1月10日14时40分，随着最后两个块段混凝土浇筑完成，由中铁大桥局承建的崇启公铁长江大桥南引桥跨南汊河连续梁施工顺利收官。 崇启公铁长江大桥建成后，在上海大都市圈、南京都市圈和合肥都市圈间建起一条快速新通道，对于优化沿长江地区铁路网布局、服务长江经济带协同发 展，推动长三角高质量一体化发展等具有重要意义。 通讯员徐帆王世琪孟庆虎 崇启公铁长江大桥南引桥位于江苏省启东市启隆镇境内，分别有跨长岛大道和跨南汊河两个连续梁。上层是高速公路，下层为高铁线、城际线，其中高铁 线、城际线长均为830.05米，各五个桥墩、两套挂篮施工。此前跨南汊河城际线已浇筑完成，此次浇筑的是跨南汊河最后两个块段—高铁线S24-S28#墩 2*64m T构连续梁。 崇启公铁长江大桥跨南汊河处为2-(2-64)mT构连续梁，单个T构，总共分为0-12#块段，城际侧连续梁长度共256m，12#节段为直线段，直线段梁高4m，顶 板底板厚度均为0.4m。T构梁截面翼缘宽12.6m，混凝土方量102.22m，标号C50。 扬子晚报/紫牛新闻记者笪越 校对胡妍璐 ...

崇启公铁长江大桥跨南汊河处为2-(2-64)mT构连续梁，单个T构，总共分为0-12#块段，城际侧连续梁长度共256m，12#节段为直线段，直线段梁高4m，顶 板底板厚度均为0.4m。T构梁截面翼缘宽12.6m，混凝土方量102.22m，标号C50。 崇启公铁长江大桥建成后，在上海大都市圈、南京都市圈和合肥都市圈间建起一条快速新通道，对于优化沿长江地区铁路网布局、服务长江经济带协同发 展，推动长三角高质量一体化发展等具有重要意义。 通讯员崔永兴王世琪孟庆虎 扬子晚报/紫牛新闻记者笪越 12月19日17时40分，由中铁大桥局承建的北沿江高铁崇启公铁长江大桥南引桥城际铁路最后一个块段混凝土浇筑完成。 崇启公铁长江大桥南引桥位于江苏省启东市启隆镇境内，分别有跨长岛大道和跨南汊河两个连续梁。上层是高速公路，下层为高铁线、城际线，其中高铁 线、城际线长均为830.05米，各有S24-S28#墩五个桥墩，各设两套挂篮施工，此次浇筑的是城际线SC27墩大里程侧12号块。 ol t age 100 年 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Ama EXTE An f ...

崇启公铁长江大桥北引桥采用公铁合建方案，全长1069.27米。上层为双向6车道的1级公路，下层为双线高铁+双线城际。其中主桥6号-NC21号墩城际侧 采用移动模架施工，主桥6号—N12号墩、N16-N18号墩铁路侧采用现浇支架；N13-N16,N18-N27号墩铁路侧为预制架设。本次浇筑的为崇启公铁长江大桥 城际侧NC20-NC21号墩梁，长40.6米，宽12.2米，浇筑混凝土总量344方，采用移动模架法现浇施工。 12月15日17:58，经过10个小时的连续作业，由中铁大桥局承建的崇启公铁长江大桥北引桥城际侧最后一孔移动模架现浇梁顺利浇筑完成，标志着大桥下 层铁路梁现浇施工任务圆满收官，为后续全面转入上层公路梁施工奠定坚实基础。 据中铁大桥局沪渝蓉高铁V标项目部北岸工区负责人范志晶介绍：通过使用可移动的模板系统，在桥梁的墩台之间逐段浇筑混凝土梁体，实现连续循环作 业，显著缩短施工周期，减少对周围环境的影响，且不受地形限制。 冬季来临，为充分做好城际侧最后一孔移动模架现浇梁的准备工作，项目部避开零度以下低温时段，提前召开专项交底会，优化完善现浇施工方案，组织 技术人员全程量测砼温度，确保砼施工质量满足规范要求 ...

