转体施工开口薄壁拱肋后期混凝土连续浇筑可行性分析

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1、ABSTRACTswivelerectionofopenthin-walledarchbridgeisanewprocesswhichcanbeusedforgirdersarchbridge．Thefeaturesithavearethatcanhelpreducegrossweightandcosts，andconvenientforconstruction．but，inordertoreducetheweightofswingsystem，wallthicknessoftheopenarchribshouldbethinn

2、er，whichleadtocarryingcapacityofopenthin．walledarchbridgeislimitedafterclosure．Whensecond-phaseconcreteisplacedtothickenventralshieldandmotherboard，archribisusuallydividedintomanysections，andtobeplacedinanorder．Untiltheintensityofconcreterunupto80％cantocarryofnextste

3、p．Sodurationneedslonger．Besides，itisfarawayfromadjacentsection，equipmentsmustmovecross，whichisinconvenientforconstruction．Accedingtoissues，throughtheengineeringofGuiZhouHuajiangbridge，makingresearchonthickeningventralshieldandmotherboardbyplacesecond—phaseconcretetoa

4、chievethetechnologywhichplaceconcretefromarchspringingtovaultsymmetrically．alsomakingresearchontheinfluenceoftemperatureandstabilityofopenthin-walledarchribduringtheconstruction．Rotationalstructureadaptingtocontinuouscastingtechnologyhasbeenputwhichcombiningtheresult

5、s，anditdoesn’tneedtoaddinclinedtensionedcablewhenthesecond-stageconcretehasbeencontinuouslypoured．Thestabilityoftheexistingandthenewstructurehasbeencompared，whichprovidesthereferenceforthedesignand’constructionofthebridge．KeyWords：openthin-walledarchbridge；continuous

6、construction；srotationconstruction：thecoefficientofstability；temperatureaffects；contractionⅡ目录摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．IABsl限ACT⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯II第一章绪论1．1引言⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．11．2桥梁转体施工概述⋯⋯⋯⋯⋯⋯⋯⋯

7、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一l1．3国内外转体施工的发展现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．31．4砼开口薄壁截面拱桥施工工艺特点及发展现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一51．5拱肋连续浇筑技术概述⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一51．6本文要做的工作⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯6第二章拱肋混凝土连续浇筑技术综述2．1引言⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．72．2斜拉扣索的设置方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

8、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．72．2．1斜拉扣索的构成⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．72．2．2斜拉索设置的原理和索力的计算⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯82．2．3影响矩阵法设置斜拉索和计算索力⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