CRTSIII型板式无砟轨道建造全新理念

目录CONTENT一、总体研发思想Ⅰ、OverallResearchandDevelopmentThought二、技术特点Ⅱ、TechnicalCharacteristics（一）结构简单1.simplestructure（二）施工便捷2.convenientconstruction（三）稳定耐久3.stable＆durable（四）方便维修4.easymaintenance三、社会及经济效益Ⅲ、SocialandEconomicBenefits一、总体研发思想Ⅰ、OverallResearchandDevelopmentThoughts轨道交通是一种低碳、节能、环保的绿色交通。随着高速铁路时代的到来，为中国老百姓带来了更加方便、快捷、安全、舒适的出行选择。Railtransitisonekindoflow-carbon,energy-saving,environment-friendlygreentransportation.Withtheadventofhigh-speedrailwayage,itismoreconvenient,morecomfortable,saferandfasterforthecommonpeopletomakeatrip.而高速铁道无砟轨道发展的技术路线，实质上就是始终坚持不断地追求轨道的高平顺性，和轨道结构纵向刚度均匀化的连续性。这是确保高速列车安全性和舒适性最关键的核心技术。Thusthedevelopmentofhigh-speedrailwayballastlesstrack,infact,mainlyfocusesonhighsmoothnessfortheorbitandcontinuityoflongitudinalrigidityhomogenizationfortherailstructurewhicharethemostcrucialkeytechnologytomaintainthesecurityandcomfortabilityofhigh-speedtrain..因为，轨道几何尺寸的制造精度、安装误差和刚度变化是引起高速列车振动的根源。我们追求高速度的过程，就是不断的提高轨道精度和轨道结构刚度均匀性，不断克服振动的过程。Sincethemanufactureaccuracyoftherailgeometrysize,installationerrorsandrigiditychangearetherootcausetoresultinvibrationofhigh-speedtrain.Thatwepursuithighspeedistokeepimprovingtheprecisionandlongitudinalrigidityhomogenizationfortherailstructureandovercomingthevibrations.•CRTSIII型板式无砟轨道技术特点，正是针对上述技术关键，吸取了以往各类无砟轨道优点，从而研发的一种结构简单、施工便捷、稳定耐久、方便维修的全新无砟轨道结构。•Inviewofthekeytechniquesmentionedabove,thetechnicalcharacteristicsofCRTSⅢballastlesstrackwhichisdevelopedasakindofbrand-newballastlesstrackofsimplestructure,convenientconstruction,easymaintenance,stable＆durablehastheadvantageofallkindsofpreviousballastlesstrack.•总体的研发思想：就是“单元思路、纵连方式、双块受力”。其核心理论构架就是“路基纵连、桥隧单元、方便维修”。•TheoverallR＆DthoughtisUniteideas,Longitudinalcoupled,Double-blockforced.Itscoretheoreticalframeworkislongitudinal-coupledsubgrade,bridgeunit,easymaintenance.二、CRTSIII型板式无砟轨道技术特点Ⅱ、TechnicalCharacteristicsofCRTSⅢballastlesstrack（一）结构简单Ⅰsimplestructure1、结构组成1、structurecomposition-252-780-542-542-622-252-547自密实混凝土厚100mm支撑层厚240mm详图A2800隔离层L型卷材厚1.5mm轨道板厚190mm弹性垫层10mm3%3%3%3%轨道中心线钢轨176扣件38轨道板190自密实混凝土1002500支承层238500±0.0600承轨槽38路基基床表层路基基床底层SAMI厚80mm3100防水层轨道板：路基纵连，桥隧单元；Trackslab:longitudinal-coupledsubgrade,bridge＆tunnelunit填充调整层：自密实混凝土；Packedadjustmentlayer:self-compactingconcrete缓冲隔离层：与轨道板对应为单元；Bufferseparatinglayer:theunitcorrespondedwithtrackslab•底座及支承层：桥上单元，隧道内混凝土长单元（或直接采用隧底为基础），路基上为连续碾压混凝土；•Pedestalandsupportinglayer:bridgeunit,longunitofconcreteinsidethetunnel(ordirectlyadoptingthebottomofthetunnelasthefoundation),continuousrollingcompactionconcreteonthesubgrade•限位结构：门型筋+凹凸槽钢筋混凝土。