2025年12月8日，北沿江高铁崇启公铁长江大桥非通航孔钢梁顶推最后7米圆满完成，并与日前顶推到位的主通航孔南边跨钢梁在主桥1号墩"胜利会师"， 它标志着我国长江上最长、最重的钢梁顶推施工工艺创造了一项新的纪录,也为我国同类型桥梁施工技术提供了成功经验。 崇启公铁长江大桥地处长江入海口，受河床地质条件和水文潮汐等因素的影响，大桥南侧江中的非通航孔桥11孔钢梁架设采用了杆件散拼、吊装、顶推施 工工艺，非通航孔桥钢梁总长1205.4米，钢梁总重3.89万吨，分86个节间，进行13轮(次)顶推。主通航孔992米，以3、4号墩为中心，各有两个边跨，架设 钢梁采用整节段吊装、焊接、顶推施工工艺，北边跨14个节段，顶推后与北引桥接壤；南边跨15个节段，顶推后与非通航孔钢梁接壤，此次是全桥最后一 次顶推，长度7米。后续将进入中跨3、4号墩钢梁吊装施工，一边6吊，与斜拉索安装和桥面板铺设同步进行，预计明年五一前跨中合龙。 崇启公铁长江大桥是沪渝蓉高铁控制性工程，采用无砟轨道设计，精度控制要求非常高，钢梁拼装线型控制相当严格，顶推设备数量多、同步控制难度 大。项目团队应用自主研发的多点自适应同步顶推控制系统，不断探索实践，通过 ...

Core Points - The installation of the south span steel beams for the Chongqi Railway and Highway Yangtze River Bridge has been successfully completed, marking a significant milestone in the construction process [1] - The main navigation hole steel truss of the bridge measures 992 meters in total length, with a main span of 400 meters and consists of 6 piers [3] - The bridge is a key control project for the Shanghai-Nanjing-Hefei high-speed railway, featuring a dual-layer design for both road and rail use [8] Summary by Sections - **Construction Progress** - The last steel beam for the south span, weighing 933.71 tons, has been installed, and the next steps include the installation of support structures and bridge deck panels [6] - The south span pushing operation is expected to be completed by late November, with the main navigation hole piers anticipated to be connected by May next year [6] - **Bridge Specifications** - The bridge spans a total length of 4.09 kilometers and crosses the northern channel of the Yangtze River estuary [8] - The upper layer accommodates a six-lane highway with a speed limit of 100 km/h, while the lower layer supports a high-speed railway with speeds of 350 km/h and an intercity railway at 250 km/h [8] - It is recognized as the world's largest span double-tower, double-cable-stayed railway and highway bridge without ballast track [8]

Core Points - The completion of the last road beam assembly for the non-navigation hole of the Chongqi Railway and Highway Yangtze River Bridge marks a significant milestone in the construction process [1][3] - The bridge, with a total length of 4.09 kilometers, is a key control project for the high-speed rail connecting Shanghai, Nanjing, and Hefei, and is recognized as the world's largest span double-tower, double-cable surface railway and highway dual-use cable-stayed bridge [5] Group 1 - The non-navigation hole bridge spans 2,197.4 meters and consists of 16 piers, with 6 piers on the north side serving as the main navigation hole and 10 piers on the south side as non-navigation holes [1] - The non-navigation hole bridge features an 11-hole continuous steel truss beam with a total span arrangement of 99.2 + 9×112 + 98.2 = 1,205.4 meters, utilizing a double main truss triangular arrangement [1] - The construction employed a "shore-side scattered assembly + multi-point synchronous pushing" method due to water depth restrictions, achieving a total pushing distance of 1,267 meters and a total pushing weight of 38,900 tons, ranking first in domestic similar bridge pushing distance and second in weight [1] Group 2 - The completion of the non-navigation hole bridge's road beam assembly facilitates the final round of pushing and subsequent integration with the main navigation hole steel beams, as well as the installation of the road bridge deck [3] - The project is expected to create a fast new corridor between the Shanghai metropolitan area, Nanjing metropolitan area, and Hefei metropolitan area, optimizing the railway network layout along the Yangtze River and supporting the coordinated development of the Yangtze Economic Belt [5]

