混凝土上部结构施工方案 Method Statement for Concrete Works Superstructures.docx
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混凝土上部结构施工方案 Method Statement for Concrete Works Superstructures.docx
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混凝土上部结构施工方案MethodStatementforConcreteWorksSuperstructures
METHODSTATEMENTFOR
CONCRETEWORKS-SUPERSTRUCTURE
RevisionRecord
1.Thiscoverpageisarecordofallrevisionsofthedocumentidentifiedabovebynumberandtitle.Allpreviouscoverpagesareherebysupersededandaretobedestroyed.
2.Thecontractorhasthefullrighttomodify,amendorchangeMethodStatementandsupportingdocumentsasrequiredorasdeemednecessary.Allsuchdocumentswillbesubmittedtothe“CONSULTANT”forapproval.
Rev
Date
Prepared
By
Reviewed
by
Approvalfor
Issuanceby
Description&pageNumberofRevision
CONTENTS
1.0PURPOSE
2.0SCOPE
3.0REFERENCES
4.0DEFINITIONSANDABBREVIATIONS
5.0RESPONSIBILITIES
6.0MATERIALS
7.0EQUIPMENT&TOOLS
8.0SAFETY&HEALTH
9.0PROCEDURE
10.0ATTACHMENTS
1.0PURPOSE
ThepurposeofthisdocumentistolaydownthesystematicproceduresforthevariousactivitiesrequiredforCONCRETEWORKS-SUPERSTRUCTURE(CASTIN-SITU)toensurethatallworksarecarriedoutinaccordancewiththeapprovedshopdrawingsandprojectspecification.
2.0SCOPE
Thisprocedurecoverallactivitiesrelatedtoconcretingsuperstructure:
ØShuttering
ØReinforcement
ØConcretepouring
ØConcretefinishing
ØConcretecuring
3.0REFERENCES
ØProjectSpecificationsforCastinPlaceConcrete
ØApprovedshopdrawings
ØApprovedreinforcement
ØMaterialapproval
ØApprovedmixdesignandtrialmixdetails
ØContractDrawings
ØApprovedsupplierdetails
ØProjectQualityPlan
ØProjectHSEPlan
4.0DEFINITIONS&ABBREVIATIONS
Consultant/Client:
Contractor:
PM:
ProjectManager
CM:
ConstructionManager
PE:
ProjectEngineer
SE:
SiteEngineer
QCE:
QualityControlEngineer
QAQC:
QualityAssuranceandqualityControl
PPE:
PersonalProtectiveEquipment
HSE:
Health,SafetyandEnvironment
5.0RESPONSIBILITIES
ØProjectManagerisresponsibleforoverallprojectexecution,qualityandsafety.AdoptaleadingrolewithrespecttoContractor’squalityandsafetyprocedures.ThePMisresponsiblefortheoverallimplementationofthismethodstatement.TheProjectManagershallensurethatthekeypersonnelarewellawareofthespecificationsandmethodstatement.
ØCM/ProjectEngineershallarrangeallmaterials,equipment,safetyrelateditems&manpower&directtheSiteEngineers&Forementoresortappropriateactionforthesmoothexecutionoftheworks.
ØSafetyEngineershallberesponsibleforsafeworkingenvironment&conditions.CoordinatewithSiteEngineertoidentifypotentialhazardsbeforeworksandadvicemethodsofsafeworkingfromnewdevelopments.
ØSurveyorshallberesponsibleforsettingoutforlevels,layout,andlines&establishtoplevels.Ensuringsettingoutbooksareproperlymaintainedandfiledwhencompleted.TocoordinatewiththeCONSULTANTsurveyorindeterminingcoordinates,levels,andlimits.
ØQA/QCEngineershallberesponsibleforensuringthatexecutionofworksarecomplyingwithapprovedmethodstatement;specifications,approvedshopdrawingsandensureITRaresubmittedbasedonITPrequirements.
ØSiteEngineershallensurethatallworksarecarriedoutaccordingtoapprovedshopdrawings.Heshalldirectthesurveyorforthesettingoutlines&levelsinconcurrencefromtheConstructionManager/SeniorCivilEngineer.
ØMEPCoordinator/EngineershallberesponsibleforproperexecutionofMEPworksinvolvedbefore,duringandaftertheworks.
6.0MATERIALS
ØAspertheapprovedmaterialsubmittal.
7.0EQUIPMENTS&TOOLS
ØVibrators
ØConcretePumps
ØChute
ØCrane
ØTransitMixtures
ØGenerator-Fornightconcreting
ØAircompressor
ØHandtools,handsaw,wirecutter,brush,
ØLinedory
ØMeasuringtapes
ØTamper
ØShovel
ØWoodenFloat
ØPowerfloat
ØCalibratedsurveyinstruments
Thecapacity/sizeoftheabovetoolsandequipmentshallbejudgedinaccordancewithsiteconditions,requirements,andavailabilityatthetimeofexecution
8.0SAFETY&HEALTH
Safetyofthepersonnelandpropertiesistobegivenprimeimportanceandalltheworkstobecarriedoutwithoutcausinganyaccidentsorpropertydamages.Concreteworksinvolvesthefollowingactivities.
1.Shutteringandde-shuttering
2.Fabricatingandfixingreinforcement.
3.Transportationofconcrete.
4.Placingofconcreteatsite
HSErulesandregulationsshallbestrictlyadheredduringexecutionoftheabovementionedworks.
