublisherspriorconsentinanyformof

blindingorcoverotherthanthatinwhichthisispublishedandwithoutasimilarcondition

includingthisconditionbeingimposedonthesubsequentpurchaser.

ISBN978-7-5182-0328-4

AnnouncementofMinistryoftheHousingandUrban-Rural

DevelopmentofthePeoplesRepublicofChina

No.118

NoticeonpublishingtheNationalStandardof

CodeforConstructionandAcceptanceofChimneyEngineering

CodeforConstructionandAcceptanceofChimneyEngineering

Thehasbeenapprovedasa

nationalstandard,thenumberisGB50078-2008.Thisnationalstandardwillbeimplementedon

February1,2009.Articles3.0.8,3.0.9,4.1.3,6.1.4,6.1.5,6.3.1,8.1.2,11.0.5,13.0.5,

13.0.11arecompulsoryprovisionsandmustbeenforcedstrictly.TheformercodeGBJ78-85

CodeforConstructionandAcceptanceofChimneyEngineering

shallbeabolishedsimultaneously.

AuthorizedbyResearchInstituteofStandadsandNormsMinistryofHousingandUrban-

RuralDevelopment.ThiscodeispublishedbytheChinaPlanningPr专用ess.

MinistryofHousingandUrban-RuralDevelopmentofthePeoplesRepublicofChina

September24,2008

人人文库

Foreword

Accordingtotherequirementsof"NoticeonPrintingtheDevelopmentandRevisionPlanof

NationalEngineeringConstructionStandardsin2004"(JianBiao[2004]NO.67),issuedby

Codeforconstructionand

MinistryofConstruction(MOC),thiscodeisamendedfromGBJ78-85

acceptanceofchimneyengineering

byChinaMCCJingtangConstructionCo.,Ltd.andrelavant

parties.

Intherevisingprocess,theeditorialstaffconscientiouslysummarizedtheexperienceregarding

tochimneydesign,construction,researchandperformance,collectedextensiveadvicefromrelevant

partiesandexpertsacrossthecountry.Afterrepeateddiscussionandmodification,theversionwas

reviewedandfinalized.

Therevisedcodecomprises15chaptersand5appendixes.Themaincontentsare:

1.Thecontentsrelatedtoqualityinspectionaregiven,andmaincontrolitemsandgeneral

itemsareputintothesametable.

2.Chapter"Terms"isgiven.Theselectedtermsmainlyrela专用tetokeywordsofchimney

engineering.

3.Chapter"BasicRequirements"isgiven.Itincludescommonregulationsofthechimney

constructionandacceptance.

4.ContentsoftruncatedconecompositeshellfoundationandMshapecompositeshell

foundationwereremoved.

5.Contentsrelatedtomassiveconcretearegiven.

6.Thestandardofthepermitteddeviationforthecenteraxisofchimneyshafthasbeenmuch

moreraised.

7.Morecontentsofchapter"Steelchimneyandsteelflue","ChimneyPlatform"and"Chimney

CorrosionResistance"aregiven.

8.Inthechapter"LiningandInsulation",contentsofunshapedrefractoryliningaregiven.

9.Partialcontentsofgeneralrequirementsofconstructionmethodswereremoved.

10.Contentsofwinterconstructionforsteelstructureandunshapedrefractoryaregiven.

Theprovisionsprintedinboldtypearecompulsoryonesandmustbeenforcedstrictly.

MinistryofC人人文库onstructionisinchargeoftheadministrationofthiscodeandtheexplanationof

thecompulsoryprovisions.ChinaMCCJingtangConstructionCo.,Ltd.isresponsibleforthe

explanationofthespecifictechnicalcontents.Allrelevantorganizationsarekindlyrequestedto

sumupyourexperiencesinactualpracticeduringtheprocessofimplementingthiscode.Ifany

modificationandsupplementsisconsidered,pleasesendtherelevantopinionsandadvicetothe

Codeforconstructionandacceptanceofchimneyengineering

managingteamforofChinaMCC

JingtangConstructionCo.,Ltd.(Add.16#XingfustreetFengrunDistrict,Tangshan,China;

Postcode064000)forthereferenceofthefutureamendment.

ChiefDevelomentOranization

pg:

ChinaMCCJingtangConstructionCo.,Ltd.

·1·

ParticiatinDevelomentOranizations

pgpg:

ChinaMetallurgicalEastEngineeringTechnicalCo.,Ltd.

NorthwestElectricalPowerConstructionNo.4EngineeringCompany

ShanghaiPowerCivilConstructionCompany

ChinaNo.2MetallurgicalConstructionCompany

ShanghaiFuchenCo.,Ltd.

ZhejiangKaiyuanErectionGroupCo.,Ltd.

XiaoganCityPlazaConstructionCo.,Ltd.

ChiefDraftinStaff

g:

XuJiaqingNiuChunliangFengJiayuShiYaohuiWengLin

DiYupuLuShipingZhangFengLiYongmin

专用

人人文库

·2·

Contents

…………………………

1General(1)

…………………………

2Terms(2)

……………

3BasicRequirements(3)

……………………

4Foundation(6)

…………………

4.1EarthworkandFoundationPit(6)

…………………

4.2ReinforcementSteelBarWorks(6)

…………………

4.3FormWorks(7)

………………

4.4ConcreteWorks(7)

……………

4.5QualityInspection(8)

…………

5BrickChimneyShell(13)

…………

5.1GeneralRequirements(13)

………………

5.2MasonryWorks(13)

……………

5.3QualityInspection专用(14)

……………………

6ReinforcementConcreteChimneyShell(16)

…………

6.1GeneralRequirements(16)

……………………

6.2ReinforcingSteelBarWorks(16)

…………………

6.3FormWorks(17)

………………

6.4ConcreteWorks(17)

……………

6.5QualityInspection(18)

………………

7SteelChimneyandSteelFlue(23)

…………

7.1GeneralRequirements(23)

……………

7.2FabricationandPre-assemblyWorksforSteelChimneyandSteelFlue(23)

………………

7.3WeldingWorks(23)

…………………

7.4ErectionWorksforSteelChimneyandSteelFlue(24)

……………

7.5QualityInspection(25)

……………

8ChimneyPlatform(33)

………

8.1PlatformFabri人人文库cationandErectionWorks(33)

……………

8.2QualityInspection(33)

…………

9LiningandInsulation(38)

…………

9.1GeneralRequirements(38)

………………

9.2BrickLining(Flue)andInsulation(38)

……………………

9.3UnshapedRefractoryLining(39)

……………

9.4QualityInspection(40)

……………

10ChimneyCorrosionResistance(42)

…………

10.1GeneralRequirements(42)

…………

10.2CorrosionResistanceCoatingMaterial(42)

·1·

…

10.3CorrosionResistanceofSodiumSilicateAcid-proofCementandAcid-proofMortar(44)

………

10.4CorrosionResistanceofAcid-proofBrick(46)

…………

10.5CorrosionResistanceofSodiumSilicateLightweightAcid-proofConcrete(47)