Core Points - The successful installation of the E25 segment steel beam marks a significant milestone in the construction of the Chongqi Railway and Highway Yangtze River Bridge, which is a key project for the Shanghai-Nanjing-Hefei high-speed railway [1][3] - The total length of the main navigation hole steel truss beam is 992 meters, with the Shanghai side comprising 512.4 meters and weighing 18,743 tons [3] - The bridge features a dual-layer design for both rail and road use, with the upper layer accommodating a six-lane highway and the lower layer supporting high-speed rail and intercity rail [5] Summary by Sections - **Construction Progress** - The E25 segment steel beam, weighing 523.9 tons and measuring 12.5 meters, has been successfully installed, contributing to a total weight of over 20,000 tons for the main navigation hole beams [1] - A total of 13 segments have been installed, with plans to complete the edge span installation in November [3] - **Bridge Specifications** - The Chongqi Railway and Highway Yangtze River Bridge spans 4.09 kilometers and crosses the northern channel of the Yangtze River estuary [5] - It is recognized as the world's largest span dual-tower, dual-cable-stayed bridge with ballastless track for both rail and road [5] - **Future Developments** - The main bridge's mid-span closure is expected to be achieved in the first quarter of next year [3]

Core Points - The completion of the main towers 3 and 4 of the Chongqi Railway and Highway Yangtze River Bridge marks a significant milestone in the construction of the world's largest span railway and highway cable-stayed bridge [1][2] - The bridge, part of the Shanghai-Chongqing-Lanzhou high-speed railway, spans 4.09 kilometers and features a main span of 400 meters, designed for high-speed rail and intercity rail traffic [1][2] Summary by Sections Construction Details - The main towers are H-shaped reinforced concrete structures, each 153 meters tall, consisting of seven parts including the tower base and top [2] - The project faced challenges due to complex geological conditions, particularly soft sandy soil, which complicated the construction of the foundation piles [2] - The bridge's construction highlights include a total steel beam push length of 1205.4 meters, a new structural design combining concrete slabs and steel trusses, and precise control of construction processes [2] Strategic Importance - Upon completion, the bridge will enhance the railway network layout along the Yangtze River, contributing to the integrated high-quality development of the Yangtze River Delta region [4]

Core Points - The construction of the Chongqi Railway and Highway Yangtze River Bridge, the world's largest span railway and highway cable-stayed bridge, is currently underway, marking a significant milestone in infrastructure development [1][3] - The bridge will allow for a high-speed crossing of the Yangtze River at a speed of 350 km/h without reduction, enhancing transportation efficiency [1][5] Group 1: Bridge Specifications - The Chongqi Bridge spans 4.09 kilometers and features a dual-layer design, with the upper layer accommodating a six-lane highway and the lower layer designed for high-speed and intercity railways [3][4] - The main navigation span of the bridge reaches 400 meters, making it the largest span railway and highway cable-stayed bridge under construction globally [3][4] Group 2: Construction Challenges and Innovations - The construction faced challenges due to complex geological conditions, including soft sandy soil, and tidal influences affecting the construction process [4] - The project has achieved several records, including the longest steel beam push length of 1205.4 meters for a railway and highway bridge, and the implementation of a new structural design combining concrete slabs and steel trusses [4] Group 3: Economic and Regional Impact - The completion of the bridge is expected to optimize the railway network layout along the Yangtze River, contributing to the integrated development of the Yangtze River Delta and promoting high-quality growth in the region [5]

Core Viewpoint - The successful completion of the continuous beam for the high-speed rail line at the southern approach of the Chongqi Railway and Highway Yangtze River Bridge marks a significant milestone in the construction of this critical infrastructure project, which is expected to enhance connectivity in the Yangtze River Delta region [1][4][7]. Group 1: Project Details - The Chongqi Railway and Highway Yangtze River Bridge is located in Qidong City, Jiangsu Province, featuring an upper layer for highways and a lower layer for high-speed and intercity rail lines, with a total length of 830.05 meters and 19 piers [4]. - The continuous beam that has successfully completed spans the Long Island Avenue, with dimensions of (36.625 + 56 + 36.625) meters, utilizing a variable cross-section prestressed concrete design [4]. - The bridge's box girder has a top width of 12.6 meters, a bottom width of 6.7 meters, and varying heights, with the central section reaching 4.335 meters [4]. Group 2: Strategic Importance - The Chongqi Railway and Highway Yangtze River Bridge is a key node in the high-speed rail network connecting Shanghai, Nanjing, and Hefei, with a total length of 4.09 kilometers [7]. - Upon completion, the bridge will establish a rapid new corridor between the Shanghai metropolitan area, Nanjing metropolitan area, and Hefei metropolitan area, significantly optimizing the railway network layout along the Yangtze River [7]. - The project is expected to facilitate the coordinated development of the Yangtze Economic Belt and promote high-quality integration in the Yangtze River Delta region [7].