Adequateaccessandegressshouldbeprovidedtothesiteofwork.Allthepersonnelshouldwearbasicpersonnelprotectiveequipments.Alltheequipments,toolsandtacklesbeingusedfortheworkshouldbeingoodworkingconditionandmaintained.Allthepersonnelwillbeprovidedwithtoolboxtalkontheprocedurestoexecutetheworksafely.
Necessaryriskassessmentoftheactivitiesisreflectedintheenclosedriskassessment.
9.0PROCEDURE
General:
ØPriortostartanyactivityonsite,theEngineermustbenotified.
ØEnsurethatallworkersareawareoftheevacuationplan.
ØCordonofftheworkareatopreventunauthorizedentry.
ØDiscussthemethodofworkingwithallsupervisionstaff.
ØAlltherelateddocumentssuchasshopdrawings,methodofstatements,materialapprovals,subcontractor’sapprovals,testcertificatesetc.mustbeapprovedandavailableuponrequest.
ØEnsurethesourceofsupplyofreadymixandgradeofconcrete.
ØArrangeinitialtrialmixandconductspecifiedtest.
ØSubmitmixdesignandtrialmixtestresultforClient/Engineerapproval.
ØSitelabwithcubemould,Thermometer,Slumpconeetcshallbearrangedpriortotheconcretingoperation.
ØSpacerblockshallbeprovidedasperapprovedmaterial.
ØArrangetheconcretetestingareawithpropershading/andlighting.
ØPolythenesheets,hessianclothssweetwateretcshallbearrangedforthepropercuring.
ØAccessscaffoldings,ladderetc.willbeerectedtoallowreinforcementtobefixed.
ØSettingout,MEPclearanceandcivilworkapprovalshallbeobtainedpriortoproceeding.
Formworks.
ØSettingoutshallbedonebythesurveyorpriortoproceeding.
ØFormworkshallbeerectedasperapprovedshopdrawingsforthesuperstructure.
ØApprovedmaterialsusedfortemporaryformworksshouldbecleanstrongandclearfromanydeflection.
ØShutterwillbetreatedwithapprovedshutterreleasingagenttoenableeasierstripping.
ØInstallformworktoitsdimensionscorrectlyandensurethatlinesandlevelsarewithinthetolerances.
ØTheshutterswillbebracedandanchoragesproperlyaspertheapprovedshopdrawingstomaintaintheproperalignmentandplumbnessoftheforms.
ØLineandleveloftheshutteringwillbesetoutbythesurveyor.Shuttersmustbecheckedforcorrectnessintheirfinalposition.
ØTierodsshallbeusedforproperalignment.
ØTieroadsaretobecorrectlytightenedandrecheckedpriortocasting.
ØGapsintheshuttermustbepluggedouttominimizethepossibilityofgroutlossduringthecastingoperation.
ØCovertoconcreteshallbeprovidedasperthedrawingandspecifications.
FabricationandFixingOfSteelReinforcement
Materials
Allreinforcingmaterialsshallbeasperapprovedmaterials.
Fabrication
BarbendingscheduleshallbepreparedinaccordancetoapprovedshopdrawingandcomplywithrelevantBS4466.
AllreinforcementshallbecuttolengthandbendittotheshapeshowninBBS.Slowandsteadypressureshallbeensuredduringbendingprocess.Afterbendingallbarsmustbesecurelytiedtogetherinbundlesandappropriatelybeltedwithmemberreferenceidentification.
FixingofReinforcement
∙SettingoutshallbedonebythesurveyorpriortoproceedingandITRshallberaisedfortheCONSULTANTinspectionandapprovals.
∙Prefabricatedsteelshallbeplacedinpositionasperapprovedshopdrawings.Approved1.6mmdia.blackannealedmildsteelwireshallbeusedtotiereinforcingbar.Theendsofthewireshallbebendbackaway.
∙Spacerblocksofapprovedtypesshallbeusedtomaintainthecover.
∙Supportthereinforcingbarbyapprovedconcretespacerappropriatelytopreventdisplacementduringconcretingoperation.Thethicknessofcoverblockshallbeasperapprovedshopdrawingandspecifications.
∙Whereverreinforcementsareplacedintwoormorelayers,minimum25mmspacershallbeplacedbetweenlayers.Allbarsinupperlayersmustbeplaceddirectlyabovethoseinthebottomlayers.
∙AllembedmentorinsertsrelatedtoMEPshallbeplacedasperapprovedshopdrawings.
∙Allreinforcementmustbeclearedtoensurethatitisfreefromalloil,corrosion,dustanddeleteriousmaterials.
ConcretePlacing,Compaction&Finish
General
Concreteplacementshallnotstartuntilallothertradeshavecompleted/installedtheirembedment.OnceallembedmentarecompletedCONSULTANTapprovalshallbeobtainedbyITR.MEPclearanceshallbeobtainedpriortoproceeding.
PreparationforPlacing
Allsurfacesshallbeclearedthoroughly,removeanywater.De-shutteringoilshallbeplacedontheformwork.Adequatesafetymeasuresshallbeinplace.LogisticplanshallbesubmittedtotheCONSULTANTpriortoproceedingwithconcretepouring.
ConcretePouring
∙Appropriatearrangementandapprovalforconveyingconcrete(Chutes,pump,manual)shallbeobtainedfromCONSULTANT.
∙Ensurethatalltherequiredconstructiontools,no.ofvibrators,lightingarrangement(ifneededforthenightshiftconcreting),sufficientsupervisionstaffandmanpowerisavailable.
∙Cranes,concretebucket,Pumps,chute,Shovelandmanualmethodswillbeusedaspertheelevation’quantityofconcrete
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