……………

11AncillaryWorks(49)

…………

12WinterConstruction(51)

…………

12.1GeneralRequirements(51)

…………………

12.2Foundation(51)

…………

12.3BrickChimneyShell(51)

………………

12.4ReinforcementConcreteChimney(53)

……………………

12.5SteelChimney,SteelFlueandSteelElements(54)

………………………

12.6Lining(54)

…………………

13WorkSafety(56)

…………………

14WorkQualityAcceptance(59)

……………

15ChimneyDrying(61)

…

AppendixARecordsontheInspectionforon-siteQualityManagement(63)

…

AppendixBRecordsontheQualityAcceptanceoftheInspectionBatch(64)

……

AppendixCRecordsontheQualityAcceptanceoftheItemizedWork(65)

AppendixDRecordsontheQualityAcceptanceoftheDivisional(S专用ub-Divisional)

………………

Work(66)

……………

AppendixERecordsontheQualityAcceptanceoftheUnit(Sub-Unit)Work(67)

…………

ExplanationofWordinginThisCode(71)

人人文库

·2·

1General

1.0.1

Thiscodeisestablishedtoregulatetheactionofchimneyconstructionandacceptance,

ensurethequalityofchimneyconstruction,andachievetheadvancedtechnology,safetyand

usability,aswellastheeconomicalrationality.

1.0.2

Thiscodeisapplicabletotheconstructionandacceptanceofbrick,reinforceconcreteand

steelchimney.

1.0.3

Thechimneyconstructionshallbeinaccordingwiththedesigndocuments.

1.0.4

Newtechnologypracticeisencouragedduringthechimneyconstruction.Thenewtechnologies

shallbetestedandappraised,andspecificregulationsshallbeestablishedbeforepromotion.

1.0.5

Thechimneyconstructionandacceptanceshallbecompliedwith,notonlytherequirements

stipulatedinthiscode,butalsothoseinthecurrentrelevantonesofthenation.

专用

人人文库

·1·

2Terms

2.0.1

Confiningbed

Itistheexteriorportionofthebrickinnertubeofsingleflueandmulti-fluechimney.Itisused

forsealingthefluegas.

2.0.2

Flue

Itisthefluetubeinsidethesingleflueandmulti-fluechimneyshaft.

2.0.3

Warningsign

Itistheaviationobstaclelightandcolorsigntoillustratethehigh-risingstructureortheshape

andheightofhigh-risingbuilding,aswelltoalertaircrafts.

2.0.4

Hydraulicslidingform

Itisthetechnologythattheconstructioniscontinuouslycarriedoutwithliftingtheoperation

platformandslidingformsbyhydraulicjack,andwiththeembeddedbracingmembersontheshell

asthethepivots.

2.0.5

Motor-driven(hydraulic)promoteform

专用,

Itisthetechnologythattheconstructioniscarriedoutwithmovingformsatintervalsand

jackingtheoperationplatformandformsbymotorsorhydraulicjacks,andwiththeembedded

bracingmembersontheshellasthethepivots.

2.0.6

Two-sideslidingform

Itisthetechnologythattheconstructionfortheshellandliningiscarriedoutatsametime

withthehydraulicslidingform.

2.0.7

Hydraulicjacking

Itisthemethodtoerectsteelchimneyorsteelfluewithhydraulicjackingequipments,fromthe

toptothebottomanddivisionalbysection.

2.0.8

Hydrauliclifting

Itisthemethodtoerectsteelchimneyorsteelfluewithhydraulicliftingequipments,fromthe

toptothebottomanddivisionalbysection.

2.0.9

Pneumaticjacking

Itisthemethodtoerectsteelchimneyorsteelfluewithpneumaticjackingequipments,from

thetoptothebott人人文库omanddivisionalbysection.

·2·

3BasicRequirments

3.0.1

Thechimneyconstructionprojectmaybedividedintounitorsub-unitworks.Thedivisionalwork

ofchimneyconstructionmaybebrokendowntofoundation,shaft,platform,corrosionresistance,and

ancillaryworksetc.Thetowerreinforcedsteelchimneymaybeseparatedintotwodivisionalworks,the

towerandshaft.Basedonthedifferentchimneytype,theshaftworkmaybedividedintoseveralsub-

divisionalworks.Whenadivisionalworkonlyincludesoneitemizedwork,theitemizedworkshallbe

definedasadivisionalwork.ThedetaileddefininationmaybeinaccordancewithTable3.0.1.

Table3.0.1Definitionofdivisional,sub-divisionalanditemizedworkforchimneyconstruction

SerialDivisionalSub-divisionalItemized

No.workworkwork

EarthworkExcavation,backfill

ReinforcedconcreteBedding,formwork,rebar,concrete,corrosionresistancefor

1Foundationfoundationorpileplatformfoundation

ExpansionfoundationBrickmasonry,stonemasonry,concreteandroughrubble

withoutrebarconcrete专用

ReinforcedconcreteshellFormwork,rebar,concrete

BrickshellBrickmasonry,rebar

Acid-proofbrickmasonry,acid-proofmortarconfiningbed,

Brickinnertube

rebar

2ShellShellfabrication,shellpre-assemblyassemly,welding,shell

Steelshaftorsteelflue

erection

TowerTowerfabrication,towerpre-assemly,welding,towererection

Brickliningandinsulationlayer,castingliningandinsulation

Liningandinsulationlayer

layer,spraypaintingliningandinsulationlayer

SteelplatformSteelplatformfabrication,steelplatformerection,welding

Steelelementfabrication,steelelementerection,welding,profiled

ChimneyCompositeplatform

3steelsheet,rebar,stud,concrete,prefabricatedconcreteelement

platform

Formwork,rebar,concrete,metallicashpitfabricationand

Concreteplatform

人人文库installation

Corrosionresistance

Basesurface,painting

worksofpaintmaterial

Chimneycorrosion

4Corrosionresistance

resistanceAcid-proofbrick,sodiumsilicateacid-proofcementandmortar,

worksofacid-proofbrick

sodiumsilicatelightweightacid-proofconcrete

andsodiumsilicate

ChimneyLadderandplatform,aviationobstaclelight,aviationcolorsign

5-

ancillaryworkspainting,lightningprotectiondevices

3.0.2

Thechimneydivisionalworkshallbecomposedofoneorseveralinspectionbatches.The

inspectionbatchesofeachdivisionalworkshallbedefinedinaccordancewiththerelevant

·3·

provisionsofthiscode.

3.0.3

Thestandardsofqualifiedqualityofinspectionbatchesshallbeinaccordancewiththe

followingrequirements:

1

Qualityofmaincontrolitemsshallcomplywiththerelevantprovisionsofthiscode.When

thequantityforinspectionisnotnoticed,allitemsshallbefullyinspected.

2

Qualityofgeneralitemsshallbequalifiedaftersamplinginspection.Whencountinspection

isapplied,exceptforspecificrequirements,80%andmoreofthetestresultsshallmeetthe

requirementsofstandardsofqualifiedqualityofthiscode,andalsowithoutseriousdefects,orthe

maximumdeviationmustnotexceed1.2timesofthepermittedamount.

