武汉青山长江公路大桥主桥边跨结合梁施工技术
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摘要
武汉青山长江公路大桥主桥为主跨938m的双塔双索面全飘浮体系斜拉桥,单侧边跨结合梁长368m,由钢槽梁与预制混凝土桥面板通过湿接缝及剪力钉结合而成。其中,钢槽梁宽48m,桥中线处梁高4.06m;预制混凝土桥面板最大单块尺寸10.135m×3.2m×0.37m,重34.2t。边跨结合梁施工采用先顶推架设钢槽梁,再安装预制混凝土桥面板,最后浇筑湿接缝的整体施工方案。钢槽梁节段由浮吊吊装至主墩墩旁托架平台,依次拼装焊接3个节段后由主墩托架平台往边跨方向顶推架设;混凝土桥面板采用工厂化预制,采用50t全回转架板吊机由主墩往边墩方向逐块吊装;桥面板架设后,浇筑湿接缝混凝土,完成结合梁结合施工。施工过程中采取了临时支点同步下落、墩顶钢梁横向压载、辅助墩支点顶落梁等质量控制措施。
The main bridge of Qingshan Changjiang River Bridge in Wuhan is a full floating system cable-stayed bridge with a main span of 938 m,consisting of double pylons and double cable planes.The length of unilateral side span composite girder is 368 m,and the girder is comprised of steel groove girders and precast concrete bridge deck slabs by shear studs and wet-joints.The width of the steel groove girder is 48 mand the height of the steel groove girder at bridge centerline is 4.06 m.The maximum size of precast concrete bridge deck slabs are 10.135 m×3.2 m×0.37 mand the weight is 34.2 t.The construction scheme of the side span composite girder is as follows:the steel groove girders are erected using incremental launching method firstly,then the precast concrete bridge deck slabs are installed,finally the wet-joints will be poured.The steel groove girder segments are lifted to the pier-side brackets of main pier by floating crane,thereafter,the 3 segments being successively assembled and welded are erected by pushing from the pierside brackets of main pier to side span.The concrete bridge deck slabs were prefabricated in factory,and erected from the main pier to side pier gradually by a 50 tfull slewing crane.After the concrete bridge deck slabs are installed,fresh concrete is poured in wet-joint to complete the construction of composite girder.Construction quality control measures,including sinking the temporary fulcrum synchronously,lateral loading on the steel girder at the piers,jacking-up and fallingoff the girders at the auxiliary piers,are taken in the construction procedure.
The main bridge of Qingshan Changjiang River Bridge in Wuhan is a full floating system cable-stayed bridge with a main span of 938 m,consisting of double pylons and double cable planes.The length of unilateral side span composite girder is 368 m,and the girder is comprised of steel groove girders and precast concrete bridge deck slabs by shear studs and wet-joints.The width of the steel groove girder is 48 mand the height of the steel groove girder at bridge centerline is 4.06 m.The maximum size of precast concrete bridge deck slabs are 10.135 m×3.2 m×0.37 mand the weight is 34.2 t.The construction scheme of the side span composite girder is as follows:the steel groove girders are erected using incremental launching method firstly,then the precast concrete bridge deck slabs are installed,finally the wet-joints will be poured.The steel groove girder segments are lifted to the pier-side brackets of main pier by floating crane,thereafter,the 3 segments being successively assembled and welded are erected by pushing from the pierside brackets of main pier to side span.The concrete bridge deck slabs were prefabricated in factory,and erected from the main pier to side pier gradually by a 50 tfull slewing crane.After the concrete bridge deck slabs are installed,fresh concrete is poured in wet-joint to complete the construction of composite girder.Construction quality control measures,including sinking the temporary fulcrum synchronously,lateral loading on the steel girder at the piers,jacking-up and fallingoff the girders at the auxiliary piers,are taken in the construction procedure.
