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1、橋梁建設(shè)2014年第44卷第5期(總第228期)BridgeConstruction，Vo1．44，No．5，2014(TotallyNo．228)文章編號：1003—4722(2014)05—0118～05剛性系桿拱橋更換吊桿的施工監(jiān)控張西強，趙云強，陳慧。(1．中交路橋技術(shù)有限公司，北京100018；2．北京深華達交通工程檢測有限公司，北京102200)摘要：瓊州大橋主橋為(88+98+108+98+88)m下承式鋼管混凝土系桿拱橋，該橋5跨為互相獨立的無推力外部靜定體系，拱肋均為鋼管混凝土啞鈴形斷面，共118根吊桿，下錨
2、頭部位銹蝕程度嚴(yán)重的8根吊桿采用臨時兜吊系統(tǒng)進行更換施工。為保證吊桿更換施工中結(jié)構(gòu)受力合理及安全，采用吊桿內(nèi)力和橋面標(biāo)高雙控制原則，對吊桿更換過程進行施工監(jiān)控。利用MIDASCivi1軟件建立全橋有限元模型模擬吊桿更換施工，對吊桿拉力及橋面標(biāo)高進行分析。結(jié)果表明：更換吊桿后橋面各項指標(biāo)均在控制范圍以內(nèi)，且滿足橋梁設(shè)計規(guī)范要求。關(guān)鍵詞：拱橋；剛性系桿；吊桿更換；臨時兜吊系統(tǒng)；橋面標(biāo)高；吊桿拉力；有限元法；施工監(jiān)控中圖分類號：U448．22；U445．7文獻標(biāo)志碼：AConstructionMonitoringandControl
3、ofHangerReplacementofaRigidTiedArchBridgeZHANGXi—qiang，ZHAOYun—qiang，CHENHui。(1．CCCCRoadandBridgeConsultantsCo．，Ltd．，Beijing100018，China；2．BeijingShenhuadaTransportEngineeringTestingCo．，Ltd．．Beijing102200。China)Abstract：ThemainbridgeoftheQiongzhouBridgeisaconcrete—f
4、illedsteeltube(CFST)throughtiedarchbridgewithspanarrangement(88+98+108+98+88)m．The5-spanarchstructuresofthemainbridgearetheexternallystaticallydeterminatesystemsthataremutuallyindependentandarewithnothrust．ThecrosssectionsofthearchribsarealltheCFSTdumb—bell—shapesec
5、tionsandtherearetotally118hangersforthewholebridge．Ofthesehangers，8hangersthatwereseverelycorrodedatthepartsoftheirloweranchorheadswerereplaced，usingthetemporarybottom—carryingliftingsystem．Toensurethattheforceconditionsofthestruc—tureswerereasonableandsafeinthehang
6、erreplacementconstruction，theprincipleofdoublecontrolofthehangerinternalforcesandbridgedeckelevationwasadoptedandtheconstructionprocessofthehangerreplacementwasmonitoredandcontrolled．ThesoftwareMIDASCivilwasusedtoestablishthemodelforthewholebridge，thehangerreplaceme
7、ntconstructionwassimu—latedandthehangerinternalforcesanddeckelevationwereanalyzed．Theresultsshowthatthevariousindicesofthedeckafterthehangerreplacementarewithinthecontrolledrangesandcanmeettherelevantrequirementsofthebridgedesigncodes．Keywords：archbridge；rigidtiedme
8、mber；hangerreplacement；temporarybottom—carryingliftingsystem；deckelevation；hangertensileforce；finiteelementmethod；constructionmonito—ringa
