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1、附录一HighwayengineeringroadbedconstructionqualityproblemexploreanalyseAbstracttheroadbedisthehighwayfoundation,foundation,itisacrucialroadportionoftissue.Roadbedconstructiongoodring,directlyaffecttheroadusagelife,alsorelatedtothesubsequentrepairdegreeandtime.Thisart
2、iclefromthehighwayroadbedcommonetiologyanalysesproceedwith,putforwardtheroadbedconstructiontechnologyrequirement,elaboratedthemethodforSubgradeconstruction.KeywordshighwayroadbedconstructionqualityandtechnicalmeasuresTheroadbedisthebasisoftheroad,underthevehiclelo
3、ad,theprojecthasthefollowingcharacteristics:engineeringamountbig,laborintensive,involvewide,investmentishigh.Subgradeengineeringquality,directlyaffectsthequalityofhighway,passengercomfortandnormaltraffic.OnthequalityofroadbedofHighwayDiseaseofmanyinfluencefactors,
4、problemsalsooccurfrequently,butmostofthemorbytheconstructionqualityproblemscausedby.Acommonetiologyanalysis,highwayroadbed:1roadbedsubsidence.Roadbedsubsidenceappearsthereasonmainlyhas:FillSubgradeduetoinadequatecompactionandsubsidence;bridgeandculvertchannelstruc
5、tureandroadbedlinking-upofficesincethematerialsusedimproperlyorwhenrollingthedifficultandcannotbefullycompacted,causinggradualsubsidenceofsoftsoilroadbed;withoutdisposalormethodisnotproperlycauseofsubgradesettlement.Atpresent,highway,constructioncycleisshort,noten
6、oughnaturalsubgradesettlementtime,butduetorushdeadlineswithoutnaturalsubsidenceofroadbedpavementfullybuilt,thesettlementoftheroadbedarereflectedontothepavement;roadbedconstruction,soilmoisturecontentistoolarge,cannotmeettherequirementsofspecificationofpressurefill
7、ingdensity,therebysubgradesettlementtoleavehiddentrouble.The2longitudinalcrack.Initialfillingroadbedwidthisinsufficient,tofillintoacertainheightthroughtheexaminationfoundthatfillisnotwideenough,ormidlinedeviation,tofilltheedge,intheband,andwasrequiredtodigstepanda
8、bottom-uphierarchicalplacementandcompaction,causedafterthecompletionoftheprojectbandsinking,thelongitudinalcrack;Jinganddoesnotreachthedesignatedpositio
