汕头湾海底隧道是汕汕高铁全线控制性工程，最大坡度达29‰。当前，汕汕高铁汕头南至汕头段进入冲 刺阶段，广汕铁路公司牵头组建了保开通现场工作专班，联合参建各方压实责任、精准施策，及时调配 各类生产资源。 汕汕高铁全线通车后，运输能力将从目前日均24对列车提升至50对以上。在未来，汕汕高铁将与在建的 漳汕高铁连接，进一步提升珠三角、海西、长三角等经济区间的南北向客运能力，为汕头等沿线城市融 入大湾区、连接华东地区提供重要通道。 汕汕高铁始于汕头站，途经汕头市、揭阳市、汕尾市，终至汕尾站，全长162.368公里，设计时速350公 里，该项目汕尾至汕头南段已于2023年12月开通运营。本次铺轨作业由汕头至汕头南段，全长19.8公 里，包含汕头湾海底隧道9.7公里，共需铺设长钢轨32公里。 近日，随着牵引车将一对500米长钢轨稳稳铺设在汕头湾海底隧道左线无砟轨道板上，汕汕高铁汕头南 至汕头段正式进入铺轨施工阶段，为年底具备通车条件奠定了坚实基础。 ...

Group 1 - The first prefabricated box girder of the Zhangshan High-speed Railway was successfully completed, marking a new construction phase for the bridge engineering along the entire line [1][3] - The Zhaoan beam factory, built by Southeast Coastal Railway Fujian Co., Ltd. and constructed by China Railway Bridge Bureau Group, integrates advanced information technologies such as BIM and GIS into the production process [3] - The intelligent system at the Zhaoan beam factory enhances production quality, efficiency, and management levels through real-time data collection and AI analysis, facilitating rapid information transfer between on-site construction and management [3] Group 2 - The Zhangshan High-speed Railway is a key component of the national "Eight Vertical and Eight Horizontal" high-speed railway network, specifically the "Coastal Corridor," which connects major cities in the Guangdong and Fujian provinces [5] - The completion of the project is expected to accelerate communication between the Guangdong-Hong Kong-Macao Greater Bay Area and the Haixi Economic Zone, enhancing connectivity and economic collaboration between Fujian and Guangdong [5]

Core Viewpoint - The construction of the Zhangshan High-speed Railway Dongshan Cross-sea Bridge has entered a new phase, marked by the successful completion of the bridge deck and the first offshore pier, indicating accelerated progress in the project [1][2]. Group 1: Project Overview - The Dongshan Cross-sea Bridge spans 20.26 kilometers, connecting Yunxiao County, Dongshan County, and Zhao'an County in Fujian Province, and is a key control project of the Zhangshan High-speed Railway [1]. - The bridge is constructed by Southeast Coastal Railway Fujian Co., Ltd., with the China Railway Bridge Bureau Group responsible for the construction [1]. Group 2: Construction Techniques and Challenges - The project team utilized advanced technologies, including the Beidou satellite positioning system, to enhance the precision of pile driving operations, ensuring that the construction machinery followed predetermined paths [2]. - The team overcame challenges posed by complex local hydrological conditions and significant tidal differences through an intelligent monitoring system that tracked tidal changes, optimizing the construction schedule [2]. Group 3: Impact on Regional Connectivity - Upon completion, the Zhangshan High-speed Railway will integrate with the Fuzhou-Xiamen High-speed Railway and the Shantou-Shantou High-speed Railway, enhancing the regional transportation network and promoting resource integration between Guangdong and Fujian provinces [2].

Core Points - The successful completion of the last bridge deck panel marks the joining of the Zhangshan High-speed Railway Dongshan Cross-sea Bridge trestle [1][3] - The Dongshan Cross-sea Bridge spans 20.26 kilometers, connecting Yunxiao County, Dongshan County, and Zhao'an County in Fujian Province, and is a key control project of the Zhangshan High-speed Railway [3][5] - The trestle bridge, measuring 9.4 kilometers, serves as an important construction "auxiliary road" and "platform" for the main bridge [3][5] Construction Details - The project faced complex construction conditions, including strong winds and seawater erosion, which were overcome through technical innovations and precise construction methods [5] - The project team utilized the BeiDou satellite positioning system to ensure accurate placement of steel pipe piles, enhancing construction precision [5] - The completion of the trestle bridge allows for a significant reduction in construction distance from 20 kilometers to 9 kilometers, accelerating the overall bridge construction process [7] Strategic Importance - The Zhangshan High-speed Railway is a vital part of the national "eight vertical and eight horizontal" high-speed railway network, enhancing connectivity between the Yangtze River Delta, Guangdong-Hong Kong-Macao Greater Bay Area, and Southeast coastal city clusters [7] - The project is expected to promote the integration of industrial resources between Guangdong and Fujian provinces and facilitate regional economic and social development [7]

Core Viewpoint - The approval of the Zhangshan High-Speed Railway marks a significant advancement in China's "Eight Vertical and Eight Horizontal" high-speed rail network, aiming to enhance connectivity between Fuzhou and Guangzhou, reducing travel time to approximately 3.5 hours [1] Group 1 - The Zhangshan High-Speed Railway has received official approval from the State Council, allowing construction to commence [1] - The railway will span a total length of 174.68 kilometers with a designed speed of 350 kilometers per hour [1] - The route will pass through key locations including Zhangzhou, Longhai, Zhangpu, Yunxiao, Dongshan, and Zhaoan, connecting to Guangdong [1] Group 2 - Upon completion, the Zhangshan High-Speed Railway will integrate with the Fuzhou-Xiamen and Shantou-Shantou high-speed rail lines [1] - This integration will create a high-speed rail corridor between Fuzhou and Guangzhou, facilitating travel at a speed of 350 kilometers per hour [1] - The travel time between Fuzhou and Guangzhou will be significantly reduced to about 3.5 hours, enhancing regional connectivity [1]