Section 31 20 00EARTH MOVINGWord文档格式.docx
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Section 31 20 00EARTH MOVINGWord文档格式.docx
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4.Fillingandbackfilling.
5.Grading.
6.SoilDisposal.
7.CleanUp.
1.2DEFINITIONS:
A.UnsuitableMaterials:
1.Fills:
Topsoil;
frozenmaterials;
constructionmaterialsandmaterialssubjecttodecomposition;
clodsofclayandstoneslargerthan75mm(3inches);
organicmaterial,includingsilts,whichareunstable;
andinorganicmaterials,includingsilts,toowettobestableandanymaterialwithaliquidlimitandplasticityindexexceeding40and15respectively.Unsatisfactorysoilsalsoincludesatisfactorysoilsnotmaintainedwithin2percentofoptimummoisturecontentattimeofcompaction,asdefinedbyASTM//D698//D1557////AASHTO//T99//T180.
2.ExistingSubgrade(ExceptFootingSubgrade):
Samematerialsas1.2.A.1,thatarenotcapableofdirectsupportofslabs,pavement,andsimilaritemswithpossibleexceptionofimprovementbycompaction,proofrolling,orsimilarmethods.
3.ExistingSubgrade(FootingsOnly):
Sameasparagraph1,butnofillorbackfill.Ifmaterialsdifferfrom//referenceboringsand//designrequirements,excavatetoacceptablestratasubjecttoResidentEngineer'
sapproval.
B.BuildingEarthwork:
Earthworkoperationsrequiredinareaenclosedbyalinelocated1500mm(5feet)outsideofprincipalbuildingperimeter.Italsoincludesearthworkrequiredforauxiliarystructuresandbuildings.
C.TrenchEarthwork:
Trenchworkrequiredforutilitylines.
D.SiteEarthwork:
Earthworkoperationsrequiredinareaoutsideofalinelocated1500mm(5feet)outsideofprincipalbuildingperimeterandwithinnewconstructionareawithexceptionsnotedabove.
E.Degreeofcompaction:
Degreeofcompactionisexpressedasapercentageofmaximumdensityobtainedbylaboratorytestprocedure.ThispercentageofmaximumdensityisobtainedthroughuseofdataprovidedfromresultsoffieldtestprocedurespresentedinASTMD1556,ASTMD2167,andASTMD2922.
F.Fill:
Satisfactorysoilmaterialsusedtoraiseexistinggrades.IntheConstructionDocuments,theterm“fill”meansfillorbackfillasappropriate.
G.Backfill:
Soilmaterialsorcontrolledlowstrengthmaterialusedtofillanexcavation.
H.Unauthorizedexcavation:
Removalofmaterialsbeyondindicatedsub-gradeelevationsorindicatedlinesanddimensionswithoutwrittenauthorizationbytheResidentEngineer.Nopaymentwillbemadeforunauthorizedexcavationorremedialworkrequiredtocorrectunauthorizedexcavation.
I.Authorizedadditionalexcavation:
RemovalofadditionalmaterialauthorizedbytheResidentEngineerbasedonthedeterminationbytheGovernment’ssoilstestingagencythatunsuitablebearingmaterialsareencounteredatrequiredsub-gradeelevations.RemovalofunsuitablematerialanditsreplacementasdirectedwillbepaidonbasisofConditionsoftheContractrelativetochangesinwork.
J.Subgrade:
Theundisturbedearthorthecompactedsoillayerimmediatelybelowgranularsub-base,drainagefill,ortopsoilmaterials.
K.Structure:
Buildings,foundations,slabs,tanks,curbs,mechanicalandelectricalappurtenances,orotherman-madestationaryfeaturesconstructedaboveorbelowthegroundsurface.
L.Borrow:
Satisfactorysoilimportedfromoff-siteforuseasfillorbackfill.
M.Drainagecourse:
Layersupportingslab-on-gradeusedtominimizecapillaryflowofporewater.
N.Beddingcourse:
Layerplacedovertheexcavatedsub-gradeinatrenchbeforelayingpipe.Beddingcourseshallextenduptothespringlineofthepipe.
O.Sub-baseCourse:
Layerplacedbetweenthesub-gradeandbasecourseforasphaltpavingorlayerplacedbetweenthesub-gradeandaconcretepavementorwalk.
P.Utilitiesincludeon-siteundergroundpipes,conduits,ducts,andcablesaswellasundergroundserviceswithinbuildings.
Q.Debris:
Debrisincludesallmaterialslocatedwithinthedesignatedworkareanotcoveredintheotherdefinitionsandshallincludebutnotbelimitedtoitemslikevehicles,equipment,appliances,buildingmaterialsorremainsthereof,tires,anysolidorliquidchemicalsorproductsstoredorfoundincontainersorspilledontheground.
R.Contaminatedsoils:
SoilthatcontainscontaminatesasdefinedanddeterminedbytheResidentEngineerortheGovernment’stestingagency.
1.3RELATEDWORK:
A.Materialstestingandinspectionduringconstruction:
Section014529,TESTINGLABORATORYSERVICES.