3

Havecompleteconstructionoperationbasis,qualityinspectionrecordsandapprovaldocuments.

3.0.4

Thestandardsofqualifiedqualityforitemizedworksshallbeinaccordancewiththe

followingrequirements:

1

Eachinspectionbatchofitemizedworksshallmeettherequirementsofqualifiedquality.

2

Qualitycontroldocumentsshallbecomplete.

3.0.5

Thestandardsofqualifiedqualityfordivisionalandsub-divisionalworksshallbein

accordancewiththefollowingrequirements:

1

Thequalityofeachitemizedworkofdivisionalandsub-divisionalworksshallbequalified

foracceptance.

2专用

Qualitycontroldocumentsshallbecomplete.

3

Thetestandsamplinginspectionresultsrelatedtosafetyandfunctionshallcomplywith

therelevantprovisionsofthiscode.

4

Theacceptancefortheappearancequalityshallmeettherequirements.

3.0.6

Thestandardsofqualifiedqualityforchimneyprojectshallbeinaccordancewiththe

followingrequirements:

1

Thequalityofeachdivisionalandsub-divisionalworksofthechimneyprojectshallbe

qualifiedforacceptance.

2

Qualitycontroldocumentsshallbecomplete.

3

Thesafetyandfunctiontestdocumentsofeachdivisionalandsub-divisionalworksofthe

chimneyprojectshallbecomplete.

4

Theacceptancefortheappearancequalityshallmeettherequirements.

3.0.7

Whenthequalityofchimneyconstructiondoesnotmeettherequirements,itshallbe

processedaccordingtofollowingrequirements:

1

Inspection人人文库batcheswithreworkedorreplacedappliances,equipmentshallbesubjectto

acceptanceagain.

2

TheinspectionbatchthathasbeeninspectedandidentifiedbyaqualifiedInspectionfirmto

meetthedesignrequirements,shallbeaccepted.

3

Theinspectionbatchnotmeetingthedesignrequirementsuponinspectionandidentificationbya

qualifiedinspectionfirm,buthasbeenapprovedbytheoriginaldesignfirmtomeetthestructuralsafety

andservicefunction,maybeaccepted.

4

Thedivisionaloritemizedworkswithrepairorreinforcement,havingdimensionchanged

andmeetingtherequirementsofsafeservice,maybeacceptedaccordingtotechnicalsolutionsand

agreeddocuments.

·4·

3.0.8Whentherepairedorreinforceddivisionalandunitworkscannotreachtherequirementsof

chimneysafeoperation,theacceptanceisrejected.

3.0.9Thereshallbequalifiedcertificateorperformancetestreportfortheconstructionmaterialsof

chimneyproject.Forcement,sand,stone,rebar,admixturesandacid-proofmaterial,there-

examinationreportformainpropertiesshallbesubmitted.There-examinationreportofrebarshallbe

compliedwiththerelevantprovisionsofthecurrentnationalstandardGB50205SteelConstruction

QualityAcceptance.

3.0.10

Thechimneyconstructorshallholdappropriatequalifications.Onsitequalitymanagement

shallincludeappropriateconstructiontechnicalstandards,completequalitymanagementsystem,

constructionqualitycontrolandqualityinspectionregulations.

3.0.11

Thestandardofconstructionqualitycontrolforgeneralclaybrickliningandthebrick

chimneyshell,shallbenotundertheGradeBrequirementsofthecurrentnationalstandard

CodeforAcceptanceofConstructionQualityofMasonryEngineering

GB50203.Thestandardof

constructionqualitycontrolforfirebricklining,corrosionresistanceliningofmasonryandbrick

Code

flue,shallcomplywiththeGradeArequirementsofthecurrentnationalstandardGB50203

forAcceptanceofConstructionQualityofMasonryEngineering

.

专用

人人文库

·5·

4Foundation

4.1EarthworkandFoundationPit

4.1.1

Whenthechimneyexcavationisready,theconstructor,jointingwiththeowner,designer

andsupervisor,shallinspecttheexcavationcentercoordinates,foundationbeddimension,elevation

andlevelness,toidentifywhetherthedesignrequirementsarereached,alsothesoiloffoundation

bedwhethersatisfiesthesoilinvestigationreportthedesignreferred.Whenitisnotsatisfied,the

owneranddesignershallproposesolutions.

4.1.2

Whentheexcavationbottomisbelowthegroundwatertable,basedonthehydrologicand

geologicalconditions,loweringanddrainageworkshallbetakenpriortotheexcavationworks.Alsothe

groundwatertableshallbemaintainedbelowthelowestelevationoftheworkingfield.Meanwhile,

measuresshallbetakentopreventsurfacewaterflowingintotheexcavation.Thecontinuedloweringor

drainageworkshallnotbeceaseduntilthefillingsoilisbackfilledabovethegroundwatertable.

4.1.3Thenaturalsoilsurfaceoftheexcavationbottomshallbeflat.Itisprohibitedtolevelitwith

filling.

4.1.4专用

Aftertheexcavationisaccepted,thefoundationconstructionworkshallcommenceinatimely

manner.Whenthereisalongerinterval,theexcavationshallbere-inspectedpriortotheconstruction.For

individualrecessingpositionsthatarebelowthedesignelevation,maybeleveledwithblindingconcrete.

Whenthebottomsoilisdisturbedorimmersedbywater,itshallbetotallyremoved,andtheblindinglayer

shallbeconstructedhighertoreachthedesignelevation.Whenthebottomsoilisseriouslydamaged,the

constructor,designerandsupervisorshalldeterminetheappropriateremedialaction.

4.1.5

Whenfoundationconstructionworkisfinished,theacceptanceandbackfillworkshallbetakenin

atimelymanner.Thefillingsoilshallbecompactedinlayers.Thecompactionfactorshallmeetthedesign

requirements.Whentherearenodesignrequirements,thecompactionfactorshallnotbelessthan0.92.

4.2ReinforcementSteelBarWorks

4.2.1

ThehookshallbeformedattheendofHPB235rebarwiththelapsplice.Thehookmay

notbenecessaryforHRB335,HRB400andRRB400rebar.Therebarhooksandtheendsoftying

wireshallbeoppositetothecover.

4.2.2

Whenthe人人文库lapspliceisapplied,thelaplengthofrebarshallmeetthedesignrequirements.

Whenthereisnodesignspecification,thelaplengthofrebarshallbe40timesoftherebar

diameter.Whentheweldedspliceisapplied,thesplicedetailandtechnicalrequirementsshall

Specificationfor

complywiththerelevantregulationsofthecurrentnationalstandardJGJ18

WeldingandAcceptanceofReinforcingSteelBars

.

4.2.3

Whenthelengthofverticalrebarofcircumferentialshellisnotlongenough,itshallbewelded,

andmechanicalsplicemaybealsoapplied.Themechanicalspliceofrebarshallcomplywiththerelevant

GeneralTechnicalSpecificationforMechanical

provisionsofthecurrentnationalstandardsJGJ107

SplicingofBarsSpecificationforTaperThreadedSplicingofBars

andJGJ109.

