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1、橋梁建設(shè)2013年第43卷第1期(總第218期)BridgeConstruction，Vo1．43，No．1，2013(TotallyNo．218)99文章編號(hào)：1003—4722(2013)01—0099—05天津團(tuán)泊新橋施工控制閆燕紅，孫運(yùn)國(guó)，何立忠(天津市市政工程研究院，天津300074)摘要：為了使團(tuán)泊新橋(獨(dú)柱斜塔空間扭面背索混合梁斜拉橋)的成橋線形和索力、應(yīng)力均達(dá)到設(shè)計(jì)及規(guī)范要求，根據(jù)該橋結(jié)構(gòu)特點(diǎn)及主要施工過程，確定該橋施工控制以橋塔線形控制為主，索力的確定采用基于正裝法及最小二乘法原理的優(yōu)化方法，該橋斜拉索控制張拉索力的確定分橋塔懸臂施工和體系轉(zhuǎn)換施工2
2、個(gè)階段進(jìn)行。通過參數(shù)識(shí)別確定將背索和前索索力作為重點(diǎn)識(shí)別的結(jié)構(gòu)參數(shù)。橋塔目標(biāo)線形控制主要通過對(duì)塔柱拼裝線形控制與索力調(diào)整控制來實(shí)現(xiàn)。塔柱施工過程中需采用合理的索力張拉順序保證橋塔施工中及成橋狀態(tài)的內(nèi)力安全，橋塔線形控制包括塔柱拼裝線形與塔柱整體姿態(tài)2部分。團(tuán)泊新橋成橋后各控制參數(shù)滿足設(shè)計(jì)要求。關(guān)鍵詞：斜拉橋；橋塔；斜拉索；索力；參數(shù)識(shí)別；線形；施工控制中圖分類號(hào)：U448．27文獻(xiàn)標(biāo)志碼：AConstructionControlofNewTuanboBridgeinTianjinYANYan—hong，SUNYun—guo，HELi—zhong(TianjinMuni
3、cipalEngineeringResearchInstitute，Tianjin300074，China)Abstract：Toensurethatthegeometricshapes，cableforcesandstressofthecompletedbridgeoftheNewTuanboBridge(ahybridgirdercable—stayedbridgewithasingleinclinedcol—umnpylonandspatialtwistedbackstays)inTianjincouldmeettherelevantrequirementsin
4、thedesignandcodesandinthelightofthestructuralcharacteristicsandthemajorconstructionprocessofthebridge，itwasdeterminedthatthegeometricshapesofthepylonofthebridgeweretobemainlycontrolledintheconstruction．Thecableforcesofthestaycablesweretobedeter—mined，usingtheoptimizationmethodbasedonthe
5、forwardassemblingcalculationmethodandtheprinciplesoftheleastsquaremethod．ThetensionedcableforcesweretobecontrolledintwOstagesofthecantileverconstructionandsystemtransformationofthepylon．Thecableforcesofthebackstaysandfrontstaysweretoberegardedasthecriticalstructuralparameterstobepar—tic
6、ularlyidentifiedintheparameteridentification．Thecontrolofthetargetgeometricshapesofthepylonwastoberealizedthroughthecontroloftheassemblinggeometricshapesofthepyloncolumnandthecableforceadjustment．Intheconstructionprocessofthepylon，therationalten—sioningsequencesofthestaycableswerenecess
7、arilytobeadoptedSOastoensurethesafetyoftheinternalforcesofthepyloninboththeconstructionandcompletedbridgestate．Theeontrolofthegeometricshapesofthepylonincludedtwopartsoftheassemblinggeometricshapesandtheglobalpostureofthepyloncolumn．Aftertheconstructionofthebridgewasfinallycomp