•Spacingstructure:gatereinforcement+concave/convexgroove-shapedreinforcedconcrete其结构技术特点：TechnicalCharacteristics：（1）路基纵连结构(1)longitudinal-coupledsubgrade•路基结构是由散粒体填筑形成，路基表面刚度较小。若采用单元结构，列车通过时，由于路基表面刚度较低，对板端支承反力，约束力不够，板端竖向位移较大，形成振动源，对高速列车安全性和舒适性影响较大。•Thesubgradestructureismadeofgranularmaterialsandthesurfacerigidityofthesubgradeisrelativelylow.Iftheunitstructureisadopted,whenthetrainpassesonit,thesupportingforceattheendofslabandbindingforcearenotenoughsothattheverticaldisplacementattheendofslabiscomparativelylarge,becauseofthelowsurfacerigidityofthesubgrade,whichresultsinvibrationsourcethathasgreatinfluenceonthesafetyandconvenienceofthehigh-speedtrain.•纵连结构可有效分散板下应力集中，降低应力峰值，提高轨道结构的整体性，增大轨道结构的连续刚度，可最经济、最合理、最有效的克服路基表面刚度降低所带来的振动问题。•Thelongitudinal-coupledstructurecandistributestressconcentrationeffectivelyandreducestresspeaktoimprovetheintegrityoftherailstructureandincreaseitscontinuousrigidity.Anditcanmosteconomically,reasonably,andeffectivelysolvetheproblemsbroughtbythedecreasingsurfacerigidityofthesubgrade.•采用的是一种柔性的纵连结构。温升温降时，轨道板纵向可移动（具有单元自由伸缩效果），竖向受限则不能移动。若基础有沉降，柔性纵连结构有较强的跟随性。•Onekindofflexiblelongitudinal-coupledstructureisadopted.Atthetimeoftemperatureriseordrop,trackslabcanmovetowardsthelongitudinaldirection(theeffectoffreeunitexpansion),whereastheverticalmovementislimited.Iffoundationsettlementoccurs,flexiblelongitudinal-coupledstructurehasstrongfollowingperformance.（2）桥隧单元结构(2)bridgeandtunnelunitstructure•桥梁及隧底结构表面刚度较大，为轨道板采用单元结构提供了良好的条件。由于桥隧表面刚度大，对单元板端的约束力较强。•Thesurfacerigidityofbridgeandtunnelishigh,whichprovidefavorableconditionsfortheunitstructureappliedintotrackslab.Becauseofthehighsurfacerigidityofbridgeandtunnel,thebindingforceattheendofslabisstrong.列车通过时，板端竖向位移较小，产生的振动是安全、舒适可接受的范围内。Whilethetrainpassesby,theverticaldisplacementattheendofslabissmall.Andthevibrationcausedfromitiswithinthelimitofsafetyandcomfortability.•单元板结构不仅可简化桥上、隧内轨道结构，降低建造难度，而且还可降低造价。•Unitslabstructurecannotonlysimplifyupper-bridgeandinner-tunneltrailstructureandlowerthedifficultyofconstruction,butalsoreduceprojectcosts.•可最有效的克服连续结构受温度力造成的复杂问题等。•Theseriescomplexproblemsbroughtbycontinuousstructureundertemperatureforcecanbesolvedmosteffectively（3）自密实混凝土取代了CA砂浆(3)self-compactingconcretereplacementCAmortar•传统的CA砂浆调整层，只能提供极为有限的弹性，对轨道刚度过渡缓冲作用微小。•TraditionaladjustmentlayerofCAmortarcanonlyprovideverylimitedflexibilityandhaveaslighteffectonbufferingtransitionrigidityoftherailstructure.•传统的CA砂浆层与轨道板之间极易产生离缝等破损病害，给运营安全及维修带来了极大的危害和困难。•Somedamageslikecracksoccu