“甬舟号”盾构机开启穿海之旅

Core Insights - The successful crossing of the sea embankment by the "Yongzhou" shield machine marks the full commencement of the world's longest underwater high-speed rail tunnel construction [1] Group 1: Project Overview - The Jintang underwater tunnel, located between Ningbo and Zhoushan, has a total length of 16.18 kilometers and utilizes two shield machines for simultaneous excavation and connection underwater [1] - The underwater section of the tunnel is 11.21 kilometers long, with a maximum burial depth of 78 meters, and the construction is expected to take three years [6] Group 2: Technological Innovations - The "Yongzhou" shield machine is equipped with advanced technologies such as a rolling cutter wear monitoring system and a geological forecasting system to handle complex geological conditions [2][3] - The number of rolling cutters on the "Yongzhou" shield machine has been increased to 300, enhancing its rock-breaking capability and wear resistance [2] - A digital shield system allows for remote operation and real-time monitoring of the shield machine's parameters, improving safety and efficiency during construction [4] Group 3: Specialized Techniques - Saturated diving technology is employed for high-pressure tool replacement, allowing divers to work for up to 28 days under high pressure, which is essential for the maintenance of the shield machine [6] - The project has established multiple research topics focused on enhancing performance in complex geological and marine environments, resulting in several innovative tools and methods [6]