山区高速公路桥隧相连地段梁体预制、架设施工技术

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1、桥梁建设2012年第42卷第1期(总第211期)BridgeConstruction，Vo1．42。No．1，2012(TotallyNo．211)文章编号：1003—4722(2012)01—0118—05山区高速公路桥隧相连地段梁体预制、架设施工技术杨红亮(中铁二十一局集团公司，甘肃兰州730000)摘要：为解决山区高速公路桥隧相连地段梁体预制、架设难题，以济晋高速公路工程中桥隧相连地段梁体施工为例，介绍该工程中四里沟大桥和四里沟中桥的梁体预制及架设技术。通过梁体预制及架设方案比较，采用在隧道内预制梁方案，解决了隧道口无场地的问题；采用满堂支架配合人字

2、扒杆架梁方案，并通过合理利用现场地形和资源(隧道弃碴)，解决了架桥机无法在隧道口架梁的问题。该梁体预制、架梁施工技术适用于梁片数量少、梁体吨位大，隧道口距桥台尾距离小于10m，且采用架桥机架梁既困难成本又很高的桥隧相连地段。关键词：箱形梁；空心板梁；预制工艺；架设；满堂支架；桥梁施工中图分类号：U445．46文献标志码：AConstructionTechniquesforPrecastingandErectionofGirdersatConnectionSectionofExpresswayBridgeandTunnelinMountainousRegio

3、nYANGHong—liang(ChinaRailwayErshiyijuCivilEngineeringGroupCo．，Ltd．，Ianzhou730000，China)Abstract：Totackletheproblemofprecastinganderectionofgirdersattheconnectionsec—tionofexpresswaybridgeandtunnelinthemountainousregion，theconstructionofthegirdersattheconnectionsectionsofbridgesand

4、tunnelsofJiyuan—JinchengExpresswayProjectwascitedasanexampleandtheconstructiontechniquesforprecastinganderectionofthegirdersoftheSiliGullyBridgeandtheSillGullyMiddleBridgeoftheprojectwerepresented．Throughcomparisonoftheprecastinganderectionschemes，itwasdeterminedthatthegirdersther

5、eofwouldbepre—castinsidethetunnelsandtheproblemthattherewerenoconstructionsitesattheopeningsofthetunnelswassolved．Withtheutilizationofthestagingaidedbythestandingderricksandthera—tionalutilizationofthesitetopographyandresource(theabandonedbrokenstonesfromthetun—nels)，theproblemtha

6、ttheoverheadlaunchinggantrycouldnotbeusedforerectionofthegirdersattheopeningsofthetunnelswassolved．Theconstructiontechniquesherewithareapplicabletotheconnectionsectionofbridgeandtunnelwhenasmallnumberandlargetonnageofgirdersareprecastanderected，thedistancefromthebackofabutmenttoth

7、eopeningofthetunnelislessthan10mandtheutilizationoftheoverheadlaunchinggantryisdifficultandiscostly．Keywords：boxgirder；hollowslabgirder；precastingtechnology；erection；staging；bridgeconstrLlctjon收稿日期：2011—04—25作者简介：杨红亮，高级工程师，E—mail：yh1718@163．corl。研究方向：铁路与公路桥梁施工。山区高速公路桥隧相连地段梁体预制、架设施

8、工技术杨红亮1191引言的条件。通过现场调查拟定了2个预制梁方案：