4.2.4

Rebarspliceshallbestaggered.Atoneconnectiondivisional,thenumbersofbarswithlap

·6·

splicesshallnotbemorethan25%ofthetotalamount.Thenumbersofbarswithweldedand

mechanicalsplicesshallnotbemorethan50%ofthetotalamount.

4.2.5

Theinterdivisionalofrebarshallbesolidlytiedwithwire.Forthereinforcementmatofthe

foundationslab,exceptthetotalinterdivisionalsattwoouterrowsshallbefullysolidlytied,

interdivisionalsatthecentralareamaybetiedinastaggeredway.Butitshallbeensuredthatno

displacementfortheload-bearingrebar.

4.2.6

Theverticalrebaroftheshell,whichareinsertedintocircumferentialshell,shallbe

groupedasthedesignrequirements,alsosolidlytiedorweldedwiththefoundationrebar.

Meanwhile,preventativeactionshallbetakenfortherebardisplacement.

4.3FormWorks

4.3.1

Whenthedivisional-installationmethodisappliedfortheformsofcircumferentialshell,

eachformshallbeinstalledatthesamecone-divisionallevel.Theheightdeviationofadjacentforms

shallnotexceed5mm.

4.3.2

Thecontactsurfacebetweenformsandconcreteshallbepaintedwithreleaseagent.The

releaseagentshallnotpollutetherebarsurface.

4.3.3

Thesupportingactionshallbetakenfortheformsinstalledatreservedopeningstoprevent

deformation.Thedesignfortheformsandsupportingatthetopofopeningsshallmeetthesafety

,,专用,

requirementstobeartheself-weightoftheupperconcreterebarformsandsupportingaswellas

theloadscausedbyvibratingconcrete.

4.3.4

Whenthegapbetweenformsislarge,actionsshallbetakentopreventleakageofmortar.

4.4ConcreteWorks

4.4.1

Theconcreteofthefoundationslabshallbeplacedinlayers.Andtheplacingworkshallbe

continuous,andcompletedatonetime.

Whenthecircumferentialshellconcreteisplacing,concreteshallbeuniformlyplacedinlayers

alongthecircumferenceofthecircularshell.Whenthereisanundergroundflue,theconcretefor

bothsidesoftheflueshallbeplacedsymmetrically.

4.4.2

Thepositionsofconstructionjointsforthefoundationshallbeinaccordancewiththe

followingrequirements(Figure4.4.2):

人人文库

Figure4.4.2locationsofconstructionjointsforthefoundation

1-Shell;2-Circumferentialshell;3-Slab;4-Circumferentialbeam;5-Shaft;6-Circularslab;A-AConstructionjoint

·7·

1

Constructionjointsforcircular-shapedandround-shapedslabfoundationsmaybeatwhere

thefoundationslabandcircumferentialshellareconnected.

2

Theconcreteplacingworkfortheshellfoundationshallbecontinuouslycompletedby

horizontallayersatonetime.Andthereshallbenoconstructionjoints.Whentheconstructionis

reallydifficulttocarryout,theconstructorshallconsultwiththedesignerandsupervisorto

determinethepositionsofconstructionjoints.

4.4.3

Theconstructionformassiveconcreteshallbeinaccordancewiththefollowingrequirements:

1

Forthemassiveconcretefoundation,thetemperaturestressofthecoreconcreteshallbe

determinedbycalculation.Themeasuresforconcreteplacingandcuringshallbedeterminedin

accordancewiththecalculationresult.

2

Themixingratioshallbeproperlydesigned.Theefficientplasticizersandmineraladmixturesshall

beadded,andtheamountofcementshallbereduced.Thecontinuousgradingcoarseaggregateshallbe

used.Theclaycontentandfinecontentshallnotexceed1%.Theclaycontentofsandshallnotexceed

3%.

3

ThepozzolanicPortlandcement,slagPortlandcementandthosecementswithlowhydrationand

longsolidificationtimeshallbechosen.

4

Measuresshallbetakentoreducethetemperatureoftheconcretebeingplacedintoforms.

Concretemaybeplacedinlayersorwiththethin-layer-developtechnology.Theconcreteplacing

专用,

timeandpaceshallbecontrolled.Attheconditionofnocoldjointstheplacingareamaybe

expanded,andreducetheconcreteinternaltemperature.Intheprocessofplacing,theroughrubble

maybeadded,whichshallnotbemorethan15%.Thestrengthoftheroughrubbleshallnotbe

lessthanthestrengthofcoarseaggregatesofconcrete.Theroughrubblesurfaceshallbefreeof

dirt.

5

Thetemperatureshallbemonitored.Themeasurementpointsshallnotbelessthanthree

groups.Thereshallnotbelessthanthreemeasurementpointsatdifferentdepthofeachgroup.The

distancebetweeneachgroupshallbedeterminedinaccordancetotheactualsituation.The

monitoringandrecordingworkshallbetakenbyspecificperson.Thetemperaturemeasurement

maybecarriedoutwiththermometersorsensors.Thermometersorsensorsshallbecheckedbefore

use.

Thetemperaturedifferencebetweenthecoreandsurfaceshallnotexceed25℃.Thepaceof

coolingdownshallnotexceed1.5℃/d.

6

Theinsulatingandmoisturizingmethodsshallbetakenforconcretecuring.Thethickness

oftheinsulations人人文库hallbedeterminedbytemperatureparameters.Backfillworkshallcommence

immediatelyafterformsisremoved.

7

Concreteforthecircumferentialshellshallbeplacedduringtheearlycoolingdownperiod

offoundationslabconcrete.

4.5QualityInspection

4.5.1

Thequalitystandardandtheinspectionmethodfortherebarworkofthechimneyfoundation

shallbeinaccordancewithTable4.5.1.

·8·

Table4.5.1Thequalitystandardandtheinspectionmethodfortherebarworkofthechimneyfoundation

Serial

ItemQualitystandard/permitteddeviationUnitInspectionmethod

No.

ShallcomplywithdesignrequirementsandInspectthequality

Rebartype,grade,sizeandrelevantprovisionsofcurrentnationalstandardqualificationapproval

1Codeforacceptanceofconstruction-

quantityGB50204documents,signand

qualityofconcretestructures

testreport

Connectionofthelong-

2Shallmeetthedesignrequirements-Visualinspection

itudinalload-bearingrebar

Maincontrol

items

Themechanicpropertytestshallbe

conducted,thequalityshallcomplywiththe

relevantprovisionsofcurrentnationalstandards

SpecificationforWeldingandAcceptanceInspecttheproduct

3SplicespecimenJGJ18-

ofReinforcingSteelBarsGeneralcertificates,testreport

andJGJ107

TechnicalSpecificationforMechanicalSplicing

ofBars

Shouldbeatwherethebearingloadis专用weaker.

