資源描述：
《東莞東江大橋鋼桁梁合龍技術(shù)》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、76橋梁建設(shè)2010年第2期文章編號(hào):1003-4722(2010)02-0076-04東莞東江大橋鋼桁梁合龍技術(shù)王紅平1,232,涂宏未,李元生(1.長(zhǎng)安大學(xué),陜西西安710064;2.東莞市新遠(yuǎn)高速公路發(fā)展有限公司,廣東東莞523120;3.中鐵九橋工程有限公司,江西九江332004)摘要:東莞東江大橋主橋?yàn)殡p層剛性懸索三桁加勁連續(xù)鋼桁梁公路橋,跨徑布置為(112+208+112)m,三桁整體受力。大橋分2次合龍(平弦合龍和加勁弦合龍),為解決合龍位置桿件偏差問(wèn)題,結(jié)合該橋的工程特點(diǎn),提出利用墩頂臨時(shí)
2、支承起頂裝置、溫差法及主墩墩頂臨時(shí)縱向頂推裝置的解決措施。采用結(jié)構(gòu)分析軟件,建立全橋有限元計(jì)算分析模型,通過(guò)對(duì)合龍工況的分析,確定了起頂位置及起頂高度,分別實(shí)現(xiàn)大橋平弦及加勁弦合龍。實(shí)踐證明,大橋順利合龍且各項(xiàng)指標(biāo)均滿足設(shè)計(jì)要求。關(guān)鍵詞:公路橋;鋼橋;桁架橋;合龍;橋梁施工中圖分類號(hào):U445;U448.36文獻(xiàn)標(biāo)志碼:AClosureTechniquesforSteelTrussGirderofDongguanDongjiangRiverBridge1,232WANGHong2ping,TUHong2w
3、ei,LIYuan2sheng(1.Chang’anUniversity,Xi′an710064,China;2.XinyuanExpresswayDevelopmentCo.,Ltd.,DongguanCity,Dongguan523120,China;3.ChinaRailwayJiujiangBridgeEngineeringCo.,Ltd.,Jiujiang332004,China)Abstract:ThemainbridgeofDongguanDongjiangRiverBridgeisadou
4、ble2deckcontinuoussteeltrussgirderhighwaybridgestiffenedbythreerigidsuspensionsteeltrussesthatcarryloadinaintegralwayandhavingspanarrangementof(112+208+112)m.TheBridgewasdesignedtobeclosedintwotimes(i.e.theclosingofthehorizontalchordsandclosingofthestiffe
5、ningchords).Toresolvetheproblemofoffsettingofthemembersattheclosuregapsandalsoincon2siderationoftheconstructioncharacteristicsoftheBridge,thesolutionstotheproblembyusingthetemporaryjack2updevicesatoppiers,thetemperaturedifferencemethodandthetemporarylongi
6、tudinalpushingdevicesatoppierswereproposedandthestructuralanalysissoftwarewasusedtoestablishthecalculationandanalysismodelsforthewholebridge.Throughtheanalysisoftheloadcasesoftheclosure,thejacking2uppositionsandheightweredeterminedandtheclos2ingofthehoriz
7、ontalchordsandstiffeningchordswerefinallyrespectivelyrealized.PracticeprovedthattheclosureoftheBridgewassmoothandvariousindicesoftheBridgecouldmeetthedesignrequirements.Keywords:highwaybridge;steelbridge;trussbridge;closure;bridgeconstruction收稿日期:2009-11-
8、13基金項(xiàng)目:廣東省交通廳科技項(xiàng)目(2007-15)作者簡(jiǎn)介:王紅平(1977-),男,高級(jí)工程師,1999年畢業(yè)于西安公路交通大學(xué)橋梁工程專業(yè),工學(xué)學(xué)士,2002年畢業(yè)于長(zhǎng)安大學(xué)橋梁與隧道工程專業(yè),工學(xué)碩士(whp22000@163.com)。?東莞東江大橋鋼桁梁合龍技術(shù)王紅平,涂宏未,李元生771工程概況東江大橋鋼桁平弦架設(shè)采用支架法和懸臂法相鋼桁梁由于鋼材強(qiáng)度高、構(gòu)件重量輕、易工廠化結(jié)合的方案。兩邊跨采用支架法拼裝,利用
