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1、..word教育资料..KarumaHydropowerPlantandAssociatedTransmissionLineWorksManualForConcreteDefectsRepairingOfTRTLiningRef:M-GE-GE-005(Revision0)THEEMPLOYER:THEEPCCONTRACTOR:THEGOVERNMENTOFREPUBLICOFUGANDA,SINOHYDROCORPORATIONLIMITEDREPRESENTEDBYTHEMINISTRYOFENERGYANDMINERALDEVELOPEMENTOctober,2016wo
2、rd教育资料..CONTENT1.Purpose12.MainDefectsofConcreteWorks13.MajorTechinicalMeasuresForRepairing13.1Dislocation13.2GroutLeakage23.3HoneyComb23.4PittedSurface23.5Cavity23.6LocalDepressionandGroove33.7ReinforcementExposure33.8CrackandColdjoint43.9ProtrudedReinforcementEnd54.QualityControl5word教育资料..
3、1.PurposeToinsureconcretequalityshallmeetstandardandcontractrequirementsafterconcreterepairingprocedures.2.MainDefectsofConcreteWorksCommondefectsmaybeoccurinconcreteworksmainlyincludedislocation,groutleakage,honeycomb,pittedsurface,cavity,localdepressionandgroove,reinforcementexposure,coldjo
4、int,cracks,protrudedreinforcementendandsoon.3.MajorTechinicalMeasuresForRepairingOncethetypeofthedefectisidentified,relativespecial-assignedpersonnelwillbearrangedtotreatthevariousdefectsoccurindifferentconstructionpositions.3.1DislocationRepairmethodsfordislocationmainlyincludechiselingandpo
5、lishing,thenbackfilledwithequivelentstrenthastheconcrete.Differentmethodswillbeadoptedaccordingtodifferentsituation.1)Ifthedislocationisnotmorethan20mm,grindingmachineshallbeusedforpolishingthesurfacetoformaslopeof1:10.2)Ifthedislocationismorethan20mm,pneumaticpickshallbeusedtotrimthesurfacet
6、oformaslopeof1:10.3)Ifonlyappearancerequirement,fineaggregateconcreteormortarwhichisonegradehigherthantheoriginalconcreteshallbeusedforcompactingandlevelingthesurface.word教育资料..1.1GroutLeakageTheleakedgroutshallbecleanedaway.Ifinsomepositions,it’shardtoremovethegroutingartificially.Insuchport
7、ions,grindingmachinewillbeusedforpolishingandtrimingthesurfaceandthenusehighpressurewatertoflushthesurface.1.2HoneyCombTochipawaytheloosematerialinthehoneycombartificiallyorbypneumaticpick,andthenusehighpressurewaterflushthesurface.Fineconcre
