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1、維普資訊http://www.cqvip.com第20096期年(總129月9)鐵道工程學(xué)報(bào)Dec20o6JOURNALOFRAILWAYENGINEERINGS0CIETYNO．9(Ser．99)文章編號：1006—2106(2006)09—0031—05非對稱連續(xù)梁橋設(shè)計(jì)與施工’陳建峰¨李慧君袁明游勵暉(鐵道第二勘察設(shè)計(jì)院，成都610031)摘要：研究目的：針對橋位地形要求，研究不對稱連續(xù)梁的設(shè)計(jì)特點(diǎn)和截面尺寸選擇的方法，研究不對稱連續(xù)梁合理的施工方法以保證梁體施工安全。研究方法：采用有限元程序?qū)Σ粚ΨQ連續(xù)梁進(jìn)行施工階段、運(yùn)營階段受力分析，選
2、定梁體截面尺寸及梁體懸臂灌注施工順序。研究結(jié)果：通過調(diào)整不對稱連續(xù)梁邊中跨梁高、截面尺寸，解決了不對稱連續(xù)梁內(nèi)力平衡，采用合理施工方法確保了不對稱連續(xù)梁施工安全，并且滿足了梁體線形要求。研究結(jié)論：根據(jù)橋位處要求及分析結(jié)果，大圓里雙線特大橋主橋采用52Ill+112Ill+64Ill不對稱連續(xù)梁，最小邊跨與主跨比僅為0．464，梁體曲線采用2種拋物線及不同梁高尺寸解決節(jié)段不平衡的問題，再以合理的梁體施工方法來保證施工安全。關(guān)鍵詞：大圓里；結(jié)構(gòu)不對稱；浙贛鐵路；預(yù)應(yīng)力混凝土連續(xù)梁中圖分類號：U442．5；U448．215文獻(xiàn)標(biāo)識碼：ADesignan
3、dConstructionofAsymmetricContinuousBeamBridgeCHENJian—fleng，LIHui—jim，YUANMing，YOULi—hui‘(TheSecondSurveyandDesignInstituteofChinaRailway，Chengdu，Siehuan610031，China)Abstract：Researchpurposes：Thepurposesofthispaperaretostudythedesignfeatures，themethodofdesigningthesectiondime
4、nsionandthereasonableconstructiontechniqueforasymmetriccontinuousbeamtoguaranteethesafetyofconstructionofbeamaccordingtotherequirementsoftopographyofthebridgesite。Researchmethods：Byusing3D—FEMsoftware，theanalysisismadeforpressureconditionsofasymmetriccontinuousbeamduringconst
5、ructionstageandservicestage，thesectiondimensionofbeamandtheconstructionsequenceforcantilevercastinginplacearedesigned．Researchresults：TheproblemofbalanceofinternalforcewithinbeamCanbesolvedbyadjustingthebeamheightandsectionsizesofsidespanandmainspanoftheasymmetriccontinuousbe
6、am，andthesafetyofconstructionofasymmetriccontinuousbeamcanbeguaranteedandtherequirementoflinerforbeamCanbemetbyadoptingreasonableconstructionmethod．Researchconclusions：Basedontherequirementsofbridgesiteandtheanalysisresultofthebridge，anasymmetriccontinuousbeamwiththemainspans
7、arrangedas(52+112+64)masymmetricspansisadoptedtothemainbridgeofDayuanlidoublelineextra—longbridge。TheratioofminimumsidespantomainspanWasonly0．464，andtheproblemofsegmentunbalanceCanbesolvedbyadoptingtwoparabolaforbeamcurveandtwodiferentheightsofbeam。Inaddition，app~eationofreas
8、onableconstructionmethodsCanguaranteetheconstructionsafety．Keywords：
