轨道交通直流框架保护与钢轨电位限制装置关系分析

28MODERNURBANTRANSIT3/2004293/2004MODERNURBANTRANSIT30MODERNURBANTRANSIT3/2004ABSTRACTSUrbanRailTransitProjectforWuhanCityXiongLing,WangChangyu4ThisarticleanalyzesandsummarizessomemethodsandspecialpointsintheresearchandplanningprocessfortheconstructionoftheurbanrailtransitsysteminWuhanCityandpresentsitssolutions.SearchforSolutiontoDevelopItsUrbanandSuburbanRailwayofXiÕanCitybyMakingUseofRegionalRailwaySystemHanZhenjiang,ZhangJianping8Thisarticleanalyzesthemajorproblemswiththeexistingurbanandsuburbanrailwayandthesignificancetodeveloptheurbanandsuburbanrailwaybymakinguseoftheregionalrailwaysystem.AndincontextofthespecificfeatureswithXiÕanrailwayhubplanning,thisarticleanalyzesthepossibilityandproblemsindevelopmentoftheurbanandsuburbanrailwaybymakinguseofrailwaysysteminXiÕanregion.DesignSolutionforChangpingBranchofBeijingBuiltbyMak-ingUseofExistingRailwaySystemMiXianfang11ThisarticleanalyzesthenecessityandfeasibilitytobuildChangpingBranch,anurbanrailtransitlinetobebuiltbymakinguseoftheexistingrailwaysystemandputsforwardthemaintechnicalcriteriaforthelineanddesignprincipleforthemajorequipment.DevelopmentandManufactureofEMUforBawangfeng-TongxianLineinBeijingGongMing,ZhouJianle,YangJihong15TheEMUdevelopedandmanufacturedforBawangfeng-TongxianLineofurbanrailtransitinBeijingisofBtype,intrainformationof2motorcarsand2trailers,withanti-impactframe.Thetractionsys-temofVVVFactransmissionsystemanddigital-analogelectricandaircombinedbrakingsystemofferquickreactionandfunctionofanti-slippingandanti-sliding.SpecialPointsandDevelopingTrendofBrakingSystemforUr-banRailTransitVehicleDingFeng19Thisarticlepresentsandanalyzesthetype,configuration,techni-calcharacteristicsandtrenddevelopingofthebrakingsystemfortheurbanrailtransitvehiclesinChina.UrbanRailVehicleTestFacilityBuiltwithTestLoopRunbyAcademyofRailwaySciencesDongXiangzhong,LiHong,DiaoBoren21ThetestfacilityforurbanrailvehiclebuiltwiththetestlooprunbytheAcademyofRailwaySciencesiscapableofcarryingouttestofvehicle,signaling,communication,andtrackstructureetc.,andoffersthefunctionofcomprehensivedetection.ReviewofMetroCommunicationSystemCuiJianle24Thisarticlepresentsconfigurationandfunctionofmetrocom-municationsystem,anditssubsystemsoftransmission,publicad-dressandclock,andputsforwardcommentsonsometechnicalproblems.AnalysisofRelationbetweenDCFrameProtectionandRailPo-tentialLimitDeviceTianShengli28Thisarticleanalyzesthespecialpointsofthetractiondcsupplysystemforurbanrailtransit,presentsthefunctionandworkingprin-cipleoftheframeprotection,railpotentiallimitdeviceetc.OnTechniqueofLargeAxialForcePileFoundationUnderpin-ningZhaoYouming,KeZaitian,ZhangShuzeng31Thisarticlerecommendstousetongueandgroove+anchorbar+pre-stressjointforbeam-columnconnectioninlargeaxialforcepilefoundationunderpinning,andthereliabilityofthejointwasveri-fiedwith1/2modeltest.Through1/4totalmodeltest,thesharerela-tionofunderpinningloadinunderpinningstructureandtheforce-transferregularityduringthecuttingofoldpileintheprocessofactiveunderpinningforlargeaxialforcepilefoundationarefound.Andtechnologyandparametersforactiveunderpinningareworkedout.Wheel-RailMatchandRailMaterialSelectionforUrbanRailTransitXieZhenguo,LiHaichuan35ThisarticlepresentstheCHN60railmaterialandshapeandhard-nessmatchbetweenwheelandrailusedinmetrolineconstruction.InvestmentControlinTenderingProcessofConstructionProjectZhaoYong38ThisarticleanalyzesÒunbalancedquotationsÓandconsequencethereofinbiddingforconstructionprojectsandpresentscountermea-suresfortheinvestorwhoinvitesbids,soastoeventuallyrealizefairandjusttenderingandreasonableinvestmentcontrol.SearchforWaterSupplyModeforFireFightingofUrbanRailTransitLiuAifang40Thisarticlesummarizesthedesignandpracticalexperienceofthewaterfireextinguishingsysteminthefacilityforurbanrailtransitandputsforwardthepointsdeservingattentionintheprocessofdesign.AnalysisandSearchforStudyApproachtoEnvironmentCon-trolSystemofUrbanRailTransitLiuYingjie,NaYanlin42CFD,calculatingfluiddynamicsisoneofthecomputer-aidedde-signtechniques.Itsfunctionistosimulatetemperatureandspeedfieldofaircurrentundervariousworkingconditions.ThisarticleanalyzesanddiscussesthepossibleapplicationoftheCFDtechniquetotheenvironmentcontrolsystemofurbanrailtransit.BuildupMetroIndustryandPromoteMetroEconomy___ThinkingwhileStudyingSpanishMetroLiPing45ReferringtothestudyofthedevelopmentofSpanishmetroandtherealityofthedevelopmentofChina'smetro,thisarticlesetsforththewriter'scomprehensionandpointsofviewonbuildingupmetroindustry,makingthepolicyfortheindustry,improvingtheconfigu-rationoftheindustry,tappingresourcesfortheindustry,strengthen-ingprojectmanagement,settinguptradeorganization,promotingmetroeconomyandsoon.