引文
[1]邵长宇,陈亮,汤虎.大跨径组合梁斜拉桥试设计及力学性能研究[J].桥梁建设,2017,47(4):101-106.(SHAO Chang-yu,CHEN Liang,TANG Hu.Study of Trial Design and Mechanical Performance of Long Span Composite Girder Cable-Stayed Bridges[J].Bridge Construction,2017,47(4):101-106.in Chinese)
[2]胡辉跃,徐恭义,张燕飞.武汉青山长江公路大桥主桥主梁设计关键技术[J].桥梁建设,2018,48(5):81-85.(HU Hui-yue,XU Gong-yi,ZHANG Yan-fei.Key Techniques for Design of Main Girder of Main Bridge of Wuhan Qingshan Changjiang River Highway Bridge[J].Bridge Construction,2018,48(5):81-85.in Chinese)
[3]胡辉跃,刘俊峰,宁伯伟.三门峡黄河公铁两用大桥主桥钢桁结合梁设计[J].桥梁建设,2018,48(2):83-88.(HU Hui-yue,LIU Jun-feng,NING Bo-wei.Design of Steel Truss Composite Girder of Main Bridge of Sanmenxia Huanghe River Rail-cum-Road Bridge[J].Bridge Construction,2018,48(2):83-88.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]方继,丁仕洪,张时利,等.济南黄河公铁两用桥带加劲弦顶推施工技术[J].桥梁建设,2016,46(6):112-117.(FANG Ji,DING Shi-hong,ZHANG Shi-li,et al.Consruction Techniques for Incremental Launching of Ji′nan Huanghe River Rali-cum-Road Bridge with Stiffening Chords[J].Brigde Construction,2016,46(6):112-117.in Chinese)
[6]陶建山.港珠澳大桥集束式剪力钉-钢混组合连续施工技术[J].桥梁建设,2014,44(6):1-6.(TAO Jian-shan.Construction Techniques for SteelConcrete Continuous Composite Girder of Hong KongZhuhai-Macao Bridge Using Clustered Shear Studs[J].Bridge Construction,2014,44(6):1-6.in Chinese)
[7]潘军,徐瑜.港珠澳大桥九洲航道桥主梁及桥塔施工关键技术[J].桥梁建设,2016,46(6):1-6.(PAN Jun,XU Yu.Key Techniques for Construction of Main Girder and Pylons of Jiuzhou Ship Channel Bridge of Hong Kong-Zhuhai-Macao Bridge[J].Bridge Construction,2016,46(6):1-6.in Chinese)
[8]潘军.港珠澳大桥非通航孔85m连续组合梁桥施工关键技术[J].世界桥梁,2016,44(1):20-24.(PAN Jun.Key Construction Techniques for 85 m Non-Navigational Channel Contious Composite Girder Bridge of Hong Kong-Zhuhai-Macao Bridge[J].World Brigdes,2016,44(1):20-24.in Chinese)
[9]李小珍,王聪,肖林,等.斜拉桥钢-混凝土结合梁的受力性能试验研究[J].工程力学,2015,32(9):191-198.(LI Xiao-zhen,WANG Cong,XIAO Lin,et al.Test Study for Mechanical Behavior of Steel-Concrete Composite Girder of Cable-Stayed Bridge[J].Engineering Mechanics,2015,32(9):191-198.in Chinese)
[10]王天禹.大跨度钢-混组合梁桥施工监控方法及问题分析(硕士学位论文)[D].重庆:重庆交通大学,2015.(WANG Tian-yu.Construction Monitoring and Problem Analysis of Long Span Steel and Concrete Composite Girder Bridge(Master Dissertation)[D].Chongqing:Chongqing Jiaotong University,2015.in Chinese)
[2]胡辉跃,徐恭义,张燕飞.武汉青山长江公路大桥主桥主梁设计关键技术[J].桥梁建设,2018,48(5):81-85.(HU Hui-yue,XU Gong-yi,ZHANG Yan-fei.Key Techniques for Design of Main Girder of Main Bridge of Wuhan Qingshan Changjiang River Highway Bridge[J].Bridge Construction,2018,48(5):81-85.in Chinese)
[3]胡辉跃,刘俊峰,宁伯伟.三门峡黄河公铁两用大桥主桥钢桁结合梁设计[J].桥梁建设,2018,48(2):83-88.(HU Hui-yue,LIU Jun-feng,NING Bo-wei.Design of Steel Truss Composite Girder of Main Bridge of Sanmenxia Huanghe River Rail-cum-Road Bridge[J].Bridge Construction,2018,48(2):83-88.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]方继,丁仕洪,张时利,等.济南黄河公铁两用桥带加劲弦顶推施工技术[J].桥梁建设,2016,46(6):112-117.(FANG Ji,DING Shi-hong,ZHANG Shi-li,et al.Consruction Techniques for Incremental Launching of Ji′nan Huanghe River Rali-cum-Road Bridge with Stiffening Chords[J].Brigde Construction,2016,46(6):112-117.in Chinese)
[6]陶建山.港珠澳大桥集束式剪力钉-钢混组合连续施工技术[J].桥梁建设,2014,44(6):1-6.(TAO Jian-shan.Construction Techniques for SteelConcrete Continuous Composite Girder of Hong KongZhuhai-Macao Bridge Using Clustered Shear Studs[J].Bridge Construction,2014,44(6):1-6.in Chinese)
[7]潘军,徐瑜.港珠澳大桥九洲航道桥主梁及桥塔施工关键技术[J].桥梁建设,2016,46(6):1-6.(PAN Jun,XU Yu.Key Techniques for Construction of Main Girder and Pylons of Jiuzhou Ship Channel Bridge of Hong Kong-Zhuhai-Macao Bridge[J].Bridge Construction,2016,46(6):1-6.in Chinese)
[8]潘军.港珠澳大桥非通航孔85m连续组合梁桥施工关键技术[J].世界桥梁,2016,44(1):20-24.(PAN Jun.Key Construction Techniques for 85 m Non-Navigational Channel Contious Composite Girder Bridge of Hong Kong-Zhuhai-Macao Bridge[J].World Brigdes,2016,44(1):20-24.in Chinese)
[9]李小珍,王聪,肖林,等.斜拉桥钢-混凝土结合梁的受力性能试验研究[J].工程力学,2015,32(9):191-198.(LI Xiao-zhen,WANG Cong,XIAO Lin,et al.Test Study for Mechanical Behavior of Steel-Concrete Composite Girder of Cable-Stayed Bridge[J].Engineering Mechanics,2015,32(9):191-198.in Chinese)
[10]王天禹.大跨度钢-混组合梁桥施工监控方法及问题分析(硕士学位论文)[D].重庆:重庆交通大学,2015.(WANG Tian-yu.Construction Monitoring and Problem Analysis of Long Span Steel and Concrete Composite Girder Bridge(Master Dissertation)[D].Chongqing:Chongqing Jiaotong University,2015.in Chinese)