doi:10.3963/j.issn.1674-6066.2023.01.021独塔双索面预应力混凝土斜拉桥施工监控龚红星(武汉大通工程建设有限公司,武汉430050)摘要:某独塔双索面预应力混凝土斜拉桥为跨径组合2×120m、预应力混凝土双边箱主梁、H形主塔结构,采用节段悬臂现浇和部分支架现浇相结合的施工方法。为确保成桥后主梁线形与结构内力满足设计要求并保证施工安全,采用Midas/Civil软件建立有限元模型进行正装计算分析,按照“线形控制为主、索力控制为辅”的控制原则进行桥梁施工监控。结果表明:成桥线形整体上接近理论线形,误差控制在24mm以内,成桥索力误差控制在5%以内,结构线形、索力监控均满足设计预期。关键词:斜拉桥;施工监控;桥塔偏位;索力监控;应力监控ConstructionMonitoringofPrestressedConcreteCable-stayedBridgewithSingleTowerandDoubleCablePlanesGONGHong-xing(WuhanDatongEngineeringConstructionCo,Ltd,Wuhan430050,China)Abstract:Combinedconstructionofsegmentalcantilevercast-in-situandpartialsupportcast-in-situwasusedinaprestressedconcretecable-stayedbridgewithsingletower,doublecableplanesandaspancombinationof2×120m.ThebridgewascomposedofdoublesideboxgirderandH-shapedtower.Inordertoensurethealignmentofthemainbeamandtheinternalforceofthestructuremeetthedesignrequirementsandensuretheconstructionsafety.Midas/Civilsoftwarewasusedtoestablishafiniteelementmodelforregular-orderinstallationcalculation.Andanalysisandthebridgeconstructionmonitoringwascarriedoutaccordingtothecontrolprinciplethatthealignmentisthekeycontrolfocusalongwithcableforcesmonitoring.Theconstructionmonitoringresultsshowedthatthealignmentmeetstheexpectedtargetrequirements,theerroriscontrolledwithin24mm,theerrorofthecableforceiscontrolledwithin5%,thestructuralalignmentandcableforcemonitoringmeetthedesignexpectations.Keywords:cable-stayedbridge;constructionmonitoring;bridgetowerdeviation;cableforcemonitoring;stressmonitoring收稿日期:2022-09-15.作者简介:龚红星(1968-),本科.E-mail:308324842@qq.com1工程概况某独塔双索面预应力混凝土主梁斜拉桥跨径组合为2×120m。主梁标准梁段采用预应力混凝土双边箱断面结构,主梁中心梁高2.8m,全宽34.8m。箱梁宽7.45m,顶板厚0.3m,直腹板厚0.4m,斜腹板厚0.35m,底...
