Core Points - The Ningbo-Zhoushan Railway's underwater tunnel, known as the Jintang Submarine Tunnel, is a record-breaking engineering project, measuring 16.18 kilometers in total length, with an underwater section of 11.21 kilometers, making it the world's longest underwater high-speed rail tunnel [1][5] - The construction employs two shield machines that start from both Ningbo and Zhoushan sides, facing each other to ensure precise alignment after traversing complex geological conditions [1][2] - The project is significant for the integration of the Yangtze River Delta region, as it will end the historical lack of railway access to Zhoushan upon completion [5] Construction Details - As of May 2024, the shield machine has advanced nearly 2,400 meters, currently located about 65 meters below sea level, marking a critical phase as it transitions from land to marine construction [2] - The shield machine must navigate through various geological layers, including four soft soil sections and eight hard rock sections, with hard rock layers comprising nearly 70% of the total [2][4] - Advanced technologies, such as a proactive geological forecasting system, are utilized to monitor geological conditions ahead of the shield machine, enhancing safety and efficiency [4] Workforce and Timeline - The project employs over 200 workers who operate in two shifts around the clock, with the tunnel expected to connect with the Zhoushan side by the end of 2026 [5] - The project is positioned as a key initiative within China's 14th Five-Year Plan, emphasizing the urgency and commitment to high-quality project execution [5]

Core Points - The Ningbo-Zhoushan Railway's underwater tunnel, known as the Jintang Submarine Tunnel, is a record-breaking engineering project, measuring 16.18 kilometers in total length, with an underwater section of 11.21 kilometers and a maximum depth of 78 meters, making it the world's longest underwater high-speed rail tunnel [2][3] - The construction employs two shield machines that start from both Ningbo and Zhoushan sides, advancing towards each other while navigating high water pressure and complex geological conditions [2] - The project is significant for the integration of the Yangtze River Delta region, as it will end the historical lack of railway access to Zhoushan upon completion in late 2026 [7] Construction Details - As of May 2024, the shield machine has advanced nearly 2,400 meters, currently located about 65 meters below sea level, marking a critical phase as it transitions from land to marine construction [3] - The shield machine must traverse various geological layers, including 4 segments of soft soil and 8 segments of hard rock, with hard rock layers comprising nearly 70% of the total [3] - Advanced technologies, such as a proactive geological forecasting system, are utilized to enhance the precision of geological assessments and improve construction safety [5] Workforce and Project Management - The project employs over 200 workers who operate in two shifts around the clock to ensure continuous progress [7] - The project team is committed to maintaining high-quality standards and timely completion, aligning with the goals of the 14th Five-Year Plan [7]

浙江宁波北仑区与舟山定海区金塘镇之间，是繁忙的金塘水道。在海面下60余米处，是一项创纪录的世 界级工程——甬舟铁路金塘海底隧道。近日，记者来到金塘海底隧道宁波侧施工现场，感受建设者们的 火热干劲。 金塘海底隧道是甬舟铁路全线的控制性工程之一，全长16.18公里，其中海底盾构段长11.21公里，最大 埋深达78米，也是世界最长的海底高铁隧道。 "隧道的施工采用两台盾构机从宁波侧和舟山侧同时始发，相向掘进，穿越高水压及多种复杂地层后， 在海底实现精准对接。"坐上工程用车，向"甬舟号"盾构机前进的途中，中铁十四局甬舟铁路项目盾构 经理赵大彬告诉记者，金塘海底隧道是继港珠澳大桥后，我国又一项挑战世界难题、突破科技壁垒的跨 海大工程。 沿着最大坡度10%的一号斜井下行没多久，就遇到"驮"着3片每片重量达14吨左右管片缓缓前进的双头 运输车。"管片是盾构隧道的主要装配构件，主要用于为隧道打造一圈保护屏障，'甬舟号'盾构机承担 着24680块管片的拼装任务，拼装由作业人员利用拼装遥控器完成，新技术对工程质量管控和效率提升 都有很大帮助。"赵大彬说。 自2024年5月"甬舟号"盾构机始发以来，目前已掘进近2400米，深度位于 ...

近日，在甬舟铁路金塘海底隧道宁波侧地下64米深处，"甬舟号"盾构机成功穿越海堤，由陆域段进入海 域段掘进施工，标志着世界最长海底高铁隧道全面进入"穿海之旅"。金塘海底隧道是甬舟铁路全线控制 性工程，位于宁波与舟山之间金塘水道下方，西起宁波市北仑区，东至舟山市金塘镇，全长16.18公 里，其中盾构段长11.21公里，是世界最长海底高铁隧道。(浙江发布) ...