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1、磨子潭一號(hào)大橋的施工控制研究摘要‘隨著科學(xué)技術(shù)和交通事業(yè)的發(fā)展,預(yù)應(yīng)力混凝土連續(xù)剛構(gòu)橋以其施工簡(jiǎn)便、造價(jià)經(jīng)濟(jì)、受力合理、行車(chē)舒適等獨(dú)特優(yōu)勢(shì)在近年來(lái)得到了廣泛應(yīng)用。為了保證大跨徑連續(xù)剛構(gòu)橋懸臂施工的質(zhì)量和安全,施工控制是非常重要的。本文介紹了大跨度預(yù)應(yīng)力混凝土連續(xù)梁橋發(fā)展概況,施工監(jiān)測(cè)監(jiān)控的意義、目的、作用和內(nèi)容.概述了橋梁施工控制的基本理論,及參數(shù)識(shí)別的基本原理和方法。利用橋梁結(jié)構(gòu)分析專(zhuān)業(yè)軟件MIDAS/CIVIL對(duì)具體工程項(xiàng)目——磨子潭一號(hào)大橋的上部結(jié)構(gòu)進(jìn)行計(jì)算,得到截面的應(yīng)力與位移,為橋梁施工監(jiān)測(cè)監(jiān)控提供了基本的數(shù)據(jù)依據(jù)。針對(duì)磨子
2、潭一號(hào)大橋上部結(jié)構(gòu)箱梁施工箱梁線形控制,介紹了具體的實(shí)施內(nèi)容和方法:通過(guò)理論計(jì)算、現(xiàn)場(chǎng)跟蹤測(cè)量、利用卡爾曼濾波法(KaIman)的預(yù)測(cè),給出了合理的施工預(yù)拱度值。詳細(xì)研究了磨子潭一號(hào)大橋箱梁施工過(guò)程中截面應(yīng)力測(cè)試技術(shù),并對(duì)各種測(cè)量誤差進(jìn)行了分析與處理,從而較準(zhǔn)確地掌握了結(jié)構(gòu)的實(shí)際應(yīng)力狀態(tài),有效保證了施工質(zhì)量。本文結(jié)論可為大跨徑預(yù)應(yīng)力混凝土橋梁施工監(jiān)測(cè)監(jiān)控提供有價(jià)值的參考。關(guān)鍵詞:磨子潭一號(hào)大橋施工控制預(yù)應(yīng)力混凝土預(yù)拱度現(xiàn)場(chǎng)測(cè)量應(yīng)力測(cè)試AnalysisofconstructioncontrolforMoZiTanFirstRiverBr
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6、construction.InthecoUfSeofalignmentcontroloftheboxbeamsofthesUIp盟sbl】Ictl】reofMoZiTanFirstRiverBridge,somesp葩&constructionmethodshavebeenintroduced.Throughtheoreticcalculation,fieldcontinuousmeasurementandforecastofKalmanfiltermethod,thereasonablecamberduringconstructio
7、nhasbeensuggested.Thestresstestingtechnologyofcross—sectionduringbox-beamcons訂ucdonofMoZiTanFirstRiverBridgehasbeenstudiedindetail.Meanwhile,varioustestingell'orshavebeenanalyzedandcorrected.TheactualstressesofthestructurehavebeenobtainedSOthatconstructionqualitycanbeef
8、fectivelyensured.Theconclusionsofthisthesisc孤providevaluablereferencefortheconstructionmonitoringandtestingofl