“蜀安号”盾构段顺利贯通

Core Viewpoint - The Chengyu Central High-Speed Railway's Shuan Tunnel has achieved a significant milestone with the successful completion of the "Shu'an" shield tunneling section, laying a solid foundation for the timely completion and operation of the entire railway line [3]. Group 1: Project Progress - The "Shu'an" tunnel, a key project of the Chengyu Central High-Speed Railway, has a total length of 10,380 meters, utilizing both "shield tunneling and open-cut methods" for construction [3]. - The shield section of the tunnel spans 9,824 meters, making it the longest and largest diameter earth pressure balance shield tunnel currently in operation in China [3]. - Two shield machines, "Shu'an" and "Chengyu," are working together to expedite the construction, with each machine having advanced tunneling distances of approximately 5.3 kilometers and 4.5 kilometers respectively [3]. Group 2: Technical Innovations - The "Shu'an" shield machine has a diameter of 14.5 meters, a total length of 155 meters, and weighs about 3,300 tons, making it the largest diameter earth pressure balance shield machine in use in China [3]. - The machine's core modules have been specifically designed to address challenges posed by the medium to weak weathered mudstone strata in Chengdu, effectively solving global construction issues such as mud cake formation and rapid tool wear [3]. - The project team has developed an intelligent construction system comprising "1 intelligent device + 2 major management platforms + 1 intelligent system," integrating advanced technology into the "Shu'an" machine [4]. Group 3: Construction Challenges - The "Shu'an" shield machine has successfully traversed over 30 critical structures, including operational railways, elevated bridges, and municipal pipelines, with a strict settlement control precision of within 1 millimeter per instance [4]. - The construction difficulty is likened to "carving in tofu" and "threading a needle beside a vital artery," highlighting the complexity and precision required in the project [4].