淺談公路工程施工中關(guān)鍵部位施工技術(shù)（Constructiontechnologyofkeypartsinhighwayengineeringconstruction）0,XiMengxi.^device.DiscussiononhighwayengineeringconstructionKeypartsconstructiontechnologyJiangsutrafficengineeringconsultingSupervisionCo.,Ltd.ChenMingliang__-thispaperdiscusseshighwayengineeringkeypartsconstructionrequirementsandqualitycontrol.CombinedwiththeengineeringpracticeIthascertainreferencesignificanceforhighwayengineeringconstruction.Lianshan_highwayengineering;keyparts;constructionThekeypointofcontrollingthequalityoftheprojectistograspthequalityofthekeypartsoftheconstruction.Canseriouslycontroltheconstructionofkeypartsoftheproject,easytoappearqualityQualitymonitoringcanbeavoidedbymonitoringkeypartsofthetrapandthequalityoftheaccidentHappen。Combiningwiththeengineeringpractice,thispaperfocusesonhowtodoagoodjobinkeypartsElaborate.1.settingupthekeypointsofhighwayengineeringqualitycontrolThekeypointsofqualitycontrolinhighwayengineeringshouldbebasedondesigndocumentsandspecialprojectsSpecificationsandconstructionqualityplanrequirementsaresetupthroughhighwayqualitycontrolSetuptoensuretheconstructionofengineeringthatmeetsdesignandspecificationrequirements.1.1qualitycontrolkeypointsettingprinciple.Principlesinclude:ConstructionImportantprojects,weaklinksandkeyparts:influenceduration,quality,successSafety,materialconsumptionandotherimportantfactors:newmaterials,newtechnologies,TheconstructionprocessofArt:itemswithfrequentfrequencyofdefectsinqualityinformationfeedback.Thepointsshallalsobeadjustedwiththeprogressoftheconstructionandthechangesintheinfluencingfactors.1.2controlmethodofkeypointsofqualitycontrol.First,establishqualitycontrolPointofmanagementmeasures,twoistoimplementthequalityresponsibility.ThreeistocarryoutasamplinginspectionFouroftheactivitiesaretofillinthequalityrecordsofthekeypointsofqualitycontrol.qualityThekeypointfilesmainlyinclude:operationflowchart:keypointlist:Factoranalysissheet,operationinstruction,selfcheck,handoverinspectionandprofessionalinspectionAndcontrolchartprocessqualityinformationfiveistoimplementandeconomicresponsibilityphaseInspectionandassessmentsystem.1.3qualitycontrolkeypointsoftheactualeffectofinspection.QualitycontrolkeyTheactualeffectismanifestedintheconstructionqualitymanagementlevelandtherealizationofeachindex.WeshouldusemathematicalstatisticstodrawuptheoverallqualityanalysisofengineeringprojectsThechartshouldreflectthedynamiccontrolprocessandtheactualqualityoftheconstructionprojectSuiTheanalysisshouldbeincludedintheconstructionprojectqualitymanagementbyobjectives_Pakistanineachstageofquality.2.,highwayengineeringqualitycontrolkeypointsofconcretemeasures2.1,closetherawmaterialsstrictly.RawmaterialtestreportmustbemadeinordertomakeconstructionThematerialsusedintheschemeshallprevail.MaterialsusedduringconstructionandconstructionThesampleinthecasemustbeconsistentintimeandplace.ThegoodscannotbedeliveredTestreportonreplacingrawmaterial.2.2measurementsandtests.Therawreferencepoints,wirepoints,andcontrolsshallbemaintainedatanytimeCheckthemeasuringpointsandkeepthemeasuringrecords.KeypartTheinspectionofbitandsuspiciouspointsisnotlimitedbythefrequencyofthetest.ThefieldtechnicianshallcarrysimplemeasuringinstrumentsandtestequipmentwitheaseandconvenienceSuspiciouspointswerefound.2.3earthworksubgradeengineering.First,constructionloftingandcrosssectionsurvey,twoistheroadThegroundtreatmentshallbehandledaccordingtotheconstructiontechnicalcontractorspecificationsTruecompaction.TheuseofsuitablematerialsmustbegovernedbydesignandspecificationsEnsuretherawmaterialisqualified.CorrectlydeterminethemaximumdrydensityandoptimumcontentofsoilWaterquantity:fouristhethicknessofeachlayerandthetransverseslope;fiveisthelayeringcompaction,thecontrolfillsSoilmoisturecontenttoensurecompactiontomeetdesignrequirements.2.4,theroadbase(subbase).First,theuseofequipmentatthegrassrootslevelconstruction:Twoisthebindingdose;threeisthematerialusedandthewatercontent,mixinguniformity,Mixtureratiofouristhedegreeofcompaction,deflection,smoothnessandcrossslope,etc.;five,suchasminingWithgradedcrushedstones,attentionshouldbepaidtoaggregategradationandcrushingvalueofstone.2.5asphaltconcretepavement.First,thegrass-rootslevelofstrength,roughness,elevationinspectionAndcontrol;twoistheinspectionandtestofbituminousmaterials;threeisthegradationandleachingofaggregatesMixproportiondesignandtestofgreenconcrete;fouristheconfigurationandgroupofpavementconstructionmachineryequipmentCombination:fiveisasphaltconcretetransportationandpavingtemperaturecontrol;sixispavingthicknesscontrolSystem:seven,rollingandseamconstruction.2.6cementconcretepavement.First,thegrass-rootslevelofstrength,roughness,elevationinspectionAndcontrol.Twoistheinspectionandtestofconcretematerials:three,concretemixdesignandtestPiecesoftest:fouristheconcretepaving.Vibration,moldingandavoidsegregation:fiveissawTheuglymouth,themouth,theright,theseconddish,theriverSewingtimeandmasteryofhealth.2.7cementconcretemixing.AmixturemadebythemixingofamixingplantThereislittlelikelihoodofaqualityproblem,ThekeypointofconstructionmanagementshouldbedispersedTheconstructionofthesmallmixer.Smallmixermorehumanfactors,Lackofstrictmeteringsystem,sowemustfocusonqualitycontrolTheoccurrenceofsegregation.2.8managementofprecaststickconcretebeams.Precastconcretebeam;generalconstructorExceptforsomeaccidentalfactors,thequalityproblemscanbepaidmoreattentiontoLessenergy.Therefore,thefocusofqualitymanagementshouldbeplacedontheinspectionoftheprogramErrorsinthepreventionofkeytechnicalindicators.Forprestressedbeams,shallbeadequateNotewhetherthegroutingtimeaftertensioningiswithintheprescribedrangeandthegroutingprocess,Camber,etc..3.mainqualitydefectsandpreventionmeasuresinhighwayengineeringconstruction3.1Subgrade"Spring"Preventionandcure.1)avoidusingnaturalconsistencylessthan11.,liquidlimitisgreaterthan40.,plasticityindexisgreaterthan8,moisturecontentisgreaterthanthebestThesoilwithtwopercentagepointsofwaterisusedassubgradefilling.2)removetheweaklayerofrollinglayerLayer,fillinthegoodsoil,thenreroll.Pairproduce"Spring"LocationThewetsoilwillbewashedandmixedevenly,thenrerolledordugtoreplaceandfillthewaterTheamountofsuitablebenignsoilafterrerolling;toproduce"Spring"AndeagertocatchupThesectionoftheworkcanbemixedwithlimepowderandmixeduntilthewatercontentissuitableforregrindingStrictlyprohibitthefillingofheterogeneoussoil,especiallythesoilbagwithpoorwaterpermeabilityAwellpermeablesoil,soasnottoformawatersac.3)fillingtheupperdeckshouldbegoodDrainsorothermeasuresaretakentolowerthegroundwaterlevelto50Cmbelowthesubgrade:Whenfillingtheupperstratum,thecompactnessandmoisturecontentofthelowerfillshallbeexaminedTheupperlayercanbefilledbeforeinspectionPreventionandcureofcracksinlimestabilizedsoilbasecourse3.2.1)improvementofconstructionsoil;Soilwithlowplasticityindexorsuitableamountofflyash.2)controlCompactingwatercontent.ItisnecessarytousethebestmoisturecontentaccordingtothenatureofsoiltoavoidcontainingToohighortoolow.3)laythecrushedstonetransitionlayeronthelimesoilbaseandroadAlayerofgraveltransitionlayercanbeavoidedtoavoidcracks;4)addhotgranulesInthelimesoilmixedwithappropriatesand,gravel,bricks,cinderandslagetc..5points)Whenpaving,duringtheperiodoflimesoilstrengthformation,anyshrinkagecracksareproducedTheupperlayercaneffectivelyreducethecracksinthenewpavinglayer;6)setthecontractionSeam,inthelimesoillayer,setacontractionatintervalsof5mto10m3.3preventionandcureofcracksincementstabilizedsoilbasecourse.1)improvementofconstructionsoil;Soilwithlowplasticityindexorsuitableamountofflyash.2)controlCompactionofwatercontent,accordingtothenatureofsoil,theuseofthebestwatercontent,watercontentToohighortoolowisbad.3)onthepremiseofensuringthestabilityofcementstabilizedsoilUselowcementasmuchaspossible.4)moldingatonce,usingslowcoagulationasmuchaspossibleCement.Strengthenthehealthofcementstabilizedsoil.Avoidmoistureevaporationtoofast.5)Reasonabledesignofcementstabilizedsoilmixtureratio,strengthenmixing,avoidthethicknessMaterialsegregationandinhomogeneity.3.4asphaltconcretepavementirregularitiesprevention.1)inthepaverandlevelingdevicesothatBeforeuse,setandadjustby4-7-.MakeitingoodworkingconditionandaccordingtorealityTheeffectisadjustedatanytime.2)thesceneshouldbedirectedbyspecialpersonneltotransportvehiclestoensurethatstallsThemachineshouldbeoperatedevenlyandcontinuously,andthepaverwillnotstoponthewayMachinespeed.3)thesmoothnessofeachstructurallayeroftheroadshallbestrictlycontrolledInspectionsystemofprocedure.4)accordingtothecharacteristicsofasphaltinmixture,determinetherollerThetypeandweightofthemachine,anddeterminetheinitialtemperatureoftheconstruction,andreasonablyselecttherollingspeedItisstrictlyprohibitedtoslamthebrakesonthesurfaceofthemouldedoilandstartquickly,andchoosetherightoneVibrationfrequencyandamplitude.5)beforethepaver,setupaspecialpersontoremoveit"Slipper"MixingbeforeMaterialandthemixtureunderthecrawlerofthepaver.6)toimprovethestructureexpansionjointandasphaltroadThesurfaceofthejointisfirmandsmooth.First,theasphaltconcretesurfaceisspread,andthenthestructureisexpandedJoint.7)dowellthejointconstructionofasphaltconcretepavement.3.5preventionandcureofjointdiseaseofasphaltconcretepavement.Transversejoint:First,itwillbespreadTheendsofthepavementaresawntoaverticalsurfaceandatrightanglestotheverticaledge:twoispreheatedCompactedpartsoftheroad.Reinforcingtheviscosityoftheoldandnewmixture.ThreeisthestartingspeedofthepaverTotMann,andadjustthereservedheight,pavingimmediatelyaftertheendofrolling,rollingspeedisnottoogoodFast.Longitudinaljoint:OneistouseheatJiechaconstruction,Use2ormorethan2unitsPaverechelonoperation;twoistohavepavingmixturestay10CM~20CMtemporarilynotRollingisusedastheelevationdatumofthebackpavingpartRolling:three,a