主 講曾紹武 陜西鐵路工程職施工課件講解

主講：曾紹武

陜西鐵路工程職業(yè)技術(shù)學(xué)院第27講懸臂施工（3）《橋梁施工》精品資源共享課"BridgeConstruction"qualityresourcesharingclassLecture27oncantileverconstruction(3)Speaker:ZengShaowu,ShaanxiRailwayEngineeringVocationalandTechnicalCollege

0號(hào)段Section0懸澆段Suspensionsection

合攏段Closethesegment懸臂施工邊跨現(xiàn)澆段Sideacrossthecast-in-placesection

支架法、托架法掛籃施工法Hangingbasketconstructionmethod有支架施工法Thereisabracketconstructionmethod掛籃騎跨HangbasketridecrosscantileverbeintheprocessofconstructionSupportmethod,bracketmethod懸臂澆筑段施工任務(wù)Constructiontaskofthecantileverpouringsection

1one掛籃施工工藝流程Constructionprocessofhangingbasket

2two

3three施工設(shè)備選用及注意問題Constructionequipmentselectionandpayattentiontotheproblems施工過程實(shí)施方案Constructionprocessimplementationplan任務(wù)1：掛籃施工工藝Task1:Constructiontechnologyofhangingbasket子任務(wù)1.掛籃施工工藝流程？Sub-task1.Hangingbasketconstructionprocess?解析子任務(wù)1：懸臂澆筑段施工工序Parsethesub-task1:theconstructionprocessofthecantileverpouringsection

掛籃試壓Hangbaskettestpressure

安裝掛籃Installthehangingbasket

調(diào)整模板系統(tǒng)Adjustthetemplatesystem

綁扎鋼筋預(yù)留孔道BreservereinforcementPouringconcrete澆筑混凝土

養(yǎng)護(hù)拆模Maintenanceandmoldremoval穿束張拉預(yù)應(yīng)力筋Wearthebundleintensionandpulltheprestressedtendons壓漿封端Pressureslurrysealingend

掛籃移動(dòng)HangbasketmoveHangbasketmove任務(wù)2：預(yù)應(yīng)力鋼筋布置方案Task2:Arrangementschemeofprestressedreinforcement子任務(wù)1.三向預(yù)應(yīng)力鋼筋位置及作用？1.Positionandfunctionofthree-wayprestressedreinforcement?子任務(wù)2.預(yù)應(yīng)力定位方法措施？Sub-task2.Prestresspositioningmethodsandmeasures?1.1縱向預(yù)應(yīng)力鋼筋位置及作用？1.1Locationandfunctionoflongitudinalprestressedreinforcement?子任務(wù)1.1解析：縱向預(yù)應(yīng)力沿著梁體縱向布置，主要抵抗縱向彎矩，鋼絲束。

Sub-task1.1Analysis:Thelongitudinalprestressisarrangedverticallyalongthebeambody,mainlyresistingthelongitudinalbendingmomentandthesteelwirebeam指出圖中豎向形式及作用？子任務(wù)1.2豎向預(yù)應(yīng)力鋼筋位置及作用？Sub-task1.2Positionandfunctionofverticalprestressedreinforcement?子任務(wù)1.2解析：豎向預(yù)應(yīng)力沿著梁體豎向布置，主要抵抗剪力，精軋螺紋鋼。Sub-task1.2Analysis:verticalprestressisarrangedverticallyalongthebeambody,mainlyresistingshear,finerolledrebar.子任務(wù)1.3.橫向預(yù)應(yīng)力鋼筋類型及作用？1.3.Typeandfunctionoftransverseprestressedreinforcement?子任務(wù)1.3解析：橫向預(yù)應(yīng)力沿著梁頂翼緣板橫向布置，主要抵抗橫向彎矩，扁錨鋼絞線。Sub-task1.3Analysis:Horizontalprestressisarrangedhorizontallyalongthebeamtopflangeplate,mainlyresistingthehorizontalbendingmomentandflatanchorsteelstrand.預(yù)應(yīng)力鋼筋怎么保證位置？子任務(wù)2.預(yù)應(yīng)力鋼筋定位方法措施？Sub-task2.Positioningmethodandmeasuresofprestressedreinforcement?子任務(wù)2解析：定位鋼筋和架立鋼筋。Sub-task2analysis:positioningsteelbarsanderectingsteelbars.預(yù)應(yīng)力管道位置Prestressedpipelocation