Twoormorethantwosplicesshouldnotbe

Positionandquantityofappliedforthesameverticalload-bearingrebar.Visualinspection

1-

splicesjointsThedistancebetweenthespliceendandthetapemeasurement

startingpointoftherebarbendingshallnotbe

lessthan10timesoftherebardiameter

Shallcomplywithrelevantprovisionsof

Specification

SpliceappearancequalitycurrentnationalstandardJGJ18

2forWeldingandAcceptanceofReinforcing-Visualinspection

SteelBars

General

items

Locationoftherebartied,ShallcomplywiththeprovisionsofthearticleVisualinspection

3-

weldedandmechanicalsplice4.2.3and4.2.4ofthiscodetapemeasurement

4Mainrebarspacing±20

+15

5人人文库Rebarcover

-5

Tapemeasurement,

Thecenter

10mmthespotcheckshall

displacement

Reservednotbelessthan10

6vertical

rebarTheexposed+30

length0

4.5.2

Thequalitystandardandtheinspectionmethodfortheforminstallationworkofthe

chimneyfoundationshallbeinaccordancewithTable4.5.2.Theinspectionamountforgeneral

itemsshallnotbelessthan10.

·9·

Table4.5.2Thequalitystandardandtheinspectionmethodfortheforminstallation

workoftheconcretechimneyfoundation

Serial

Class.ItemQualitystandard/permitteddeviationUnitInspectionmethod

No.

Shallbedesignedinaccordancewith

Formsandthesupporingconditionsofthestructuretype,loadlevel,soil

1structureandreinforcingofthefoundationbed,constructionequipment-Visualinspection

Main

measuresandmaterialsupply,shallbewithsufficient

control

capacityofload-bearing,rigidityandstability

items

AvoidingreleaseagentWhenthereleaseagentispainted,rebarand

2-Visualinspection

pollutiontheconcretecontactsurfaceshallnotbepolluted

1.Thereshallbenoleakageatthejointsof

forms.Beforetheconcreteplacing,thewood

formshallbewettedwithwater,andthereshall

benorecesswaterinsideforms.

2.Thecontactsurfacebetweenformsand

Generalrequirements

1concreteshallbecleanedandpaintedwith-Visualinspection

forforminstallation

releaseagent,Thereleaseagentwhichwillaffect

thestructureperformanceorthed专用ecoration

constructionworkshallnotbeapplied.

3.Priortotheconcreteplacing,debrisin

formsshallbecleaned

Shallbeflatandclean,withoutsettlement,

Qualityoftheterrace

2cracks,sandspotsandbubbleswhichwillaffect-Visualinspection

andmouldusedastheform

theconcretequality

Theheightoftheflueform

+10

3camber(greaterthan

General+5

)

itemstheradius

Thecenteraxis

positionofthe3

embeddedsteelplate

Thecenteraxis

positionofthe

3

E人人文库mbe-embeddedconduit

mmTapemeasurement

ddedandreservedhole

item,

4Thecenter

reser-

Embe-2

axisosition

vedp

dded

itemExposed+10

bolt

length0

Thecenter

10

Reservedaxisposition

opening+10

Size

0

·10·

Table4.5.2(Continued)

Serial

Class.ItemQualitystandard/permitteddeviationUnitInspectionmethod

No.

Therelativedisp-

lacementofthePlumbline,theodo-

10

foundationcentertolite,tapemeasurement

thedesigncoordinate

Theouterradius

ofthebottomslab1%ofouterradius,and≤50

orcircularslab

Theinnerradiusof

thecircumferential1%ofinnerradius,and≤40

Form

Generalshellorshell

5install-mm

ItemsTheflueopening

aton10

centeraxis

Tapemeasurement

Theflueopening

±15

elevation

Theheightand

+20

widthoftheflue

-5

opening

Theheightdiffe-

renceoftheadjacent5专用

form

4.5.3

Thequalitystandardandtheinspectionmethodfortheconcretequalityofthechimney

foundationshallbeinaccordancewithTable4.5.3.Theinspectionamountforgeneralitemsshall

notbelessthan10.

Table4.5.3Thequalitystandardandtheinspectionmethodfortheconcretequalityofthechimneyfoundation

Serial

Class.ItemQualitystandard/permitteddeviationUnitInspectionmethod

No.

Shallcomplywiththedesignrequirements

Thetype,sizeandqualityInspectthequalifi-

andrelevantprovisionsofthecurrentnational

1oftheconcretecomponentCodeforacceptanceof-cationcertificatesand

standardGB50204

materialconstructionqualityofconcretestructurestestreport

Themixingratiodesignshallbeincompliance

withtheconcretestrength,liabilityand

performance,shallcomplywiththerelevantInspectthemixing

2Mixingratiodesign-

provisionsofthecurrentnationalstandardratiodesigndocuments

人人文库SpecificationforMixProportiondesign

MainJGJ55

controlofOrdinaryConcrete

items

Shallcomplywithrelevantprovisionsof

ConcretestrengthandtheCodeforInspecttheconstr-

currentnationalstandardGB50204

3samplingandstoragefortheacceptanceofconstructionqualityofconcrete-uctionrecordsandthe

specimenstructuresspecimentestingreport

Shallcomplywithrelevantprovisionsof

CodeforInspectthescale

DeviationoftheweightofcurrentnationalstandardGB50204

4acceptanceofconstructionqualityofconcrete-certificatesandweigh

eachpanelofrawmaterial

structuresagain

·11·

Table4.5.3(Continued)

Serial

Class.ItemQualitystandard/permitteddeviationUnitInspectionmethod

No.

TherelativedisplacementPlumbline,tape

1ofthefoundationcenterto15measurementortheo-

thedesigncoordinatedolite

Thetopsurfaceelevation

2ofthecircumferentialshell±20Levelinspection

orbeam

3Shellthickness±20

+20

4Shellthickness

-5

Theinnerradiusofthe

51%ofinnerradius,and≤40

circumferentialshellorshell

General

Thelocalityunevennessmm

items

oftheinteriorsurfaceofthe

6circumferentialshellorshell1%ofinnerradius,and≤40

(alongwiththeradius

direction)专用Tapemeasurement

Theouterradiusofthe

71%ofouterradius,and≤50

bottomslaborcircularslab

Thethicknessofthebottom+20

8

slaborcircularslab0

Thecenteraxis15

FlueTheelevation±20

9

openingTheHeight+30

andWidth-10

人人文库

·12·

5BrickChimneyShell

5.1GeneralRequirements

5.1.1

Priortotheshellconstruction,theflatnessofthetopsurfaceofthefoundation

circumferentialshellorbeamshallbeinspected,andshallbeleveledwith1∶2cementmortar.

Thesurfaceflatnessmustnotexceed20mm.Thethicknessofthemortarscreedmustnotexceed

30mm.

5.1.2

Priortotheshellconstruction,thestoreypoleandtheslopescaleshallbeestablished.

5.1.3

Thecentreandradiusoftheshellshallbeinspectedevery1.25mheightduringthe

construction.Andthefounddeviationshallbecorrected.

5.1.4

Intheprocessoftheshellconstruction,onegroupoftestingmortarsampleshallbetaken

onevery5mheight.Whenthemortarstrengthormixingratioischanged,othertestingsamples

shallbetaken.

5.1.5

Thepositions,splicesandanchoragelengthofrebarfortheshellshallmeetthedesign

requirements.

5.1.6专用

Thehoopsinstalledoutsidetheshellshallbelevel.Thesplicepositionsshallbestaggered

alongtheshellheight.Thehoopsshallbepaintedwiththeanti-rustpaintingpriortothe

installation.Intheprocessofinstallation,theboltsshallnotbetighteneduntil40%ofthemortar

strengthisreached,andhoopsshallbeclungtotheshell.

5.1.7

Thethicknessofthebedjoint,onwhichcircumferentialrebarisplaced,shallbe4mm

greaterthantherebardiameter.Aboveandundertherebar,thereshallbe2mmmortarat

least.

5.2MasonryWorks

5.2.1

Theshellofbrickchimneyshallbeconstructedwiththestandardoratypical,firstgrade,

ordinaryclayfiredbrick.Thebrickstrengthshallmeetthedesignrequirements.Whenthereare

frostresistancerequirements,thebrickfrostresistanceperformanceshallmeetthedesign

requirements.Thebricksattheexteriorshellsurfaceshallbefreeofcracks,andtheedgesofone

endshallbeintactatleast.

5.2.2

Whenthe人人文库constructioniscarriedoutatgeneralseason,bricksshallbewettedwithwater

priortotheconstruction.Andthewatercontentshouldbe10%-15%.

5.2.3

Theshellshallbeconstructedwithheaders.Whentheouterdiameteroftheshellislarger

than5m,itmayalsobeconstructedwithstretchersandheadersstaggered.

5.2.4

Whentheshellthicknessisnotlessthanoneandahalfofbricklength,halfbrickmaybe

usedbothinsideandoutside.Butsmallpiecesthatthelengthislessthanthehalfbrickshallnotbe

used.

5.2.5

Thecircumferentialcrossjointsoftheadjacentstoreyshallbestaggeredby1/2ofthe

brick.Thecrossjointsalongtheradiusdirectionshallbestaggeredby1/4ofthebrick.Theatypical

bricksshallbestaggeredby1/2oftheirswidth.

·13·

5.2.6

Whentheordinaryfiredclaybrickiscuttotheatypicalbrickforheader,itshallbecarriedoutat

onesideofthebrick.Thewidthofthemodifiedsmallerheadshallnotbelessthan2/3oftheoriginal

width.Forthefinishedexteriorshellsurface,thestaggeredbrickcornermustnotexceed5mm.

5.2.7

Thebrickstoreymaybelevellyconstructed,orinclinedtothechimneycenter.Theinclination

shallbeperpendiculartotheslopeoftheexteriorshellsurface.Theinclinationofthebrickstoreyshallbe

inspectedfrequently.

5.2.8

Mediumsandshouldbeusedforthesandofthemortar,andshallbesieved.Thereshallbe

norootsandotherdebris.Fortheblendedcementmortarofwhichthestrengthisnotlessthan

M5,theclaycontentofthesandshallnotexceed1%.AndforthestrengthislessthanM5,theclay

contentofthesandshallnotexceed3%.

5.2.9

Themortarmixratioshallbeweightratio.Theconsistencyshallbe80mm-100mm.Themortar

shallbemixedalongwiththeconstructionwork,andshallbealltakenpriortotheinitialset.

5.2.10

Thejointmortaroftheshellmasonryshallbeplump.Themortarplumpnessmustnotbe

lessthan80%.Thegroutingworkmustnotbecarriedoutbypouringwater.Theshellexteriorface

shallbegrouted.Thegroutshouldbe1∶1.5cementgroutmixedwithfinesand.

5.3QualityInspection

5.3.1

Forthebrickchimneyshell,everyheightof10mshallbedefinedasoneinspectionbatch.

5.3.2专用

Thequalitystandardandtheinspectionmethodforthebrickchimneyshellshallbein

accordancewithTable5.3.2.

Table5.3.2Thequalitystandardandtheinspectionmethodforthebrickchimneyshell

SerialQualitystandard/

Class.ItemUnitInspectionmethod

No.permitteddeviation

Shallcomplywith

designrequirements

andtheprovisionsof

Qualityofmaterialsforbrick

thecurrentnationalInspecttheadmissioncertificates

1chimneyshell-

standardGB50203andtestreport

MainCodeforacceptanceof

controlconstructionqualityof

itemsmansoryengineering

Spotcheck3locations,get3bricks

ateachplace,inspectthebonding

2人人文库Mortarplumpness≥80%-

areawiththehundred-gridmesh,

taketheaveragevalue

20m35

Theverticality

TheshellTapemeasurement,plumbline,or

1oftheshell40m50

heighttheodoliteinspection

centeraxis

60m65

General

mm2

itemsSpotcheck10locationsonthe5m

surfacearea,inspectitwiththefeeler

2Thejointthicknessoftheshell10

gauge,thedeviationofthejoint

thicknessisallowed+5mmat5places

·14·

Table5.3.2(Continued)

SerialQualitystandard/

Class.ItemUnitInspectionmethod

No.permitteddeviation

0.15%ofthetotalTapemeasurement

3Theshellheight

shellheightorlevelinspection

1%oftheradiusof

Theradiusofanydivisionalof

4thedivisionaloftheTapemeasurement

theshell

shell,and≤30

Theamo-

Thelocalityunevennessofthe

1%oftheradiusofuntofthespot

Generalinteriorandexteriorsurfaceofthe

5thedivisionalofthemmTapemeasurementcheckshallnot

itemsshell(alongwiththeradius

shell,and≤30belessthan10

direction)

locations

6Theflueopeningcenteraxis15Tapemeasurement

+30Tapemeasurement

7Theflueopeningelevation

-20orlevelinspection

Theheightandwidthoftheflue+30

8Tapemeasurement

opening-20

Notes:1Thevalueofthepermittedverticalitydeviationoftheshellcenteraxismeansthepermitteddeviationatthedifferent

elevationofonechimney.专用

2Themeaniscalculatedbytheinterpolationmethod.

人人文库

·15·

6ReinforcementConcreteChimneyShell

6.1GeneralRequirements

6.1.1

Toconstructtheshellofthereinforcedconcretechimney,basedontheactualsituation,the

motor-driven(hydraulic)promotingformwork,slip-form,mobilerelocatingformworkorother

technologymaybeapplied.

6.1.2

Whentheslip-formtechnologyisappliedfortheconstruction,notonlytherelevant

TechnicalCodeof

provisionsofthiscode,butalsothoseofthecurrentnationalstandardGB50113

Slip-formEngineering

shallbecompliedwith.

6.1.3

Whentheslip-formtechnologyisappliedfortheconstruction,theshellthicknessshouldnotbe

lessthan160mm.Whenthemotor-driven(hydraulic)promotingformworkormobilerelocatingformwork

technologyisappliedfortheconstruction,theshellthicknessshouldnotbelessthan140mm.

