====Word行业资料分享--可编辑版本--双击可删====沥青路面结构设计的低成本structuralDesignofAsphaltPavementforLowCost农村道路RuralRoads源-于-网-络-收-集====Word行业资料分享--可编辑版本--双击可删====structuralDesignofAsphaltPavementforLowCostRuralRoadsIndevelopingcountries，ruralroadconstructionismostlycumberedbyshortageoffunds.Engineersconcernsmostinruralareasishowtobuildroadswhichnotonlycostlessbutalsomeetthetrafficdemands.EspeciallyinvastruralareasofChina,thereareagreatvarietyoftransportationpatterns,andthetrafficcompositionisverycomplex.Comparedwithothercountries，thetrafficcompositioninChinaruralareashaveitsownfeatures.Therefore，thereisnoexperienceabouttheruralroadsconstructionforreference.Inrecentyears，thecentralgovernmentofChinahasincreasedthestrengthforruralroadconstruction.Atthesame，alottimeofresearchesaboutruralroadconstructionhavebeendonebyresearchersinChina,andsomeconclusionsaboutchinaruralroadshavebeenmade.Intheauthors'opinion，theselectionofthepavementstructurematerialisthekeymeasuretoreducetheconstructioncostofruralroadsaftertheroutehasbeendetermined.Comparedwithconcretepavement，asphaltpavementrelativelycostslessandisthefirstchoiceforruralroadsinChina.Andthen，accordingtotheresearchachievementsaboutruralroadsconstruction，theauthorshavedonesomepreliminaryresearchesonthestructuredesignforlow-costasphaltpavementsforruralroads.1TrafficCompositionofRuralRoadRuralroadsincludecountyroads，townroadsandvillageroads.Thetrafficonruralroadsisusuallymixed.Onacountyroad,trafficvolumeisbetween300to1500veh/dinaverage，andinacountywithadevelopedeconomy，itreaches1000to2000veh/d.Thetrafficvolumebetweencountyandtownis100to300veh/d，andthetrafficvolumebetweentownsisusuallylessthan100to300veh/d.Inamixedtraffic，trucksflowaccountfor40%to70%ofthetrafficvolume,whicharemainlylighttruckscarryinglessthan2.5tons(includingagriculturalvehiclessuchaselectro-tricycles，walkingtractorsetc.)andmedium-sizetrucksof2.5to5tons.Mostoftheselightormediumtrucksareoverloaded.Theproportionof