1、公路施工新技術,2004年12月,施工過程,施工過程新技術,自檢碾壓機移動式拌和樓紅外線攝影機混合料傳送機,不均勻密度的影響,同壓密不夠類似增加剝落與水損減少疲勞壽命增加空隙率1%將至少減少10%的壽命,不均勻密度的位置,溫差超過14C空隙率增加2%,材料傳遞機,材料傳遞機拌和葉片,攤鋪之前的再拌和,施工工藝自動化,計算機技術應用衛(wèi)星和激光定位技術遙控技術圖控技術機器眼技術動態(tài)反饋和傳感技術人機對話技術,衛(wèi)星定位技術,激光定位技術,遙控技術,遙控挖掘裝載機,碾壓自動化,多臺碾壓機碾壓自動化,機器眼探測裂縫,機器眼安裝路面標記,自動封縫機,圖控技術,人機對話,遙控管涵安裝機,遙控挖掘裝載機,橋梁

2、除漆機器人,自動掃雪灑鹽機,路面新技術,超級性能路面瑪蹄脂瀝青碎石混凝土路面永久路面,混合料主要特點,嚴格的材料選擇,旋轉壓密機和體積比設計,瀝青性能分級,以天氣為基礎,PG64-22,PerformanceGrade,Average7-daymaxpavementdesigntemp,Minpavementdesigntemp,Thelowerthenumber,themoreresistanttothermalcracking.,PG-22-28-34,集料特性,基本特性要求coarseaggregateangularity(CAA)fineaggregateangularity(FAA)

3、flat,elongatedparticles(F&E)claycontent(SE)來源特性選擇toughnesssoundnessdeleteriousmaterialspolishvalues,100,0,.075.32.364.759.512.519.0,PercentPassing,SieveSize(mm)Raisedto0.45Power,級配,控制點,100,0,.075.32.364.759.512.519.0,PercentPassing,controlpoint,restrictedzone,maxdensityline,maxsize,nommaxsize,SieveS

4、ize(mm)Raisedto0.45Power,MarshallMethod,19.0mm,25.0mm,37.5mm,9.5mm,4.75mm,12.5mm,AGGREGATEGRADATIONNominalSize:19.0mmSMA&19.0mmSuperpave,PercentPassing,SMA,Superpave,19.0mmSuperpave,InsertI-70,I-70Ndesign-9619.0mmSMAVTM-4.3,AGGREGATEGRADATIONNominalSize:12.5mmSMA&12.5mmSuperpave,SMA,Superpave,I-8312

5、.5mmPG70-22Binder,First12.5mmSMA,I-68,熱壓密和緊跟攤鋪機!,特性比較,RutResistantDurableSkidResistantReducedSprayReducedHydroplaningReducedSound,SuperpaveSMA,DecisionPointsforusingSMAastheSurfaceLayer,2000ESALsperday55mph,永久路面路面設計概念,永久路面路面設計概念,抗疲勞瀝青基層：通過厚度使拉應變最小,永久路面路面設計概念,抗車轍上面層,集料顆粒摩擦互鎖：軋制和粗顆粒瀝青膠結料：高溫性能和改性空隙率：現場

6、4%-6%,永久路面路面設計概念,抗車轍上面層車轍試驗驗證現場加速試驗,上開裂,華盛頓州永久路面,州際高速公路90號47%沒有破壞27-33年；路面24公分；第一次罩面12年；第二次罩面13年。,厚度比較,性能試驗,車轍儀,車轍儀試驗結果,路面噪音,FHWA-NoiseAbatementCriteria67dB(A)“thisisnotanabsolutevalueordesignstandard,onlyalevelwherenoisemitigationmustbeconsidered”,TheDecibelScale,HearingThreshold,Conversation,PainT

7、hreshold,Discomfort,TheDecibelScale,Increasingthedecibellevelby10doublesthenoiseintensity!,Conversation,Train,ChainSaw,隔音墻,Effectiveonlyforthoseinline-of-sight.,Donotreducenoiseatsource.,Effectivenessmustjustifyexpense.Cases:I-40,Knoxville:$25,000/homeI-285,Atlanta:Requirementsof69dB(A)and67dB(A),5d

8、B(A)Nationwide(FHWA,1998):$1M/mile,隔音墻,Conclusions,“Ingeneral,whendense-gradedasphaltandPCCpavementsarecompared,thedense-gradedisquieterby2to3dB(A)”,路面微觀構造,67dB(A),15m,TheDecibelScale,Areductionof3dB(A)islikedoublingthedistancefromthenoise.,67dB(A),30m,-3dB(A)=64dB(A),Conclusions:“Ingeneral,whendens

9、e-gradedasphaltandPCCpavementsarecompared,thedense-gradedisquieterby2to3dB(A)”,A3dB(A)reductioncorrespondsto:-doublingthedistance-reducingtrafficvolumeby50%-reducingtrafficspeedby25%,Conclusions:“Open-gradedasphaltshowsthegreatestpotentialfornoisereductionforpassbynoise.Reductionwhencomparedtodense-

10、gradedasphaltrangedfrom1to9dB(A).”,A9dB(A)reductioncorrespondsto:-areductionintrafficnoisebyalmost50%!,OGFCsReduceNoiseandImproveVisibility,NoiseReductionOpenvsDenseGradedMixes,Source:NCHRP284,DOTsindicateastrongneedforpavementnoisecontrolstrategies.Properselectionofpavementsurfaceisthebestmethodtor

11、educenoisefrompavement/tireinteractions.,WhatCanBeDone?,OGFCisthequietestsurfacetype.(Wayson,NCHRPSynthesis268)SMAhasalsoproventobeaquietsurface.(WisconsinDOT,1993)DensegradedHMAsurfacesarequieterthanPCCpavements.(HibbsandLarson,ReportFHWA-SA-96-068,May1996),EffectofPavementSurface,NoiseMakesNews!,F

12、amiliesNearI-275islobbyingtheMichiganDOTforsoundabatement.In1999,MDOTrebuiltI-275withconcrete.Residentscontendtheprojecthasincreasenoiselevels.Levelshavebeenregisteredupwardsof90decibels.StevePhillipsofBerkshire,England-basedTRLLimitedspokeaboutEnglands10-yearplantoinstallquietersurfaceson60%ofmaintrunkroads.ThesurfaceswillbeSMAorOGFC.,Summary,Highwaynoiseisimportanttothepublic.SmallchangesindBlevelarenoticeable.Decreaseof9dB(A)reducesnoiseby50%Decreaseof3dB(A)islikedoublingdistance,Summary,Noisewallscanwork,but:Theyareexpensive.Theydontworkinal