主 講曾紹武 陜西鐵路工程職業(yè)技術(shù)-第 26 講 懸臂施工

主講：曾紹武

陜西鐵路工程職業(yè)技術(shù)學(xué)院第26講懸臂施工（2）《橋梁施工》精品資源共享課ExcellentresourcesharingcourseofbridgeconstructionLesson26cantileverconstructionSpeaker:ZengShaowuShaanxiRailwayEngineeringVocationalandTechnicalCollege

0號段懸臂澆筑段

合攏段懸臂施工邊跨現(xiàn)澆段

支架法、托架法掛籃施工法有支架施工法掛籃騎跨CantileverconstructionSection0BracketmethodCantileverpouringsectionHangingbasketconstructionmethodSidespancast-in-situsectionConstructionmethodwithsupportClosuresectionHangingbasketridingspan能力目標(biāo)能夠掌握懸臂施工掛籃組成與分類目標(biāo)１目標(biāo)２能夠掌握掛籃預(yù)壓的方法及作用目標(biāo)３掛籃安裝方法和順序懸臂施工2CapabilityobjectivesBeabletomasterthecompositionandclassificationofcantileverconstructionhangingbasketBeabletomasterthemethodandfunctionofhangingbasketpreloadingHangingbasketinstallationmethodandsequenceObjective1Objective2Objective3Cantileverconstruction2任務(wù)1.掛籃組成與類型任務(wù)2.掛籃預(yù)壓的作用及方法任務(wù)3.掛籃安裝的方法及順序本節(jié)任務(wù)資訊real-timeinfoTasksinthissectionTask1CompositionandtypeofhangingbasketTasksFunctionandmethodofhangingbasketpreloadingTask3Installationmethodandsequenceofhangingbasket滿堂架支架形式鋼管支架形式0號塊施工復(fù)習(xí)上節(jié)內(nèi)容ReviewtheprevioussectionConstructionofBlock0FullsupportformSteelpipesupportform

★掛籃構(gòu)造（前支點、后支點）梁橋用后支點→承重系統(tǒng)（主桁架、前后橫梁、）→懸吊系統(tǒng)（前后吊錨桿、綴板綴條）→行走系統(tǒng)（滑輪、牽引、后錨點轉(zhuǎn)換）→錨固系統(tǒng)（前后錨吊點）→模板系統(tǒng)（內(nèi)外模板）→施工作業(yè)平臺（前端、兩側(cè)）

五系統(tǒng)一平臺六個部分

任務(wù)1.掛籃組成與類型Task1CompositionandtypeofhangingbasketHangingbasketstructure(frontfulcrum,rearfulcrum)rearfulcrumforbeambridgeLoadbearingsystem(maintruss,frontandrearbeams)Suspensionsystem(frontandrearhanginganchorrods,battensandbattens)Travelingsystem(pulley,traction,rearanchorpointconversion)Anchoringsystem(frontandrearanchorliftingpoints)Formworksystem(internalandexternalformwork)Constructionoperationplatform(frontendandbothsides)Fivesystems,oneplatformandsixparts掛籃由承重結(jié)構(gòu)、懸吊系統(tǒng)、模板系統(tǒng)、行走系統(tǒng)、錨固限位系統(tǒng)、作業(yè)平臺六部分組成。(圖十一）三角形掛籃實體圖7前支點掛籃組成圖承重系統(tǒng)懸吊系統(tǒng)模板系統(tǒng)行走系統(tǒng)Thehangingbasketiscomposedofsixparts:load-bearingstructure,suspensionsystem,formworksystem,walkingsystem,anchorlimitsystemandoperationplatform.CompositiondiagramoffrontfulcrumhangingbasketLoadbearingsystemSuspensionsystemWalkingsystemTemplatesystem掛籃組成懸吊系統(tǒng)承重系統(tǒng)錨固限位系統(tǒng)CompositionofhangingbasketSuspensionsystemLoadbearingsystemAnchorlimitsystem類型結(jié)構(gòu)形式型鋼式、桁架式、斜拉式、弓弦式、滑動斜拉式、菱形平衡方式壓重式、錨固式和半壓重、半錨固式行走方式滾動式、滑動式和組合式掛籃的分類錨固方式后支點、前支點（牽索式）ClassificationofhangingbasketsTypestructuralstyleSectionsteeltype,trusstype,cable-stayedtype,bowstringtype,slidingcable-stayedtype,diamondBalancemodeBallasted,anchoredandsemiballasted,semianchoredWalkingmodeRolling,slidingandcombinedAnchoragemodeRearfulcrumandfrontfulcrum(cabletype)平行桁架式掛籃

平弦有平衡重掛籃

平弦無平衡重掛籃

FlatstringhangingbasketwithcounterweightFlatstringhangingbasketwithoutbalanceweight弓弦式掛籃