B.Safetyrequirements//andblastingoperations//:
Section007200,GENERALCONDITIONS,Article,ACCIDENTPREVENTION.
C.Protectionofexistingutilities,fireprotectionservices,existingequipment,roads,andpavements:
Section010000,GENERALREQUIREMENTS.
D.SubsurfaceInvestigation:
Section010000,GENERALREQUIREMENTS,Article,PHYSICALDATA.
//E.ErosionControl:
Section015719,TEMPORARYENVIRONMENTALCONTROLS,andSection329000,PLANTING.//
//F.Sitepreparation:
Section312319,DEWATERING,andSection024100,DEMOLITION.//
//G.Foundationsystemrequirements:
Section316200,DRIVENPILES,Section316316,AUGERCASTGROUTPILES,Section316326,DRILLEDCAISSONS,Section312323.33,FLOWABLEFILL.//
//H.Pavingsub-graderequirements:
Section321216,ASPHALTPAVING.//
1.4CLASSIFICATIONOFEXCAVATION:
A.UnclassifiedExcavation:
Removalanddisposalofpavementsandotherman-madeobstructionsvisibleonsurface;
utilities,andotheritemsincludingundergroundstructuresindicatedtobedemolishedandremoved;
togetherwithanytypeofmaterialsregardlessofcharacterofmaterialandobstructionsencountered.
RetaineitherUnclassifiedExcavationaboveorClassifiedExcavationbelow.
B.ClassifiedExcavation:
RemovalanddisposalofallmaterialexceptthatmaterialnotdefinedasRock.
C.RockExcavation:
Therequirementsfortrackmountedpowerexcavatorsmayvary.Discusswithsoilsconsultantandmodifyasnecessary.
1.TrenchesandPits:
Removalanddisposalofsolid,homogenous,interlockingcrystallinematerialwithfirmlycemented,laminated,orfoliatedmassesorconglomeratedepositsthatcannotbeexcavatedwithalate-model,track-mountedhydraulicexcavator;
equippedwitha1050mm(42inch)wide,short-tip-radiusrockbucket;
ratedatnotlessthan103kW(138hp)flywheelpowerwithbucket-curlingforceofnotlessthan125kN(28,090lbf)andstick-crowdforceofnotlessthan84.5kN(19,000lbf);
measuredaccordingtoSAEJ-1179.Trenchesinexcessof3000mm(10feet)wideandpitsinexcessof9000mm(30feet)ineitherlengthorwidthareclassifiedasopenexcavation.
2.OpenExcavation:
Removalanddisposalofsolid,homogenous,interlockingcrystallinematerialfirmlycemented,laminated,orfoliatedmassesorconglomeratedepositsthatcannotbedislodgedandexcavatedwithalate-model,track-mountedloader;
ratedatnotlessthan157kW(210hp)flywheelpoweranddevelopingaminimumof216kN(48,510lbf)breakoutforce;
measuredaccordingtoSAEJ-732.
3.Othertypesofmaterialsclassifiedasrockareunstratifiedmasses,conglomerateddepositsandbouldersofrockmaterialexceeding0.76m3(1cubicyard)foropenexcavation,or0.57m3(3/4cubicyard)forfootingandtrenchexcavationthatcannotberemovedbyrockexcavatingequipmentequivalenttotheaboveinsizeandperformanceratings,withoutsystematicdrilling,ramhammering,ripping,orblasting,whenpermitted.
4.Blasting:
Removalanddisposalofsolid,homogenous,interlockingcrystallinematerialfirmlycemented,laminated,orfoliatedmassesorconglomeratedepositsthatcannotberemovedwithconventionalmethodsmay//maynot//beperformedbyblasting.
Therequirementsforblasting,ifallowedshallbelistedunderaseparatespecificationsection.
5.Definitionsofrockandguidelinesforequipmentarepresentedforgeneralinformationpurposesonly.TheContractorisexpectedtousetheinformationpresentedintheGeotechnicalEngineeringReporttoevaluatetheextentandcompetencyoftherockandtodeterminebothquantityestimationsandremovalequipmentandefforts.
1.5MEASUREMENTANDPAYMENTFORROCKEXCAVATION:
ThissectiononlyapplieswhenusingClassifiedExcavation
A.Measurement:
Crosssectionandmeasureuncoveredandseparatedmaterials,andcomputequantitiesbyRegisteredProfessionalLandSurveyororRegisteredCivilEngineer,specifiedinSection010000,GENERALREQUIREMENTS.Donotmeasurequantitiesbeyondthefollowinglimits:
1.600mm(24inches)fromoutsidefaceofconcreteworkforwhichformsarerequired,exceptforfootings.
2.300mm(12inches)fromoutsideofperimeterofformedfootings.
3.150mm(6inches)belowbottomofpipeandnotmorethanpipediameterplus600mm(24inches)inwidthforpipetrenches.
4.Fromoutsidedimensionsofconcreteworkforwhichnoformsarerequired(trenches,conduits,andsimilaritemsnotr
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