埋地给水钢管道水泥砂浆衬里技术标准.docx

埋地给水钢管道水泥砂浆衬里技术标准.docx

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埋地给水钢管道水泥砂浆衬里技术标准

埋地给水钢管道水泥砂浆衬里技术标准

Technicalstandardforcementmortarliningforburiedsteelpipeline

StandardofChinaConstructionStandardizationAssociation

Technicalstandardforcementmortarliningforburiedsteelpipeline

CECS10:

89

Editorinchief:

BeijingmunicipaldesignandResearchInstitute

Approvalunit:

ChinaAssociationforstandardizationofengineeringconstruction

Dateofapproval:

November27,1989

Preface

Forburiedsteelwaterpipelinecementmortarliningtechnology,inrecentyearsinthedomesticengineeringhasbeenwidelyusedandhasmatureexperience.Thewatersupplypipewallusingcementmortarlining,notonlycanpreventtheinternalcorrosionofthepipescale,prolongtheservicelife,andcanprotectthewaterquality,maintainorimprovethetransportationcapacityofpipeline,energysaving,hasobviouseconomicbenefitsandsocialbenefits.Inordertomeettheneedsofdesignandconstructionandensurethequalityoftheproject,thisstandardisspeciallymade.Thisstandardreferstotheachievementsofscientificexperimentsathomeandabroad,combineswithengineeringpracticeandseekstheopinionsofexpertsandunitsconcerned,andhasbeenexaminedandapprovedbytheNationalTechnicalCommitteeforpipelinestructurestandards.

ThetechnicalstandardforcementmortarliningofburiedwatersupplysteelpipeisherebyapprovedandisnumberedCECS10:

89,andrecommendedtotheengineeringconstructionandconstructionunits.Intheprocessofusing,adviceandinformationpleasesendtoBeijingYuetanNanStreetCommitteestructurenationalstandardBpipelinetechnologyNo.2（postencoding:

100045）.ChinaAssociationforstandardizationofengineeringconstruction

November27,1989

Catalog

ChapterIGeneralProvisions

Secondchaptermaterials

Thethirdchapterconstructionregulations

Section1GeneralProvisions

Secondsectionliningmaterialpreparation

Constructionandmaintenanceofthirdsectionlining

Thefourthchapter,liningqualityinspectionstandardandmethod

Thefifthchapterrepairs

Appendixtothestandardwording

Additionalinstructions

ChapterIGeneralProvisions

Article1.0.1toprolongtheservicelifeofthepipelineforburiedwater,protectwaterquality,maintainorimprovethetransportationcapacityofpipeline,toensurethequalityofcementmortarlining,thespeciallyformulatedstandards.

Article1.0.2Thisstandardappliestonominaldiameter500mmandaboveneworhavebeenbuiltforburiedsteelwaterpipeline.

Thewaterconveyingpipeshouldbeconsistentwiththe"surfacewaterenvironmentalqualitystandard"（GB3838-88）or"sanitarystandardfordrinkingwater"（GB5749-85）requirements.Watertemperatureshallnotexceed60degreescentigrade.

Article1.0.3thisstandardappliestotheconstructionprocessofmechanicalsprayingonsite.Whenthepipediameterisgreaterthan1000mm,ifthereisnomechanicalsprayingequipmentandhavemanualpaintingexperience,allowedtohandpainted.

Article1.0.4thequalityindexoftheliningsurfaceasspecifiedinthisstandardisaccordingtotheroughnesscoefficientofthelining,andthenvalueisnotgreaterthan0.

012ofthestandardsset.

Secondchaptermaterials

Article2.0.1liningcementshouldbeusedinPortlandcementandordinaryportlandcementandPortlandslagcement,andshallcomplywiththenationalstandard"Portlandcementandordinaryportlandcement（"GB175-85"）,slagPortlandcement,volcanomarlyPortlandcementandPortlandfly-ashcement"（GB1344-85）regulations.Cementismarked426or525.

Article2.0.2sandparticlesmustbehard,cleanandwellgraded.Thequalitystandardandinspectionmethodshouldbeinaccordancewiththe"ordinaryconcretesandqualitystandardandinspectionmethod"（JGJ52-79）,sandclay,mica,organicimpuritiesandotherharmfulsubstancesshouldnotexceed2%ofthetotalweightofthetotalweight.

Sandshouldbeallthrough1.19mmsieve（14mesh）,the0.297mm（50meshsieve）shouldnotexceed55%,through0.149mmsieve（100mesh）shouldnotexceed5%.

Applyscreenselectionbeforeuse.

Article2.0.3waterqualitymustbecleanandshallnotcontainsubstancessuchasclay,oil,acid,alkaliandorganicsubstancesthataffectthequalityofmortarlining.Drinkingwatershouldbeadopted.

Article2.0.4inordertoimprovetheworkabilityofmortarandthecompactnessandbondstrengthtoadditive,mustbedeterminedthroughtests,theharmfuleffectonthewaterpipeandthecorrosionofsteelliningmortaradmixturesshall.

Thethirdchapterconstructionregulations

Section1GeneralProvisions

Article3.1.1cementmortarliningconstructionmustbecompletedinthepipelinelaying,testpressurequalified,andaccordingtothedesignrequirementsofsoilcompaction,liningconstructionprocess,thepipelinemustbeinastablestate.

