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大跨径预应力混凝土多孔连续刚构桥施工监控研究.docx

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大跨径预应力混凝土多孔连续刚构桥施工监控研究 Title:ResearchonConstructionMonitoringofLarge-SpanPrestressedConcretePorousContinuousRigidFrameBridges Abstract: Large-spanprestressedconcreteporouscontinuousrigidframebridgeshavebecomeincreasinglypopularduetotheirhighload-bearingcapacity,longservicelife,andaestheticappeal.However,thecomplexityoftheconstructionprocessandtheneedforhigh-qualitycontrolmakeconstructionmonitoringessential.Thispaperaimstostudytheconstructionmonitoringofsuchbridges,analyzingthechallenges,objectives,andtechniquesinvolved.Theresearchprovidesvaluableinsightsfortheefficientandreliableconstructionoflarge-spanprestressedconcretebridges. 1.Introduction 1.1Background 1.2Objectiveofthestudy 1.3Significanceofthestudy 2.Constructionprocessoflarge-spanprestressedconcretebridges 2.1Pierconstruction 2.2Substructureconstruction 2.3Superstructureconstruction 2.4Prestressingoperation 3.Challengesintheconstructionoflarge-spanprestressedconcretebridges 3.1Timelydetectionofconstructiondefects 3.2Monitoringoftemperatureandshrinkageeffects 3.3Controlofdeformationandstabilityissues 3.4Optimizationofconstructionsequence 4.Constructionmonitoringtechniques 4.1Structuralhealthmonitoring(SHM)systems 4.2Remotesensingtechniques 4.3Wirelesssensornetworks 4.4Real-timedataacquisitionandanalysis 4.5Non-destructivetesting(NDT)methods 5.Fieldstudy:Casestudyofalarge-spanprestressedconcreteporouscontinuousrigidframebridge 5.1Selectioncriteria 5.2Monitoringplan 5.3Datacollectionandanalysis 5.4Lessonslearned 6.ResultsandDiscussion 6.1Detectionofconstructiondefects 6.2Monitoringoftemperatureandshrinkageeffects 6.3Controlofdeformationandstabilityissues 6.4Optimizationofconstructionsequence 7.Conclusion 7.1Summaryoffindings 7.2Recommendationsforfutureresearch 7.3Importanceofconstructionmonitoringinlarge-spanprestressedconcretebridgeconstruction Keywords:Large-spanbridges,Prestressedconcrete,Constructionmonitoring,Structuralhealthmonitoring,Non-destructivetesting 1.Introduction Large-spanprestressedconcretepor