下承式钢管拱桥--空间倾斜系杆拱拱肋吊装技术

《下承式钢管拱桥--空间倾斜系杆拱拱肋吊装技术》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、80桥梁建设2010年第6期文章编号：1003～4722一(2010)06—0080—04下承式钢管拱桥空间倾斜系杆拱拱肋吊装技术辛俊红，杨超(1．太原市市政公用工程质量监督站，山西太原030012；2．中铁大桥局第三工程有限公司，广东广州510800)摘要：太原南中环桥主桥为主跨180m的下承式倾斜钢管拱结构，主、副拱向外侧倾斜。钢管拱采用大型履带吊机配合支架法施工，吊装顺序为先上游侧后下游侧，先主拱再副拱。每条拱肋划分为5个吊装节段和1个嵌补段。为方便吊装及安装就位，吊装前，通过计算确定吊点位置与吊绳长度。由于是倾斜起吊，吊装时须进行2个方向的旋转，首次栓绳使拱肋由水平横卧旋转至竖直，二次

2、拴绳使拱肋由纵向水平旋转至需要角度。在气温较低的时段吊装嵌补段。施工中重点注意吊装安全及线形控制。实践证明该桥的吊装技术切实可行。关键词：拱桥；下承式桥；系杆拱；拱肋；吊装；桥梁施工中图分类号：U448．22；U445．46文献标志码：AHoistingandInstallingTechniquesforArchRibsofSpatiallyInclinedTiedArchesofaThroughSteelTubeArchBridgeXINJun-hong，YANGChao。(1．TaiyuanCityQualitySupervisionStationofMunicipalEngineerin

3、g，Taiyuan030012，China；2．The3rdEngineeringCo．，Ltd．，ChinaRailwayMajorBridgeEngineeringGroup，Guangzhou510800，China)Abstract：ThemainbridgeoftheSouthMiddleRingRoadBridgeinTaiyuanCityisathroughsteeltubearchstructurewithamainspan180mandthemainandauxiliaryarchribsofthestructureareinclinedoutwards．Thearchrib

4、swerehoistedandinstalledbylargecaterpillarcranebytheaidofscaffolding．Theproceduresoftheconstructionwerethatthearchribsontheupstreamsidewerehoistedandinstalledfirstandtheribsonthedownstreamsidelate。themainarchribsfirstandtheauxiliaryribslate．Eacharchribwasdividedinto5blocksplusabuilt—inblock．Tofacili

5、tatethehoistingandinstallingoftheribsinplace，beforetheribswerehoisted，thepositionsofthehoistingpointsandthelengthofthehoistingropesweredeterminedthroughcalculation．Becausetheribswerehoistedinainclinationway，theribshadtOberotatedintwodirectionsduringthehoisting．TheropeswereconnectedtOtheribsforthefir

6、sttimetohoisttheribsfromthehorizontallylyingpositiontotheverticalpositionandconnectedtotheribsforthesecondtimetohorizontallyrotatetheribstotherequiredanglesfromthelongitudinaldirection．Thebuilt。-inblocksweretheninstalledintheperiodoflowtemperatureandthekeypointsofat——tentionintheconstructionwerethes

7、afetyandgeometricshapecontro1．Practiceprovedthatthehoistingandinstillingtechniquesforthebridgewerepracticalandfeasible．Keywords：archbridge；throughbridge；tiedarch；archrib；hoistingandinstalling；bridgeco