小解公路路面施工问题 4页

小解公路路面施工问题1.treatmentmeasuresofsegregationinasphaltpavementconstructionIntheconstructionofhighgradehighwaypavement,thesegregationphenomenonofasphaItconcreteduringpavingisveryserious・Segregationofasphaltsurfacelayerisnotunifomimixtureofcoarseandfineaggregateandasphaltcontent,coarseaggregatepositiongapfocusrateistoolarge,theasphaltcontentislow,intheusestagepronetowaterdamage,theformationofpitsandloosephenomenon;andthefineaggregatecontentofasphaltismoreconcentratedarea,porosityistoosmall,itwillcausetheproblemofpavementupheaval,ruttingandbleedingetc・・1.1iftheasphaltmixerorlocalvibrationsieverupture,willmakethemixturemixedwithsomemorespecificationsoflargediameteraggregate,mustalwayscheckreplacement・1.2,inmixingsiteselection,trytomakemixingsiteandpavingsitedistanceisnottoofar・Atthesametime,shouldbeappropriatetoreducespeed,smoothtransportation,thetransportationprocess,tominimizeturbulence;tostockpileinsulationmeasuresshouldbetaken,suchastocovertarpaulinetc・・1.3intheassemblyprocessofPaverScreed,firstpayattentiontothebottomsurfaceofthejointissmooth,whetherfrontflush,bottomplate,tampinghammerheadandbladeweardeformation;secondly,topayattentiontothematerialdistributionhelixnearthemiddlepartandtheconnectingpartisreverseleaves,because themajorityofsegregationinthepavingprocessappearinthethespiralconnectingpartandthemiddlepositionofpaver・1.4spiraljointshavereducedsegregationphenomenon,anotherapproachistouseacompletespiral,namelythroughshaftandspreadingofthesamewidthcanimprovethesegregation,butstillcannotcompletelysolveandeliminatesegregationphenomenon.1.5anothercauseofsegregationisspreadingfrequentupbyhoppersidecaused,ineachcarunloadingattheendofthelargegrainsizegravelinthehopperisrelativelyconcentrated,thesideplatesofthematerialintothedistributorwillinevitablyappearsegregation.Thebestmeasuresshouldbe:acarisexpectedtobedischargedfromthemixturepaver,theremainderreceivedstopplatescraperscrapingplate,tobethenextcarmixturedischargedintothehopperafterscrapingplatematerialwillrotatetogetherintothedistributorforpavingsegregationcannotonlysolvethequestionproblemandcontinuousconstructioninordertoobtaingoodpavementperformance・1.6ofthesurfacesegregation,generallybythespreadingprocess,someconstructionsitedirectlyandmixture,causedbytherollerwhenstonewascrushedandwhitephenomenon,andevenaffecttheflatness,reachthedesiredeffect・Thecorrectapproachshouldbetomixthematerialthroughthe15mmsieve,inthedoublesteelwheelrollerbeforerolling,withfinematerialtosprinklesegregationparts.1.7thetwostallsdualoperationmachineshop,isameasureofimplementationofthecountryatpresent,buttherearealsotwojobprocessingproblems,twosetsofpaverjointsegregationand twosetsofpavercamberconsistency,sotheneedtocontinuetocarryoutfollow-upsurveydemonstration.Butinfactthesingleoperationdoesexistonbothsidesofthepaverintermediateanddensedegreeofinconsistency,stabilitydifferences,edgesegregationofobviousproblems,itshouldbetreatedrespectivelyaccordingtotheactualsituation,forthecoarseasphaltconcreteinthemiddlelayer,theupperlayerisgenerallyuseddualoperation,orfinestructure・Withasingleoperationcanalsoachievegoodpavingeffect・Thesmoothnessoftheasphaltpavementconstruction,measures2.Whenasphaltmixtureispaved,thecontentofthemaximumparticlesizeandthegradationoftheaggregatearestrictlycontrolled,soastoreducethefluctuationofthecoefficientofcompaction.Checkwhetherthevibrationsystemandlevelingsystemarenormalandpreheatthescreed・1.1paving,usingthe^referencewiremethod"inleveling,pavingthesidelinesabout20cmintothesolidsupportrod,thesupportrodaccordingtothepilespacingof10m,locatedinmiddleandlowerlayertopdesignlevelwithaconstantelevationofstee1.Thelengthofthelayingof2.2benchmarksteelwireisabout300m・Whenthelengthofsteelwireis200to250m,thetensionshouldbe100、130KN.Whenthelengthofsteelwireisbetween250and300m,thetensionshouldbe150~200KN;Themaximumdeflectionofthedatumsteelwirewithin10mshallnotexceed2mm,andthesupportingrodshallbesupportedif necessary.1.3supportstrutsshallbeusedbeforeandafterthecurveradiusissmallornearornearthesideoftheslope・1.4,supportrodandbenchmarksteelwireerectionelevation,aftercheckingcorrect,canbeginpaving,inthecourseoflaying,siteshouldbecheckedbackandforth,topreventvehicles,constructionworkersandmechanicalcollisionsupportrodorwire・2.treatmentmeasuresofjointsinasphaltpavementconstructionTheroadconstructionjointsaredividedintolongitudinalandtransversejoints・Longitudinalseamismainlyfortheentireroadsurfacecannotbepavedatthesametime,whilethetransversejointisbecausethepaverisliftedandrehomingwilloccur.