蒙华铁路洞庭湖特大桥主桥钢梁架设关键技术
|
摘要
蒙华铁路洞庭湖特大桥主桥为主跨406m的三塔斜拉桥,主梁采用钢箱-钢桁组合结构。其中,下部钢箱梁宽21m,中心处梁高2.5m;上部钢桁梁采用华伦式布置,节间长14m,桁高12m。该桥主梁采用"先箱后桁"的方案施工,先安装下部钢箱梁,钢箱梁合龙后,在其顶面分组安装钢桁梁。边跨钢箱梁采用顶推法架设;主跨钢箱梁采用悬臂拼装法架设,钢箱梁节段利用300t架梁吊机整体吊装,在主跨跨中采用主动合龙方式合龙。上部钢桁梁杆件采用上弦杆制造长度修正、分组架设(5个节间为1组)、多个调整口合龙等技术施工,完成钢桁梁杆件拼装,并实现精确合龙。
The main bridge of the Dongting Lake Bridge on Mengxi-Huazhong Railway is a three-pylon cable-stayed bridge with the main span of 406 m,and the steel box-steel truss composite structure is adopted for the main girder.The width of the lower steel box girder is 21 mand the height of the steel box girder at bridge centerline is 2.5 m;the upper steel truss girders are arranged in the Warren style,in which the length of inter node is 14 m,and the height of truss is 12 m.The construction method of " firstly erecting steel box girder and then steel truss girder" is used in the erection of main bridge.The lower steel box girders are erected firstly,then the steel truss girders are erected on the top of steel box girders after the closure of steel box girders.The method of incremental launching is used for the steel box girder of the side span.The steel box girders of the main span,which are integrally hoisted by the 300 tgirder crane,are constructed by the cantilever installation method.The main span is closed by active closure measures.Construction measures,including length correction of upper chord manufacturing,erection of steel truss girder in groups(5 panels for 1 group),and closure of multiple adjusting joints,are taken for the upper steel truss girders to complete the erection of the steel truss girders,then the objective of closure in high-precision is achieved.
The main bridge of the Dongting Lake Bridge on Mengxi-Huazhong Railway is a three-pylon cable-stayed bridge with the main span of 406 m,and the steel box-steel truss composite structure is adopted for the main girder.The width of the lower steel box girder is 21 mand the height of the steel box girder at bridge centerline is 2.5 m;the upper steel truss girders are arranged in the Warren style,in which the length of inter node is 14 m,and the height of truss is 12 m.The construction method of " firstly erecting steel box girder and then steel truss girder" is used in the erection of main bridge.The lower steel box girders are erected firstly,then the steel truss girders are erected on the top of steel box girders after the closure of steel box girders.The method of incremental launching is used for the steel box girder of the side span.The steel box girders of the main span,which are integrally hoisted by the 300 tgirder crane,are constructed by the cantilever installation method.The main span is closed by active closure measures.Construction measures,including length correction of upper chord manufacturing,erection of steel truss girder in groups(5 panels for 1 group),and closure of multiple adjusting joints,are taken for the upper steel truss girders to complete the erection of the steel truss girders,then the objective of closure in high-precision is achieved.
引文
[1]易伦雄.洞庭湖主跨406m三塔铁路斜拉桥设计关键技术[J].桥梁建设,2018,48(5):86-90.(YI Lun-xiong.Key Techniques for Design of Dongting Lake Three-Pylon Railway Cable-Stayed Bridge with Main Span of 406m[J].Brigde Construction,2018,48(5):86-90.in Chinese)
[2]王东辉.铜陵公铁两用长江大桥南岸边跨钢梁施工技术[J].世界桥梁,2015,43(6):1-5.(WANG Dong-hui.Consruction Techniques for South Side Span Steel Girders of Tongling Rail-cum-Road Changjiang River Bridge[J].World Brigdes,2015,43(6):1-5.in Chinese)
[3]李钊.六广河特大桥边跨顶推施工技术[J].世界桥梁,2017,45(5):11-16.(LI Zhao.Incremental Launching Construction Technique for Side Spans of Liuguanghe River Bridge[J].World Brigdes,2017,45(5):11-16.in Chinese)