Article3.1.2theliningshallbecheckedbeforetheconstructionofthedeformationstatus,themaximumverticaldisplacementshouldnotbegreaterthanthedesignrequirements,andshallnotbegreaterthan2%ofthepipediameter.

Article3.1.3liningconstruction,theinnerwallofthepipemustbecleaned,thenewlylaidpipelineshouldremovelooseoxidescale,rust,dirt,grease,weldingslag,dirtandotherattachments,weldsteelpipewallbulgeheightisgreaterthanthethicknessoftheprovisionsoftable3.3.11/3,theoldpipelineshouldberemovedrust,scaleandotherattachments.Afterremovaloftheattachment,applywatercleaning.Theliningofthepipeshallbefreeofcondensationandwaterwhenlining.

Secondsectionliningmaterialpreparation

Article3.2.1cementmortarmustbemechanicallymixedandstirred.Theconsistencyofthemortarshallbeinaccordancewiththeuniformdensityofthelining.Mortarshouldbeusedbeforeinitialsetting.

Article3.2.2theweightratioofcementmortarin1:

1to1:

2intherangeofselectionofcementmortarslumpshouldbe60~80mm,whenthediameterislessthan1000mm,allowingincreased,butnotmorethan120mm.

Thefirst3.2.

3cementmortarcompressivestrengthshallnotbelessthan30MPa.

Constructionandmaintenanceofthirdsectionlining

Article3.3.1liningthicknessandpermissibletolerancesofvariousdiameterscanbeusedasshownintable3.3.1.

Whenhandpainted,theliningthicknessspecifiedintable3.3.1shallbepaintedseparately.

Nominaldiameter

（mm）liningthickness（mm）,thicknesstolerance（mm）;

Mechanicalspraying,handpainting,mechanicalspraying,handpainting

500~70082

2

800~1000102

2

1100~150012143

23

2

1600~180014163

23

2

2000~220015174

34

3

2400~260016184

34

3

Morethan260018204

34

3

Article3.3.2whenusingmechanicalsprayingprocess,thepipeneartheelbow,threespecialfittingsandtheadjacentgatecanbeappliedbyhand,andtothesmoothtransitionandmechanicalsprayinglining.

Whenthepipeliningcementmortarreachesthefinalsetting,itmustbeimmediatelywateredandmaintained,andthemoisturecontentoftheliningshouldbemorethan7d.WhenusingslagPortlandcement,keepwetstateshouldbeabove10d.

Duringmaintenance,alltheholesinthepipesectionshallbetightlyclosed.Whenthecuringperiodisreached,watershouldbefilledintime,orthemaintenanceshouldbecontinued.

Thefourthchapter,liningqualityinspectionstandardandmethod

Article4.0.1cementmortarliningthicknesscanbemeasuredbydrillingmethodorthicknessgauge.Whenthethicknessgaugeisused,thetestershallbeverifiedbythetestingdepartment,andtheallowabletolerancesshallbespecifiedintable3.3.1.

Whenthediameterisgreaterthanorequalto800mm,each100mlongpipeinspectionin2sections,eachsectionshouldbemeasuredby2points,ifthe1pointsarenotqualified,andthenchecksthe4sections,suchastherearestill2pointsisnotqualified,thedetectionsectionisnotqualified.Pipeswithadiameteroflessthan800mmaredesirabletobedetectedatbothendsofthepipesection.Thetestingstandardsshallbethesameasabove,andthelengthofeachsegmentshallnotexceed500m.

Thefirst4.0.

Surfacesmoothnessof2cementmortarlinings.Thegapbetweentheliningsurfaceandtherulercanbemeasuredbyusingthe300mmrulerparallelpipeaxis.

Thediameterof800~2000mm,each100mpipesample10,thegap9shouldbelessthan1.6mm,ifnotmet,thenchouce20,ofwhich18ofthegapshouldnotbemorethan1.6mm;thediameterislargerthan2000mm,thegapshouldnotexceed2.0mm,thedetectionmethod,otherwisenotqualified.

Thepipediameterislessthan800mm,closetothetubesectionattheendsofdesirabledetection,detectionofeachendof4,thegap3shouldbelessthan1.6mm,ifnotmet,thenthedetectionof4,thegap3shouldbelessthan1.6mm,otherwiseunqualified.Thelengthofeachsegmentshallnotexceed500m.

Article4.0.3surfaceroughnessofcementmortarlining.Whenmechanicalsprayingconstruction,comparewiththetemplate;whenhandpaintingconstruction,tofeelsmooth,nosandsensetest.Whenitisconsideredthattheactualnvalueneedstobedetected,theflowtestcanbecarriedoutafterthepipelinehaspassedthroughthewater.

Article4.0.4cementmortarliningcrackscausedbyshrinkage,whenitswidthislessthanorequalto1.6mm,andalongthepipelineaxiallengthisnotgreaterthanthecircumferenceoftheconduitandthelengthofnotmorethan5mcannotrepair.Whenthecrackwidthisgreaterthan1.6mm,thecrackscanbeautomaticallyhealedafterstrengtheningmaintenance,whichcanbeconsideredqualified.

Article4.0.5cementmortarliningsurfacedefects（pits,sandhole,emptynestetc.）everysingleshallnotbegreaterthan5cm2,thedepthofthedefectacc