6.1.4Whentheslip-formtechnologyisappliedfortheconstruction,theconcreteshallnotslump

withformsremoved,aswellasnosplit.Theconcretestrengthwithformworkremovedshallnotbeless

than0.2MPa.

6.1.5Whenthemotor-driven(hydraulic)promotingformwork专用technologyisappliedforthe

construction,thestrengthofload-bearingconcreteshallbedeterminedbythecalculationinaccordance

withtheloadsontheplatform.Whenitisbelowthecalculatingvalue,theplatformmustnotbelifted.

6.1.6

Theload-bearingformsattheflueopening,dooropeningsandhopperplatformsetc,shall

notberemoveduntiltheconcretestrengthreachestherequirementsofthecurrentnational

CodeforAcceptanceofConstructionQualityofConcreteStructures

standardGB50204.

6.1.7

Intheprocessofthechimneyconstruction,thesettlementmonitoringpointshallbeestablished.

Thefirstsettlementmonitoringshallbecarriedoutafterthepointisready.Thesettlementmonitoring

shallbecarriedoutattheheightofevery50mintheprocessofconstruction.Afterthecompletionofthe

shellconstruction,themonitoringworkshallbecontinuedaspertheprovisionsofthecurrent

CodeforDeformationMeasurementofBuildingandStructure

nationalstandardJGJ8.

6.2ReinforcingSteelBarWorks

6.2.1

Therebarendsandsplicesshallcomplywiththeprovisionsofthearticle4.2.1-4.2.4of

thiscode.人人文库

6.2.2

Theverticalrebarshallbeinstalleduniformlyalongthecircumferentialshell.Atthe

operationplatformswherethebeamsarealongtheradiusdirection,therebarspacingmaybe

properlyincreased.Thecircumferentialrebarshallbeinstalledontheoutsideoftheverticalrebar.

6.2.3

Whentheshellradiusandheightischanged,thediameterandamountoftheverticalrebar

shallbeadjustedinaccordancewiththedesignrequirements.Theadjustedrebarspacingshallnot

exceedthedesignrequirements,andshallbeuniformlyarrangedalongthecircumferentialshell.

6.2.4

Theverticalrebarextendedtotheformworksshallbetemporallyfixed.Aboveeveryplaced

concretelayer,thereshallbeonegroupwelltiedcircumferentialrebaratleast.

6.2.5

Thelengthofthesupportingmembersoftheslipformsshouldbe3m-5m.Thereshallbe

·16·

morethanfourdifferentlengthsforthesupportmemberinstalledatthefirst.Theadjacentheight

differencemustnotbelessthan20timesofthesupportmemberdiameter.

6.2.6

Thesplicesofthesupportingmembersoftheslipformsshallbesolidlyconnected.The

supportingmembersshallbespotweldedwiththeshellcircumferentialrebaratintervals.The

splicesofthecircumferentialrebarshallbewelded.

6.2.7

Intheprocessofslidingup,thesupportmembersshallbeinspectedregardingtheincline

issue.Whenthesupportmembersareunstableorjackedbythejack,actionsshallbetakentosolve

theproblemsinatimelymanner.

6.2.8

Whenformworkspassthroughthehighflueopenings,daylightwindowsandarehungin

theair,exceptforreinforcingthesupportingmembers,othersecuremeasuresshallbetaken.

6.2.9

Whentheslip-formtechnologyisappliedfortheconstruction,thestructureload-bearing

rebarmaybereplacedbythesupportingmemberatequalstrength.Thesplicestrengthshall

TechnicalCodeofSlip-

complywiththeprovisionsofthecurrentnationalstandardGB50113

formEngineering

.

6.3FormWorks

6.3.1Formworksandthesupportingstructuresmustmeettherequirementsofload-bearingcapacity,

rigidityandstability.

6.3.2专用

Whentwistingishappenedtotheslipformintheprocessofsliding,thecorrectiveactions

shallbetakeninatimelymanner.Thecircumferentialtwistingshallbecalculatedinaccordance

withthearclengthoftheshellexteriorsurface,anditmustnotexceed100mmwithinany10m

height,aswellas500mmwithinthefullheight.

6.3.3

Whenthecenteroftheslipformisdeviated,itshallbegraduallycorrectedinatimely

manner.Whentheinclinationoftheoperationplatformisappliedtocorrectthecenterdeviation,the

inclinationshallbecontrolledwithin1%.

6.3.4

Whenthemotor-driven(hydraulic)promotingformworktechnologyisappliedforthe

formworkinstallation,thefixingscrewrodshallbeinstalledontheinteriorandexterior

formworks.Thespacing,size,andlocationofthescrewrodshallbedeterminedbythecalculation.

Theupperandlowerformworksshouldbeconnectedwiththeinsertionmethod.Thesupporting

membersshallbeinstalledattheformworktop.Theshrinkingsub-formworkshallbeinstalledon

bothinteriorandexteriorformworks.Theexteriorformworkshallbetiedtightly.Thegapsshallbe

wellsealed.Theinteriorformworkshallbebracedsolidly.

6.3.5

Whenthe人人文库motor-driven(hydraulic)promotingformworktechnologyisappliedforthe

construction,thecenterdeviationoftheplatformsystemshallbeinspectedwiththeeverylifting.

6.4ConcreteWorks

6.4.1

TheconcretefortheshellshouldbetheproductionofordinaryPortlandcementorslag

Portlandcementwiththesameonesupplier,typeandstrength.Whentheaveragetemperatureis

below10℃,slagPortlandcementmustnotbeused.Themaximumcementamountofeverycubic

meterconcreteshallnotexceed450kg,andthewatercementrationshouldnotbegreaterthan

0.5.Theplasticizershouldbeaddedtotheconcrete.

6.4.2

Theadmixturesandadditivesthatimproveconcreteperformanceshallcomplywiththerelevant

·17·

provisionsofcurrentnationalstandardsGBJ146TechnicalCodeofFlyAshConcreteApplication,and

JGJ56WaterReducingAdmixtureUsedforConcrete-QualityRequirementsandTestingMethods.

6.4.3

Thesizeofconcretecoarseaggregateshallnotbegreaterthan1/5oftheshellthicknessand3/4

oftheclearrebarspacing.Themaximumsizeshallnotexceed60mm.Themaximumsizeshallnotexceed

40mmwhenconcreteispumped.Thecontinuousgradingcoarseaggregateshouldbechose.

6.4.4

Withinthe10mheightsatthetopofthesinglefluechimney,andforthecircumferential

cantileverconstructedwithtwo-sideslidingformworkormasonry-insidesliding-outside

technology,limestoneshouldnotbeusedascoarseaggregate.

6.4.5

Whentheslip-formtechnologyisappliedfortheconstruction,concreteshallbeuniformly

placedinlayersalongthecircumferentialshell.Thethicknessofeachlayershouldbe250mm-

300mm.Whentheupperconcreteisplacing,theplacingdirectionshallbeshiftedsymmetrically.

