港珠澳大桥深水区非通航孔桥大节段钢箱梁施工全过程控制

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1、桥梁建设2015年第45卷第5期(总第234期)112BridgeConstruction，Vo1．45，No．5，2015(TotallyNo．234)文章编号：1003—4722(2015)05—0112—05港珠澳大桥深水区非通航孑L桥大节段钢箱梁施工全过程控制陈钊庭，王荣辉(华南理工大学土木与交通学院，广东广州510640)．摘要：港珠澳大桥深水区非通航孔桥为ii0m跨连续梁桥，主梁为等截面钢箱梁，宽33．1m，高4．5m。该桥钢箱梁采用大节段逐跨吊装施工，为了确保最终的成桥线形满足设计要求，在大节段钢箱梁

2、制造阶段，基于梁段的真实重量准确计算了无应力制造线形，同时合理布置支墩，使大节段钢箱梁组拼时处于近似无应力状态；在吊装阶段，保持大节段钢箱梁吊装、搭接平稳，确保钢箱梁和临时牛腿结构安全；在安装阶段，考虑制造误差、体系转换及温度等因素，控制钢箱梁的梁长，合理地设置支座预偏量，并选择在温度平稳的时段内进行大节段钢箱梁的匹配。通过对大节段钢箱梁施工的全过程控制，首联钢箱梁线形实测值与理论值的误差控制在13mm之内，桥梁线形控制取得了良好的效果。关键词：跨海桥梁；连续梁桥；钢箱梁；大节段；制造；吊装；安装；施工控制中图分类

3、号：U448．215；U445．4文献标志码：AWholeProcessControlofConstructionofLargeBlockSteelBoxGirderofNon—NavigableSpanBridgeofHongKong-Zhuhai—MacaoBridgeoverDeepWaterAreaCHENZhao—ting，WANGRong。hui(SchoolofCivilEngineeringandTransportation，SouthChinaUniversityofFechnology，Guan

4、gzhou510640，China)Abstract：Thenon—navigablespanbridgeoftheHongKong—Zhuhai—MacaoBridgeoverthedeepwaterareaisa110一mspancontinuousgirderbridge．Themaingirderofthebridgeisthesteelboxgirderofconstantsectionthatis33．1mwideand4．5mdeep．Thesteelboxgirderwashois—tedandin

5、stalledspanbyspaninlargegirderblocks．Toensurethatthefinalgeometricshapesofthecompletedbridgecouldmeetthedesignrequirements，atthemanufacturingstageofthegirderblocks，theunstressedmanufacturinggeometricshapesofthesteelboxgirderwereaccuratelycal—culatedaccordingto

6、therealweightoftheblocksandmeanwhile，thesupportsfortheblockswereproperlyarrangedtokeeptheassemblingoftheblocksintheapproximateunstressedstate．Atthehoistingstage，thehoistingandconnectionoftheblockswerekeptsmoothandsteadyandthestructuralsafetyofthesteelboxgirder

7、andtemporarycorbelswasensured．Attheinstallationstage，consideringthefactorsofthemanufacturingerrors，systemtransformationandtempera—tures，thelengthofthesteelboxgirderwascontrolled，theoffsettingamountsofthebearingswereproperlysetandtheblockswerematchedattheselect

8、edtimeintervalsofsteadytempera—tures．Throughthewholeprocesscontroloftheconstructionofthelargeblocksteelboxgirder，收稿日期：2O14—10—23基金项目：国家自然科学基金资助项目(51378220)ProjectofNationalNaturalS