METHODSTATEMENT
FORAIRPORTAUTHORITYHONGKONG
THREERUNWAYSYSTEMproject
(CONTRACT3206MAINRECLAMATIONWORKS)
5thAug2016
Contents
TOC\o1-2\u1.ProjectOverview 1
2.Mobilization 1
2.1Equipments 1
2.2ManpowerPlan 4
2.3MaterialSupplyandMethodofTransportandStorage 4
3.DCMWork 7
3.1PositioningWorksforDCMRigs 7
3.2ConstructionParameters 8
3.3BinderDesign 10
3.4TrialArea 11
4.MethodologyforInstallingDCMclusters 12
5.SpecificQA/QCproceduresandmeasures 17
6.SamplingandTesting 17
6.1Binder 17
6.2CementSlurry 18
6.3DCMColumnEmbedmentinSandBlanket 18
6.4DCMColumn–CoreSamplingandTesting 18
6.5LaboratoryTesting 20
PAGE8
1.ProjectOverview
TheworksintheHongKonginternationalairportthreerunwayprojectcomprisetheformationofapproximately650hectaresoflandnorthoftheexistingairportisland.Theoriginalgroundwillbeimprovedandmarine/landfillswillbeplacedandcompactedtotheelevationoftheDesignFormationLevel(DFL).
DCMareasareshowinFigure1.1.
Appliedarea:836,206m2
Totalquantity:1,722,000m3.
MarineandLandbasedDCM
MarineandLandbased
DCM
Figure1.1DCMArea
2.Mobilization
2.1Equipments
TheproposedequipmentsarelistedinTable2.1.4ShaftAugerand4ShaftStirWingoftheDCMdrillingequipmentareshowninFigure2.1.TypicalDCMrigsareshowninFigure2.2.CementslurryplantandDCMrigareshowninFigure2.3.
Table2.1EquipmentList
No.
TypeofConstructionalPlantandEquipment
ModelorNameofConstructionalPlantandEquipment
Quantity
1
LandDCMRigwithAutomatedGPSSystem
4×Φ1300mmShaftAugerMachine,Model:SW-600P-4-M
10
2
BatchingandMixingPlantforCementSlurryPreparation
Zb－3Automaticmixingplant
2
3
MobileCementMixingStation
-
2
4
Leak-proofContainerforstorageofsurplusCementSlurry
Storagetankofslurry
10
5
AirCompressorConveyors
8m3aircompressor
2
6
CementLorry
20m3
2
7
SeawaterPump
7.