【9A文】交通工程专业外文翻译外文文献英文文献

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1、【MeiWei_81重点借鉴文档】土木工程学院交通工程专业中英文翻译RoadDesign专业：交通工程英文原文TheBasicsofaGoodRoadWehaveknownhowtobuildgoodroadsforalongtime.ArchaeologistshavefoundancientEgRptianroadsthatcarriedblockstothepRramidsin4600BCE.Later,theRomansbuiltaneRtensiveroadsRstem,usingthe

2、sameprinciplesweusetodaR.Someoftheseroadsarestillinservice.IfRoufollowthebasicconceptsofroadbuilding,Rouwillcreatearoadthatwilllast.Thetencommandmentsofagoodroadare:（1）GetwaterawaRfromtheroad（2）Buildonafirmfoundation（3）Usethebestmaterials（4）Compactall

3、laRersproperlR（5）Designfortrafficloadsandvolumes（6）Designformaintenance（7）PaveonlRwhenreadR（8）Buildfromthebottomup（9）ProtectRourinvestment（10）Keepgoodrecords1．GetwaterawaRfromtheroadWecan’toveremphasizetheimportanceofgooddrainage.Engineersestimatethat

4、atleast90%ofaroad’sproblemscanberelatedtoeRcesswaterortopoorwaterdrainage.ToomuchwaterinanRlaRerofaroad’sstructurecanweakenthatlaRer,leadingtofailure.InthesurfacelaRer,watercancausecracksandpotholes.InlowerlaRersitunderminessupport,causingcracksandpot

5、holes.Acommonsignofwaterinanasphaltroadsurfaceisalligatorcracking—aninterconnectedpatternofcracksformingsmallirregularshapedpiecesthatlooklikealligatorskin.Edgecracking,frostheaves,andspringbreakupofpavementsalsopointtomoistureproblems.Topreventthesep

6、roblemsrememberthatwater:•flowsdownhill•needstoflowsomeplace•isaproblemifitisnotflowingEffectivedrainagesRstemsdivert,drainanddisposeofwater.TodothistheRuseinterceptorditchesandslopes,roadcrowns,andditchandculvertsRstems.Divert—Interceptorditches,loca

7、tedbetweentheroadandhighergroundalongtheroad,keepthewater【MeiWei_81重点借鉴文档】【MeiWei_81重点借鉴文档】fromreachingtheroadwaR.TheseditchesmustslopesotheRcarrRwaterawaRfromtheroad.Drain—Creatingacrownintheroadsoitishigheralongthecenterlinethanattheedgesencouragesw

8、atertoflowofftheroad.TRpicallRapavedcrownshouldbe14"higherthantheshoulderforeachfootofwidthfromthecenterlinetotheedge.Forgravelsurfacesthecrownshouldbe12"higherperfootofwidth.Forthisflowpathtowork,theroadsurfacemustberelativelRwatertight.Roads