主 讲曾绍武 陕西铁路工程职施工课件讲解

主讲：曾绍武

陕西铁路工程职业技术学院第27讲悬臂施工（3）《桥梁施工》精品资源共享课"BridgeConstruction"qualityresourcesharingclassLecture27oncantileverconstruction(3)Speaker:ZengShaowu,ShaanxiRailwayEngineeringVocationalandTechnicalCollege

0号段Section0悬浇段Suspensionsection

合拢段Closethesegment悬臂施工边跨现浇段Sideacrossthecast-in-placesection

支架法、托架法挂篮施工法Hangingbasketconstructionmethod有支架施工法Thereisabracketconstructionmethod挂篮骑跨HangbasketridecrosscantileverbeintheprocessofconstructionSupportmethod,bracketmethod悬臂浇筑段施工任务Constructiontaskofthecantileverpouringsection

1one挂篮施工工艺流程Constructionprocessofhangingbasket

2two

3three施工设备选用及注意问题Constructionequipmentselectionandpayattentiontotheproblems施工过程实施方案Constructionprocessimplementationplan任务1：挂篮施工工艺Task1:Constructiontechnologyofhangingbasket子任务1.挂篮施工工艺流程？Sub-task1.Hangingbasketconstructionprocess?解析子任务1：悬臂浇筑段施工工序Parsethesub-task1:theconstructionprocessofthecantileverpouringsection

挂篮试压Hangbaskettestpressure

安装挂篮Installthehangingbasket

调整模板系统Adjustthetemplatesystem

绑扎钢筋预留孔道BreservereinforcementPouringconcrete浇筑混凝土

养护拆模Maintenanceandmoldremoval穿束张拉预应力筋Wearthebundleintensionandpulltheprestressedtendons压浆封端Pressureslurrysealingend

挂篮移动HangbasketmoveHangbasketmove任务2：预应力钢筋布置方案Task2:Arrangementschemeofprestressedreinforcement子任务1.三向预应力钢筋位置及作用？1.Positionandfunctionofthree-wayprestressedreinforcement?子任务2.预应力定位方法措施？Sub-task2.Prestresspositioningmethodsandmeasures?1.1纵向预应力钢筋位置及作用？1.1Locationandfunctionoflongitudinalprestressedreinforcement?子任务1.1解析：纵向预应力沿着梁体纵向布置，主要抵抗纵向弯矩，钢丝束。

Sub-task1.1Analysis:Thelongitudinalprestressisarrangedverticallyalongthebeambody,mainlyresistingthelongitudinalbendingmomentandthesteelwirebeam指出图中竖向形式及作用？子任务1.2竖向预应力钢筋位置及作用？Sub-task1.2Positionandfunctionofverticalprestressedreinforcement?子任务1.2解析：竖向预应力沿着梁体竖向布置，主要抵抗剪力，精轧螺纹钢。Sub-task1.2Analysis:verticalprestressisarrangedverticallyalongthebeambody,mainlyresistingshear,finerolledrebar.子任务1.3.横向预应力钢筋类型及作用？1.3.Typeandfunctionoftransverseprestressedreinforcement?子任务1.3解析：横向预应力沿着梁顶翼缘板横向布置，主要抵抗横向弯矩，扁锚钢绞线。Sub-task1.3Analysis:Horizontalprestressisarrangedhorizontallyalongthebeamtopflangeplate,mainlyresistingthehorizontalbendingmomentandflatanchorsteelstrand.预应力钢筋怎么保证位置？子任务2.预应力钢筋定位方法措施？Sub-task2.Positioningmethodandmeasuresofprestressedreinforcement?子任务2解析：定位钢筋和架立钢筋。Sub-task2analysis:positioningsteelbarsanderectingsteelbars.预应力管道位置Prestressedpipelocation

任务3.预应力钢筋张拉实施

方案及设备选用Task3.Implementationplanoftensioningofprestressedreinforcementandequipmentselection子任务1.预应力钢筋张拉方法？

Sub-task1.Thetensionmethodofprestressedreinforcement?子任务3.预应力张拉双控含义？Sub-task3.Themeaningofprestressedtensionanddoublecontrol?子任务2.预应力钢筋张拉所用设备？Sub-task2.Equipmentforprestressedreinforcement?子任务4.预应力钢筋张拉安全控制要求？

Sub-task4.Safetycontrolrequirementsofprestressedreinforcementtension?子任务1-2解析:双端整体一次性张拉设备：穿心式千斤顶，油压表。Sub-task1-2analysis:dual-endoveralldisposabletensionequipment:heart-piercingjack,oilpressuregauge.子任务3-4解析：应力控制和伸长量控制安全要求：千斤顶校核，控制张拉速度和张拉力，张拉后端不能站人。Sub-task3-4analysis:stresscontrolandelongationcontrolsafetyrequirements:jackcheck,controlthetensionspeedandtension,thetensionbackendcannotstandpeople.张拉设备安放Placementoftensioningequipment

横向预应力张拉Transverseprestressedtension

竖向预应力张拉Verticalprestressedtension

切割工作长度Cutworkinglength

封端、压浆Enclosure,grouting移动挂篮Mobilehangingbasket

移动挂篮Mobilehangingbasket

逐段悬臂浇筑直到合拢段Placecantileveruntilclosed挂篮悬臂浇筑施工工艺Constructiontechnologyofhangingbasketcantileverpouring

挂篮前移Hangthebasketforward挂篮调整锚固管道布置pipinglayout砼灌注Concreteperfusion预应力张拉Prestressedtension孔道压浆Holepressureslurry悬臂浇筑施工工艺Hangingarmpouringconstructiontechnology悬臂浇筑段施工工艺；Constructiontechnologyofthecantileverpouringsection;三向预应力钢筋位置和作用；Positionandactionofthree-wayprestressedreinforcement;预应力张拉的要求、双控含义；Requirementsofprestressedtensionandthemeaningofdoublecontrol;安全控制的要求。Safetycontrolrequirements.总结sumup(1)桥墩施工情境：30+45+30m连续梁桥，矩形桥墩，柱高16-30m，桥下无水。要求编制悬臂施工方案，制定相应的实施工艺和设备选用及质量控制措施。(1)Pierconstructionsituation:304530mcontinuousbeambridge,rectangularpier,columnheight16-30m,nowaterunderthebridge.Itisrequiredtopreparethecantileverconstructionplan,andformulatethecorrespondingimplementationprocessandequipmentselectionandqualitycontrolmeasures.(2)绘制悬臂施工工艺流程图(2)Drawtheconstructionprocessflowchartofthecantilever作业卡片jobcard关键：根据桥梁