主讲曾绍武陕西铁路工程第讲支架现浇课件讲解.ppt

LOGO主讲：曾绍武

陕西铁路工程职业技术学院Lesson24Constructionwithcast-in-placesupportmethodSpeaker:ZengShaowuShaanxiRailwayEngineeringVocationalandTechnicalCollege任务导入通过对现浇支架施工的学习，掌握现浇预应力混凝土梁的支架法施工工艺及注意事项．Bystudyingtheconstructionofcast-in-placebrackets,mastertheconstructionprocessandprecautionsofthebracketmethodforcast-in-placeprestressedconcretebeamsTaskImport能力目标能够掌握支架类型适用条件目标１目标２能够掌握支架施工工艺目标３能够了解支架监控要点支架现浇法施工CapabilityobjectivesAbletograsptheapplicableconditionsofbrackettypesAbletomastertheconstructionprocessofbracketsAbletounderstandthekeypointsofbracketmonitoringSupportcast-in-placeconstructionmethod任务1.支架现浇法适用条件任务2.支架的类型及适用条件任务3.支架法施工工艺及实施方案本节任务资讯Task1.Applicableconditionsforcast-in-placesupportmethodTask2.TypesandApplicableConditionsofSupportsTask3.Constructionprocessandimplementationplanofsupportmethod就地浇注施工是必须有的，在偏僻山区，大型吊装设备不能就住的地方。变宽度桥、弯桥等复杂结构桥梁城市弯曲曲桥等不能用装配法施工的，则采用支架现浇方法。非标准跨径采用装配法成本较高。Cast-in-placeconstructionisnecessary,asinremotemountainousareas,largeliftingequipmentcannotbeeasilyaccommodated.Forcomplexstructuralbridgessuchasvariablewidthbridgesandcurvedbridgesthatcannotbeconstructedusingassemblymethodsinurbancurvedbridges,thebracketcast-in-placemethodisused.Thecostofusingassemblymethodfornon-standardspansisrelativelyhigh.任务1.支架现浇法适用条件Task1.Applicableconditionsforcast-in-placesupportmethod就地浇筑混凝土梁桥的上部结构，首先应在桥孔位置搭设支架，以支承模板、浇筑的钢筋混凝土以及其他施工荷载的重力。Theupperstructureofcast-in-placeconcretebeambridgesshouldfirstbesupportedbybracketsatthebridgeopeningtosupportthegravityoftheformwork,pouredreinforcedconcrete,andotherconstructionloads.支架support按其构造分Dividedbyitsstructure立柱式梁式梁式－立柱式按其材料分木支架钢支架钢木支架万能杆件组拼支架（备注：还应进行强度和稳定性验算）任务2.支架的类型及适用条件SPARTask2.TypesandApplicableConditionsofSupportsBeamtypeBeamcolumntypeAccordingtoitsmate