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时间:2017-11-25
《钢箱梁拼装及桥位焊接的监理》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、桥梁建设2009年增刊2文章编号:1003—4722(2009)S2一Ol1O—O4钢箱梁拼装及桥位焊接的监理穆金禄(中铁大桥局集团桥科院有限公司,湖北武汉430034)摘要:为使钢箱梁桥位焊接后能符合设计给定的线形,从预拼装阶段开始,控制各项工序的质量。钢箱梁的制造和预拼装可分为长线法和短线法。悬索桥的钢箱梁吊装时,钢箱梁的空间位置由主缆线形和吊索长度确定,钢箱梁吊装后其线形已经确定,不可能在吊装过程中或吊装后再行调整;而斜拉桥则在钢箱梁吊装时,通过施工监控逐个调整吊装梁段的索力、远点的标高和里程实现设计给定的线形。介绍斜拉桥钢箱梁吊装过程中吊装梁段的调整方法、合龙段
2、吊装前后的注意事项。以西堠门大桥为例,说明钢箱梁桥位焊接施工期的监理要点。关键词:钢箱梁;拼装;吊装;焊接;监理中图分类号:U445.1文献标志码:ASupervisionofAssemblingandBridgeSiteWeldingofSteelBoxGirderMUdin-lu(BridgeScienceResearchInstituteLtd.,ChinaZhongtieMajorBridgeEngineeringGroup,Wuhan430034,China)Abstract:Toensurethatthesteelboxgirderweldedatbridg
3、esitecanmeetitsdesignedge—ometry,thequalityofvariousworkingproceduresforthegirdershouldbewellcontrolledfromtheearlystageofpre—assembling.Asteelboxgirdercanbemanufacturedandpre—assembledei—therbythelonglineorshortlinematchmethod.Fortheliftingandinstallationofthesteelboxgirderofasuspension
4、bridge,thespatialpositionofthegirderisdeterminedbythegeometryofthemaincablesandlengthOfthesuspenders。Oncethegirderisinstalled,thegeometryofthegirderhasalreadybeendeterminedanditisimpossibletofurtherreadjustthegeometryofthegirderduringorafterinstallationofthegirderwhilefortheinstallationo
5、fthesteelboxgirderofacable—stayedbridge,thedesignedgeometryofthegirderisgenerallyrealizedthroughadjust—mentofthecableforces,far-pointelevationandmileageofeachinstalledgirderblockbymeansofconstrUCtionmonitoringandcontro1.Themethodsforadjustmentoftheinstalledgirderblocksincourseofinstallat
6、ionofthesteelboxgirderofthecable-stayedbridgeandmattersofattentionbe—foreandaftertheinstallationoftheclosureblockofthebridgearepresented.BywayofexampleofXihoumenBridge,severalkeypointsofthesupervisionduringtheweldingconstructionofthesteelboxgirderatbridgesitearenarrated.Keywords:steelbox
7、girder;assembling;liftingandinstallation;welding;supervision1前言设计给定的线形,必须从预拼装阶段开始,严格控制为保证钢箱梁桥位焊接后,钢箱梁的线形符合预拼装等各工序的质量。相应的监理工作主要有预收稿日期:2009—05—11作者简介:穆~(1940-),男,教授级高工,1964年毕业于唐山铁道学院应用力学专业(mjl1940@126.com)。钢箱梁拼装及桥位焊接的监理穆金禄111拼装阶段的控制、吊装时的线形控制、焊前准备和焊些牙板上组装钢箱梁,可以使制造和预拼装一次完接时机、
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