尼日利亚阿布贾城铁辅轨方案分析

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1、西南交通大学硕士研究生学位论文第1I页AbstractTherearemanycitiesaroundtheworldtodevelopurbanrailtransitsystempresently,comparedtothenationalrailway,highway,waterconservancyfacilities，buildingconstructionandotherinfrastructure，theurbanrailtransitsystemwasstartingtoomuchlate，Coupledwit

2、hlandresourcesinthemajorcitiesaroundtheworldareveryvaluableaswell，SOindi街cultconditions，itisdimculttoavoidtoadoptthesharpcurvesofthelineconditiontoacrosstheneighborhoodofexistingbuildingsandsteepgradienttoreducethequantitiesoffillingorcuaingofformation．Comparedtona

3、tionalrailwaylinksystem，theurbanrailwaysystemthatmainlyformedbytheballasttrackfollowinggroundsurfaceasakindofurbanrailtransitsystemhavesomeuniquetrafficcharacteristicsandlineconditions，suchassteepslope，andsharpcurve，sothepastconstructionexperienceofthenationalrailw

4、ay,suchasadirectlylayingCWRmethodtolaynewCWRtrack,willencounteralotofproblemsiftheabovementionedmethod，suchasadirectlylayingCWRmethodtolaynewCWRtrack，wereappliedinurbanrailway．WiththereferencetOtheconstructionexperienceofAbujaUrbanRailwayinNigeria，essentialityandex

5、istingproblemsofAdoptingLayingSingleSleeperandPushingLWRMethodtolayCWRinballasttrackfollowinggroundsurfaceofurbanrailwaywerediscussedandanalysedinthispaper,thetypeofandrequirementsforconstructionmachinerythatwillbeadopedwereworkedoutinadvance，theoreticalcalculation

6、sontheabovementionedissuesthatwillbeencounteredbysteepgradientandsharpcurveduringCWRtrackconstructionbytheheavydutymachineryandequipmentsinurbanrailwaywerecarriedout．WiththeabovementionedSupportingandactualoperationalresearchtOdevelopasetofconstructiontechnologyand

7、technicalstandardsfortheballasttrackofurbanrailway,andgraduallyformsuitableforurbanrailwayanditsengineeringcharacteristicsoftheactualneedsoftheconstructionmethod．ThenewconstructionmethodofLayingSingleSleeperandPushingLWRMethodtolaynewCWRtrackdirectlyadoptedbyAbujau

8、rbanrailwayinNigeria，isausefulattempttolayCWRinballasttrackfollowinggroundsurfaceofurbanrailway,thisnewCWRtracklayingconstructionmethodtosolvemai