强烈推荐12标项目施工组织设计施工方案文字说明Word文档下载推荐.docx
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预制梁运输用轨道平车运输,用架桥机安装。
现浇连续箱梁采用满堂支架现浇。
2.2.3.2.4.BridgeSuperstructureConstruction
Themainlinebridgetendersoftheupperstructureofthebeamis25m,40mpost-tensionedT-beam,theupperbeamoverpassstructureofthebeamis25mpost-tensionedboxgirder,30mpost-tensionedT-beamandcontinuouscast-in-placeBoxGirder.Inaccordancewiththeactualsituationatthescene,ineachbridgetoinstallprefabricatedbridgemarket,tobethebridgeroadbedbasicallyshapedaftertheprefabricated,accordingtothenumberofprefabricatedbaseofprecastbeamfilmsandTimerequested.Liangtemplateusingprefabricatedstereotypesmassivesteelform.Railtransportusingprecastbeamflatcartransport,usebridgingmachineinstallation.Continuoususeofcast-in-placeboxgirderstentpackedcast-in-place.
2.2.3.2.4.1预制梁施工与安装
1.后张法梁体预制:
①.底模制作
将计划设置的预制场的场地先给以平整规划,而后按规划位置和设计尺寸预制底模。
底模中间基础采C20素砼浇灌,底座顶面铺设1cm厚钢板,于起吊位置设活动底模,便于起吊运输。
2.2.3.2.4.1precastbeamconstructionandinstallation
1.Post-beamofprefabricated:
①.Dieattheendoftheproduction
Planstosetupprefabricatedfieldvenuetolevelingplangivenfirst,thentheplanninganddesignpositionattheendofprefabricatedmodulussize.AttheendofintermediatemodulusbasedminingC20-concretewatering,thebaseofthetopplatelaying1cmthick,inliftingthepositionoftheendofDieactivities,facilitatetheliftingtransport.
②.绑扎钢筋
钢筋在加工场统一加工,然后运到现场绑扎成型。
绑扎时要根据预应力管道的规格,按照钢绞线设计横、竖坐标准确定位波纹管位置,中间接头处要严密包裹,以防脱落、漏浆。
最后在两侧绑扎砼保护层垫块。
②.BandingReinforced
Reinforcedinprocessingunifiedprocessing,thentransportedtothescenebandingmolding.Bandingprestressedpipeline,accordingtothespecifications,accordingtoStranddesign,closetothemiddleconnectorparcelstopreventfallingoutofleakagepulp.Finallyonbothsidesbandingconcreteprotectivelayer垫块.
③.支模
模板采用定型钢模边模(每5m装附着式震捣器1个),上下用Φ16钢筋拉杆紧固,外侧用斜撑支护以防止变形。
③.BranchDie
Template-modulususingstereotypessteelform(each5mattachedearthquakedestroyedtheequipmentofone),fromtoptobottomwithΦ16steelrodfastening,lateralsupportwithdiagonalbracingtopreventdeformation.
④.浇注砼
预应力砼根据经设计配合比调整后的施工配合比,由搅拌站集中厂拌,砼搅拌车运输,人工入模。
浇注时自两头向中间分层连续浇注,并使砼表面形成45度斜面。
振捣时采用插入式振动棒配合附着式震捣器进行振捣,做到密实均匀,无漏振、过振。
在振动过程中注意保护波纹管,严禁振动棒碰撞预应力管道和预埋件等。
④.PouringConcrete
AccordingPrestressedConcreteMixDesignConstructionadjustedMixbymixingstationMixingPlant,concretetruckmixertransport,artificialtodie.Pouringtimesincetwocontinuouscastingtothecenterstratification,andconcretesurfaceof45-degreeslant.Vibratedwhenusedwithplug-vibrationbarattachedearthquakedestroyedthevesselsvibratedsodenseuniformandseamlessvibration,thevibration.Vibrationintheprocessoftheneedtoprotectthebellows,no-vibrationbarcollisionprestressedpipelineandembeddedparts,andsoon.
⑤.张拉、灌浆、封锚
砼浇注完成后,采用麻袋覆盖洒水养护,24小时后即可脱模;
然后按设计根数沿预埋的预应力管道穿钢绞线。
当梁体砼强度达到设计强度的90%后即进行预应力张拉。
⑤.Tension,grouting,boltclosure
Concretepouringcompleted,theuseofsprinklercoverageconservationsacks,24demoulding;
rootandclickonthedesignofprestressedfewembeddedalongthepipelinewearStrand.Whenthebeamofconcretestrengthtomeetthedesignstrengthof90percentafteraprestressedtension.
张拉前要彻底清洗孔道和锚具,清洗预应力钢材端部。
张拉采用两台200t油压千斤顶从两端同时进行,张拉时,在张拉区域应设置明显的标志和安全防范措施,确保施工安全。
在张拉过程中,实行张拉力和延伸量双控。
严格控制张拉时间和张拉应力,认真记录伸长量和张拉力,达到设计和规范要求。
TensionchannelscleanedthoroughlybeforeandAnchorage,cleaningprestressedsteelend.Tensionusingtwo200t,thetensionintheregionshouldsetupclearsignsandsecuritymeasurestoensureconstructionsafety.Tensionintheprocessofimplementationoftensionandextenddualcontrol.Tensionstrictlycontrolthetimeandtensionstress,elongationandmeticulouslyrecordedtensiontothedesignandspecifications.
经监理工程师验收后,开始对预应力管道进行压浆:
用压浆机从锚头预留孔中压入拌好的水泥浆。
压浆应从一端向另一端连续进行,不可间断,持续压浆直至另一端饱和出浆(排气孔排出与规定稠度相同的水泥浆),并持压10分钟。
然后用砂轮切割机切断预留钢绞线后封锚。
预应力管道内水泥浆强度达到设计要求后方可吊装。
Acceptancebythesupervisingengineerafterthestartofprestressedpipelinebegrouted:
groutedbolt-fromthefirstthereservepressedinto拌好waterslurry.Groutingfromoneendtotheotherendofarow,cannotbestopped,andsustaineduntiltheotherendofsaturatedGroutingaslurry(exhaustventfromthesameconsistencywiththeprovisionsofslurry),andapressure10minutes.ThenWheelcuttingmachinecutoffaftertheclosurereservedStrandanchor.Prestressedslurrypipelinestrengthtomeetthedesignrequirementsbeforethe
Iintendtousethecompanyself-developedbridgingtheDF15050Ⅲtypeofinstallation,thebridgemachineisanewtypeofadjustableSpan,theElectricalandMechanicalunitloadtelopingdebugging,testin