世界最长海底高铁隧道全面进入海域段施工

Core Viewpoint - The successful crossing of the "Yongzhou" shield machine into the marine section marks the commencement of the underwater construction phase of the world's longest underwater high-speed rail tunnel, the Jintang Undersea Tunnel, which is a critical project for the Yongzhou Railway [1] Group 1: Project Overview - The Jintang Undersea Tunnel is located beneath the Jintang Waterway, connecting Ningbo and Zhoushan, with a total length of 16.18 kilometers [1] - The shield section of the tunnel measures 11.21 kilometers, making it the longest underwater high-speed rail tunnel in the world [1] Group 2: Construction Milestone - The shield machine successfully traversed the seawall, transitioning from land to marine excavation, indicating significant progress in the construction timeline [1]