任務(wù)3.預(yù)應(yīng)力鋼筋張拉實(shí)施

方案及設(shè)備選用Task3.Implementationplanoftensioningofprestressedreinforcementandequipmentselection子任務(wù)1.預(yù)應(yīng)力鋼筋張拉方法？

Sub-task1.Thetensionmethodofprestressedreinforcement?子任務(wù)3.預(yù)應(yīng)力張拉雙控含義？Sub-task3.Themeaningofprestressedtensionanddoublecontrol?子任務(wù)2.預(yù)應(yīng)力鋼筋張拉所用設(shè)備？Sub-task2.Equipmentforprestressedreinforcement?子任務(wù)4.預(yù)應(yīng)力鋼筋張拉安全控制要求？

Sub-task4.Safetycontrolrequirementsofprestressedreinforcementtension?子任務(wù)1-2解析:雙端整體一次性張拉設(shè)備：穿心式千斤頂，油壓表。Sub-task1-2analysis:dual-endoveralldisposabletensionequipment:heart-piercingjack,oilpressuregauge.子任務(wù)3-4解析：應(yīng)力控制和伸長量控制安全要求：千斤頂校核，控制張拉速度和張拉力，張拉后端不能站人。Sub-task3-4analysis:stresscontrolandelongationcontrolsafetyrequirements:jackcheck,controlthetensionspeedandtension,thetensionbackendcannotstandpeople.張拉設(shè)備安放Placementoftensioningequipment

橫向預(yù)應(yīng)力張拉Transverseprestressedtension

豎向預(yù)應(yīng)力張拉Verticalprestressedtension

切割工作長度Cutworkinglength

封端、壓漿Enclosure,grouting移動(dòng)掛籃Mobilehangingbasket

移動(dòng)掛籃Mobilehangingbasket

逐段懸臂澆筑直到合攏段Placecantileveruntilclosed掛籃懸臂澆筑施工工藝Constructiontechnologyofhangingbasketcantileverpouring

掛籃前移Hangthebasketforward掛籃調(diào)整錨固管道布置pipinglayout砼灌注Concreteperfusion預(yù)應(yīng)力張拉Prestressedtension孔道壓漿Holepressureslurry懸臂澆筑施工工藝Hangingarmpouringconstructiontechnology懸臂澆筑段施工工藝；Constructiontechnologyofthecantileverpouringsection;三向預(yù)應(yīng)力鋼筋位置和作用；Positionandactionofthree-wayprestressedreinforcement;預(yù)應(yīng)力張拉的要求、雙控含義；Requirementsofprestressedtensionandthemeaningofdoublecontrol;安全控制的要求。Safetycontrolrequirements.總結(jié)sumup(1)橋墩施工情境：30+45+30m連續(xù)梁橋，矩形橋墩，柱高16-30m，橋下無水。要求編制懸臂施工方案，制定相應(yīng)的實(shí)施工藝和設(shè)備選用及質(zhì)量控制措施。(1)Pierconstructionsituation:304530mcontinuousbeambridge,rectangularpier,columnheight16-30m,nowaterunderthebridge.Itisrequiredtopreparethecantileverconstructionplan,andformulatethecorrespondingimplementationprocessandequipmentselectionandqualitycontrolmeasures.(2)繪制懸臂施工工藝流程圖(2)Drawtheconstructionprocessflowchartofthecantilever作業(yè)卡片jobcard關(guān)鍵：根據(jù)橋梁