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1、橋梁建設(shè)2012年第42卷第1期(總第211期)96BridgeConstruction，Vo1．42，No．1，2012(TotallyNo．211)文章編號：1003-4722(2012)01—0096—06壩陵河大橋鋼桁加勁梁合龍關(guān)鍵技術(shù)龔玉華，梁森，陶路。(1．貴州高速公路開發(fā)總公司，貴州貴陽550004；2．武漢市城建安全管理站，湖北武漢430015；3．中鐵大橋局集團(tuán)武漢橋科院有限公司，湖北武漢430034)摘要：為保證壩陵河大橋鋼桁加勁梁架設(shè)的順利進(jìn)行，針對合龍過程中可能出現(xiàn)的豎向、橫向、扭轉(zhuǎn)偏差及跨中合
2、龍段合龍口長度偏小，上、下弦合龍口長度偏差不同等難點，對合龍口特征、參數(shù)敏感性、各種偏差調(diào)整措施及合龍方案進(jìn)行了研究。研究結(jié)果表明，采用在兩橋塔處對梁端進(jìn)行牽引措施可較好解決合龍口縱向長度不配匹的難點，保證鋼桁梁合龍桿件安裝順利實施；采用合龍段前端吊索暫不安裝并輔以臨時吊索的措施，可有效解決上、下弦合龍口偏差問題，同時也可作為鋼桁梁橫向、扭轉(zhuǎn)偏差的調(diào)整措施。關(guān)鍵詞：懸索橋；鋼桁梁；合龍；措施；參數(shù)中圖分類號：U448．25；U445．4文獻(xiàn)標(biāo)志碼：AKeyTechniquesforClosureofStiffening
3、SteelTrussGirderofBalingRiverBridgeG0NGYu-hua，LJANGSen，TA0Lu。(1．GuizhouExpresswayDevelopmentCorporation，Guiyang550004；China；2．AdministrationofUrbanConstructionSafety，WuhanCity，Wuhan430015，China；3．BridgeScienceResearchInstituteLtd．，ChinaRailwayMajorBridgeEngineer
4、ingGroup，Wuhan430034；China)Abstract：ToensurethattheerectionofthestiffeningsteeltrussgirderofBalingRiverBridgecouldbecarriedoutsmoothly．thecharacteristicsoftheclosuregapsofthegirder，there—latedparametersensitivity，variousadjustmentmeasuresandclosureschemeswerestu
5、diedinthelightofthevertical，lateralandtorsionaldeviationsthatwouldpossiblyoccurintheprocessoftheclosureandalsotheproblemsthatthelengthoftheclosuregapatthemidspanwasslightlyshortandthelengthdeviationsoftheclosuregapsattheupperandlowerchordsweredifferent．Theresult
6、softhestudyshowthatthemeasureofhaulingthegirderendsatthetWOtowerscanwellresolvetheproblemthatthelongitudinallengthoftheclosuregapsdoesnotmatchandcanguaranteethesmoothinstallationoftheclosuremembersofthegirder．Themeasureoftempora—rilynotinstallingthepermanentsusp
7、endersinthefrontendsoftheclosuresectionsandaidingtheclosurewiththetemporarysuspenderscaneffectivelyresolvetheproblemofthedeviationsoftheclosuregapsattheupperandlowerchordsandatthesametime，canserveforadjustmentofthelateralandtorsionaldeviationsofthegirderaswel1．K
8、eywords：suspensionbridge；steeltrussgirder；closure；measure；parameter1前言于懸索橋鋼桁加勁梁合龍段施工及相關(guān)控制經(jīng)驗較大跨度鋼桁加勁梁懸索橋多見于日本，國內(nèi)關(guān)少h。目前，國外常見懸索橋鋼桁加勁梁的合龍收稿日期：2011—09—01作者簡介：龔玉華，高級工程師，E—m