Whenthemotor-driven(hydraulic)promotingformworktechnologyisappliedfortheconcrete

placing,theplacingworkmaybecommencedfromonepoint,andcircumferentiallycontinuedin

bothdirectionstilltheclosurereached.Thestartingpointoftheconcreteplacingworkfortwo

adjacentshelldivisionalsshallbestaggeredby1/4oftheperimeterlength.

6.4.6

Whentheslip-formtechnologyisappliedfortheconstruction,thesupportingmembers,

rebarandformworksshallnotbetouchedbythevibratorwhichisforvibratingtheconcrete.The

penetratingdepthofthevibratorshallnotexceed50mmofthepreviousconcretelayer.When

,专用

formworksarebeingliftedconcretemustnotbevibrated.

6.4.7

Constructionjointsshallbereducedintheprocessoftheshellconstruction.Regardingthe

workforconstructionjoints,looserockshallberemovedatfirst,andthejointshallbecleanedand

saturatedwithwater,then20mm-30mmthickcementmortarlayershallbeplacedwhichhasthe

samecomponentsoftheconcreteslurry,thenthetopconcreteshallbecontinuouslyplaced.When

theconcreteandrebararepollutedbyoil,cleaningworkshallbeconducted.

6.4.8

Whenthetwo-sideslidingformworktechnologyisappliedfortheconstruction,actions

shallbetakentoensurethethicknessoftheshellandlining,andpreventtheinterpenetrationand

confusionoftheshellandliningconcrete.

6.4.9

Intheprocessofthechimneyconstruction,onegroupofconcretespecimensshallbetakenatthe

3

heightofevery10m.Whentheconcreteamountisgreaterthan100matthe10m,onegroupofconcrete

3

specimensshallbetakenatevery100m.Whenitisnecessarytotestthestrengthofotherperiodsorthe

rawmaterial,mixingratioischanged,otherconcretespecimensshallbetaken.Thefabrication,

curingandinspectionworkofconcretespecimensshallbecarriedoutbyspecificperson.Inthe

processofthecons人人文库truction,specimenswiththesameconditionsshallbekept.

6.4.10

Thecuringliquidmaybeappliedfortheshellconcretecuring.

6.5QualityInspection

6.5.1

Forthereinforcedconcretechimneyshell,everyheightof10mshallbedefinedasone

inspectionbatch.

6.5.2

Thequalitystandardandtheinspectionmethodfortheformworkinstallationworkofthe

reinforcedconcretechimneyshellshallbeinaccordancewithTable6.5.2.Theinspectionamount

forgeneralitemsshallnotbelessthan10.

·18·

Table6.5.2Thequalitystandardandtheinspectionmethodfortheformworkinstallation

workofthereinforcedconcretechimneyshell

Serial

Class.ItemQualitystandard/permitteddeviationUnitInspectionmethod

No.

Cornersshallbesquare,surfaceshallbe

Formworkappearance

1flat,norollededges,notbebuckled,no-Visualinspection

quality

holesandburrsetc

Shallcomplywithprovisionsof

MainTechnicalCodeofComposite

2SteelformworkdimensionGB50214-Tapemeasurement

controlSteel-formwork

items

Deviationofthebench

Lasertheodolite

3markandtheleadingpoint5

mmorplumbline

ofthechimneycenter

4Theradiusofanydivisional±20Tapemeasurement

1CleaninginsideformworksCleanandfreeofdebris-Visualinspection

ThecontactsurfaceofNostickyslurry,thereleaseagentis

2-Visualinspection

theformtoconcreteuniformlypainted

Theradiusdifferenceofthe

310Tapemeasurement

innerandouterformwork专用

TheheightdifferenceofStraightandwedge

43

theadjacentformworkfeelergaugeinspection

Theelevationdifferenceof

Levelandtape

5thetopoftheformworkat20

measurement

thesamestorey

ThecamberofthereservedShallmeetthedesignrequirementsor

6LTapemeasurement

opening(≥4m)1‰-3‰ofthewholespanmm

Thelevelnessofthebrace

71%Straight

installation

General

itemsThecenterTheodoliteandtape

10

Reservedaxismeasurement

holesTheLevelandtape

8±15

andflueelevationmeasurement

openingDivisional+15

Tapemeasurement

人人文库size0

ThecenteroftheembeddedLevelandtape

910

ironitemmeasurement

ThecenteroftheembeddedTheodoliteandtape

1020

concealeddovetailmeasurement

ThecenteroftheembeddedTheodoliteandtape

113

boltmeasurement

Theexposedlengthofthe+20

12Tapemeasurement

embeddedbolt0

·19·

6.5.3

Thequalitystandardandtheinspectionmethodfortherebarinstallationworkofthe

reinforcedconcretechimneyshellshallbeinaccordancewithTable6.5.3.Theinspectionamount

forgeneralitemsshallnotbelessthan10.

Table6.5.3Thequalitystandardandtheinspectionmethodfortherebarinstallation

workofthereinforcedconcretechimneyshell

Serial

Class.ItemQualitystandard/permitteddeviationUnitInspectionmethod

No.

ShallcomplywithdesignrequirementsandtheInspectthequality

Rebartype,grade,provisionsofthecurrentnationalstandardGB50204qualificationapproval

1Codeforacceptanceofconstructionqualityofconcrete-

size,quantityandqualitydocuments,signand

structures

testreports

Connectionofthe

2longitudinalload-Shallmeetthedesignrequirements-Visualinspection

bearingrebar

Main

Inspecttheappea-

controlShallcomplywiththeprovisionsofthecurrent

SpecificationforWeldingranceandthetesting

items3RebarweldingqualitynationalstandardJGJ18-

andAcceptanceofReinforcingSteelBarsreportofthesplice

mechanicproperty

Themechanicpropertytestshallbeconducted专用,the

qualityshallcomplywiththeprovisionsofthecurrent

SpecificationforWeldingInspectthetesting

nationalstandardsJGJ18

4SplicespecimenandAcceptanceofReinforcingSteelBars-reportofthesplice

,andJGJ107

GeneralTechnicalSpecificationforMechanicalmechanicproperty

SplicingofBars

Shallbesmoothandstraight,clean,nodamage,oil

1Rebarsurfacequalitystain,paintingpollution,sheetagingrustandvoids,no-Visualinspection

deformation

LocationoftherebarSplicejointsshallbestaggered.Atoneconnection

Visualinspection,

2mechanicalandweldeddivisional,thenumbersofthespliceshallnotbemore-

tapemeasurement

splicethan50%ofthetotalrebaramount

Theadjacanttiedlapsplicesfortheload-bearingrebar

shallbestaggered.Atoneconnectiondivisional,the

numbersofthespliceshallnotbemorethan25%ofthe

LocationoftheVisualinspection,

General3totalrebaramount.Theoverlaplengthshallcomplywith-

rebartiedlapsplicetapemeasurement

items人人文库designrequirementsandtheprovisionsofthecurrent

Codeforacceptanceof

nationalstandardGB50204

construc