Bowstringhangingbasket

施工掛籃結(jié)構(gòu)形式主要采用菱形式，三角式哈大公司連續(xù)梁施工培訓(xùn)教材12Thestructuralformofconstructionhangingbasketmainlyadoptsrhombicformandtriangularform菱形掛籃Diamondhangingbasket哈大公司連續(xù)梁施工培訓(xùn)教材14三角掛籃Trianglehangingbasket前支點（牽索式掛籃）——用于斜拉橋Frontfulcrum(cable-stayedhangingbasket)-usedforcable-stayedbridge預(yù)壓作用：1.確保系統(tǒng)在施工過程中絕對安全和正常運行。2.通過預(yù)壓掌握掛籃的彈性變形和非彈性變形的程度和大小，更加準(zhǔn)確地掌握掛籃的剛度等力學(xué)性能指標(biāo)，借以指導(dǎo)掛籃的立模標(biāo)高，為施工監(jiān)控提供可靠的參照數(shù)據(jù)，確保主梁施工線型、標(biāo)高滿足設(shè)計和規(guī)范要求。3.同時針對掛籃施工時前端撓度主要是由于主桁件的變形引起的，試驗時要測出力與位移的關(guān)系曲線，作為施工時調(diào)整底模板的依據(jù)。

掛籃預(yù)壓：掛籃預(yù)壓形式Hangingbasketpreloading:hangingbasketpreloadingformPreloading:1.Ensuretheabsolutesafetyandnormaloperationofthesystemduringconstruction.2.Masterthedegreeandsizeofelasticdeformationandinelasticdeformationofthehangingbasketthroughpreloading,andmoreaccuratelymasterthemechanicalperformanceindexessuchasthestiffnessofthehangingbasket,soastoguidetheformworkelevationofthehangingbasket,providereliablereferencedataforconstructionmonitoring,andensurethattheconstructionlinetypeandelevationofthemainbeammeetthedesignandspecificationrequirements.3.Atthesametime,inviewofthefactthatthefront-enddeflectionduringtheconstructionofthehangingbasketismainlycausedbythedeformationofthemaintruss,therelationshipcurvebetweenoutputanddisplacementshallbemeasuredduringthetestasthebasisforadjustingthebottomformworkduringtheconstruction.預(yù)壓順序:模擬砼澆筑程序進行：底板→腹板→頂板.翼緣板。預(yù)壓荷載：選取最大梁段重量。預(yù)壓荷載分級：25%→50%→80%→120%。預(yù)壓方法：1、混凝土塊或砂袋預(yù)壓2、吊水箱預(yù)壓3、試驗臺法（千斤頂對拉）采用相同材料及工藝制作的掛籃，可僅預(yù)壓一只掛籃。Preloadingsequence:simulatetheconcretepouringprocedure:bottomplate→webplate→topplateFlangeplate.Preloadingload:selectthemaximumbeamsectionweight.Preloadingloadclassification:25%→50%→80%→120%.Preloadingmethod:1.Concreteblockorsandbagpreloading2.Preloadingofliftingwatertank3.Testbenchmethod(Jackpull)Forthehangingbasketmadeofthesamematerialandprocess,onlyonehangingbasketcanbepreloaded.混凝土塊預(yù)壓

Concreteblockpreloading砂袋預(yù)壓Sandbagpreloading吊水箱預(yù)壓試驗臺法TestbenchmethodPreloadingofliftingwatertank三角掛籃安裝順序：動畫演示Installationsequenceoftrianglehangingbasket:animationdemonstration

掛籃安裝：1.行走系統(tǒng)行走系統(tǒng)Hangingbasketinstallation:1WalkingsystemWalkingsystem掛籃安裝：2.安裝主桁架承重結(jié)構(gòu)主桁架Hangingbasketinstallation:2InstallationofmaintrussBearingstructureMaintruss掛籃安裝：3.安裝后錨系統(tǒng)后錨系統(tǒng)Hangingbasketinstallation:3InstallationofrearanchorsystemRearanchorsystem

掛籃安裝：4.懸吊系統(tǒng)（綴板、吊帶）懸吊系統(tǒng)Hangingbasketinstallation:4Suspensionsystem(batten,sling)Suspensionsystem安裝前后上下橫梁前上橫梁前下橫梁后下橫梁InstallthefrontandrearupperandlowercrossmembersFrontuppercrossmemberRearlowercrossmemberFrontlowercrossmember吊帶與外滑梁連接，安裝外滑梁外滑梁TheslingisconnectedwiththeouterslidingbeamandtheouterslidingbeamisinstalledExternalslidingbeam吊帶與內(nèi)滑梁連接，安內(nèi)滑梁內(nèi)滑梁內(nèi)滑梁TheslingisconnectedwiththeinnerslidingbeamtoinstalltheinnerslidingbeamInnerslidingbeamInnerslidingbeam安裝內(nèi)模板內(nèi)滑梁InnerslidingbeamInstallinnerformwork

掛籃安裝：5.模板系統(tǒng)及作業(yè)平臺Hangingbasketinstallation:5Formworksystemandoperationplatform

掛籃安裝：6.掛籃調(diào)整Hangingbasketinstallation:6Hangingbasketadjustment

掛籃安裝：7.固定后錨系統(tǒng)Hangingbasketinstallation:7Fixedrearanchorsystem掛籃組成與類型；掛籃預(yù)壓的作用及方法；掛籃安裝的方法及順序?？偨Y(jié)SummaryCompositiona