[4]金红岩,胡军.青山长江公路大桥边跨钢槽梁顶推关键技术[J].世界桥梁,2018,46(2):15-19.(JIN Hong-yan,HU Jun.Key Incremental Launching Techniques for Side-Span Steel Trough Girder of Qingshan Changjiang River Highway Bridge[J].World Brigdes,2018,46(2):15-19.in Chinese)
[5]胡海波.武汉二七长江大桥主桥结合梁施工技术[J].桥梁建设,2012,42(3):1-6.(HU Hai-bo.Construction Techniques for Composite Girder of Main Bridge of Wuhan Erqi Changjiang River Bridge[J].Brigde Construction,2012,42(3):1-6.in Chinese)
[6]周外男.铜陵公铁两用长江大桥主桥施工关键技术[J].桥梁建设,2014,44(4):1-8.(ZHOU Wai-nan.Key Techniques for Construction of Main Bridge of Tongling Changjiang River Rail-cumRoad Bridge[J].Brigde Construction,2014,44(4):1-8.in Chinese)
[7]但启联,尹子安,向琪芪,等.钢桁梁斜拉桥双斜杆合龙段合龙技术研究[J].铁道建筑,2017,57(10):26-30.(DAN Qi-lian,YIN Zi-an,XIANG Qi-qi,et al.Study on Closure Technology of Doubie Diagonal Bar Closure Section of Steel Truss Girder Cable-Stayed Bridge[J].Railway Engineering,2017,57(10):26-30.in Chinese)
[8]沈大才,马晓东.平潭海峡公铁两用大桥钢梁架设关键技术[J].桥梁建设,2018,48(4):6-11.(SHEN Da-cai,MA Xiao-dong.Key Techniques for Erection of Steel Girders of Pingtan Straits Rail-cumRoad Bridge[J].Brigde Construction,2018,48(4):6-11.in Chinese)
[9]易伦雄.铁路斜拉桥板-桁组合结构主梁及其施工方法[J].钢结构,2016,31(1):86-88.(YI Lun-xiong.Plate-Truss Composite Structure of Railway Cable-Stayed Bridge and Its Construction Method[J].Steel Construction,2016,31(1):86-88.in Chinese)
[10]胡汉舟,文武松,秦顺全,等.京沪高速铁路南京大胜关长江大桥技术总结[M].北京:中国铁道出版社,2011.(HU Han-zhou,WEN Wu-song,QIN Shun-quan,et al.Technical Summary of Nanjing Dashengguan Changjiang River Bridge on Beijing-Shanghai HighSpeed Railway[M].Beijing:China Railway Publishing House,2011.in Chinese)
[2]王东辉.铜陵公铁两用长江大桥南岸边跨钢梁施工技术[J].世界桥梁,2015,43(6):1-5.(WANG Dong-hui.Consruction Techniques for South Side Span Steel Girders of Tongling Rail-cum-Road Changjiang River Bridge[J].World Brigdes,2015,43(6):1-5.in Chinese)
[3]李钊.六广河特大桥边跨顶推施工技术[J].世界桥梁,2017,45(5):11-16.(LI Zhao.Incremental Launching Construction Technique for Side Spans of Liuguanghe River Bridge[J].World Brigdes,2017,45(5):11-16.in Chinese)
[4]金红岩,胡军.青山长江公路大桥边跨钢槽梁顶推关键技术[J].世界桥梁,2018,46(2):15-19.(JIN Hong-yan,HU Jun.Key Incremental Launching Techniques for Side-Span Steel Trough Girder of Qingshan Changjiang River Highway Bridge[J].World Brigdes,2018,46(2):15-19.in Chinese)
[5]胡海波.武汉二七长江大桥主桥结合梁施工技术[J].桥梁建设,2012,42(3):1-6.(HU Hai-bo.Construction Techniques for Composite Girder of Main Bridge of Wuhan Erqi Changjiang River Bridge[J].Brigde Construction,2012,42(3):1-6.in Chinese)
[6]周外男.铜陵公铁两用长江大桥主桥施工关键技术[J].桥梁建设,2014,44(4):1-8.(ZHOU Wai-nan.Key Techniques for Construction of Main Bridge of Tongling Changjiang River Rail-cumRoad Bridge[J].Brigde Construction,2014,44(4):1-8.in Chinese)
[7]但启联,尹子安,向琪芪,等.钢桁梁斜拉桥双斜杆合龙段合龙技术研究[J].铁道建筑,2017,57(10):26-30.(DAN Qi-lian,YIN Zi-an,XIANG Qi-qi,et al.Study on Closure Technology of Doubie Diagonal Bar Closure Section of Steel Truss Girder Cable-Stayed Bridge[J].Railway Engineering,2017,57(10):26-30.in Chinese)
[8]沈大才,马晓东.平潭海峡公铁两用大桥钢梁架设关键技术[J].桥梁建设,2018,48(4):6-11.(SHEN Da-cai,MA Xiao-dong.Key Techniques for Erection of Steel Girders of Pingtan Straits Rail-cumRoad Bridge[J].Brigde Construction,2018,48(4):6-11.in Chinese)
[9]易伦雄.铁路斜拉桥板-桁组合结构主梁及其施工方法[J].钢结构,2016,31(1):86-88.(YI Lun-xiong.Plate-Truss Composite Structure of Railway Cable-Stayed Bridge and Its Construction Method[J].Steel Construction,2016,31(1):86-88.in Chinese)
[10]胡汉舟,文武松,秦顺全,等.京沪高速铁路南京大胜关长江大桥技术总结[M].北京:中国铁道出版社,2011.(HU Han-zhou,WEN Wu-song,QIN Shun-quan,et al.Technical Summary of Nanjing Dashengguan Changjiang River Bridge on Beijing-Shanghai HighSpeed Railway[M].Beijing:China Railway Publishing House,2011.in Chinese)