中新网嘉兴9月28日电(黄彦君)9月27日，杭州湾跨海铁路大桥建设迎来重大节点——由沪杭客专公司统 筹管理，中铁大桥院与中国铁设联合设计，中铁大桥局承建的全桥首孔80米预制混凝土箱梁，顺利完成 107-108#桥墩架设任务。 这一里程碑式突破，宣告杭州湾跨海铁路大桥全面进入上部结构施工新阶段，为后续工程推进奠定基 础。 "天一号"是国内首创单体船型结构、全电力推进的海上架梁施工专用起重船，最大起吊重量为3600吨， 可独立完成取梁、运梁和架梁工作。 为了按期优质完成梁体的取、运、架等施工任务，中铁大桥局依托精准潮汐测算，"天一号"在低平潮取 梁、涨潮期运输、平潮期落梁，落梁误差控制在毫米级，完成与潮汐赛跑的"精准手术"；同时，在"天 一号"船体、臂架和吊具上布设85组智能传感器，在海上指挥调度中心的监控大屏上，实时对船舶状 态、结构受力和变形、吊装动作等10多类大数据进行秒级反馈和智能监控，实现架梁全过程风险管控。 中铁大桥局项目经理蒋本俊表示，本次107-108#墩首孔箱梁成功架设，标志着大桥已全面进入上部结构 施工阶段。目前，大桥建设正按计划稳步推进，预计2026年底将完成海中引桥主体工程，2027年底建 ...

Core Points - The article highlights significant advancements in transportation infrastructure in China, including the expansion of railways, highways, and ports, which are expected to enhance economic connectivity and efficiency. Group 1: Transportation Infrastructure Expansion - The railway operating mileage has reached 162,000 kilometers, an increase of approximately 16,000 kilometers compared to the end of the 13th Five-Year Plan [1] - The total highway mileage has reached 5,490,000 kilometers, an increase of about 290,000 kilometers [1] - The number of port berths for vessels over 10,000 tons has reached 2,971, an increase of 379 [1] Group 2: Economic Impact of Infrastructure - Approximately 180 million people traveled across regions, and 160 million tons of goods were transported, along with 478 million express deliveries [2] - The successful construction of major underwater tunnels and bridges, such as the Jiaozhou Bay Second Undersea Tunnel and the Hangzhou Bay Cross-Sea Railway Bridge, is expected to significantly improve transportation efficiency [5][6] - The opening of the Shenzhen-Zhongshan Channel has led to a high volume of traffic, with over 3 million public transport passengers crossing cities within a year, and a 15% reduction in freight distance between Shenzhen and Zhongshan, resulting in a 20% decrease in transportation costs per shipment [6] Group 3: Regional Economic Development - The opening of the Huangmaohai Cross-Sea Channel has highlighted the regional advantages of Jiangmen, with over 11 million tourists and a tourism revenue of 11.74 billion yuan, reflecting year-on-year growth of 15.4% and 12.5% respectively [6] - The construction of the Shenzhen-Zhongshan Channel has encouraged Shenzhen enterprises to establish bases in Zhongshan, creating a "Shenzhen headquarters + Zhongshan base" development model [7] - The development of more cross-sea channels is anticipated to drive new economic and social advancements in the region [8]

跑出建设"加速度" 通苏嘉甬高速铁路是国家"八纵八横"铁路网沿海通道的重要组成部分，串联起江苏南通、江苏苏州、浙江嘉兴、浙江宁波四座城市，是长三角城市群的重要 骨干线路。杭州湾跨海铁路大桥是通苏嘉甬高速铁路的控制性工程。 这个"五一"期间，许多建设者坚守岗位。杭州湾跨海铁路大桥跑出建设"加速度"，黑龙江高寒冻土区架起了"钢铁脊梁"。 杭州湾跨海铁路大桥 杭州湾跨海铁路大桥全长29.2公里，由北、中、南三座航道桥和跨北大堤引桥、海中引桥、浅滩区引桥组成。 杭州湾跨海铁路大桥北航道桥9号墩，是杭州湾北侧第一个离岸的主墩。从9号墩主塔向北、向南延伸的杭州湾海面上，441个海中墩上在进行不同程度的施 工作业，整条杭州湾跨海铁路大桥的施工进度完成了约50%。 工程师介绍，在杭州湾上建桥面临非常多的挑战。这里海域宽阔，风大流速急，湾底的泥沙质地松软、水深也比较浅，潮水具有明显的潮汐现象，每天都会 出现两次高潮位和两次低潮位。运输物料、器械的船舶，只能在满足船舶通行的安全潮位时间内工作，否则就会存在搁浅的风险。 高寒冻土区架起"钢铁脊梁" 在黑龙江，哈尔滨至伊春高铁正在加紧施工，哈伊高铁是我国"八纵八横"高铁网京哈至京港澳 ...