提前80天，潍宿高铁至青岛连接线首座超千米隧道贯通

Core Insights - The construction of the Weishui High-speed Railway to Qingdao connection line has made significant progress with the successful completion of the Iron Jue Mountain Tunnel, which is the first tunnel over 1,000 meters in length on this line [1][3] Group 1: Project Details - The Iron Jue Mountain Tunnel measures 1,292.6 meters in length and is a single-tube double-track tunnel, facing complex surrounding rock conditions, with a V-grade surrounding rock section of 187.6 meters [3] - The construction utilized a dynamic optimization blasting scheme and incorporated advanced technologies such as a fully automated digital 3D laser scanning system and an intelligent information platform for real-time monitoring and safety [3] - The tunnel was completed 80 days ahead of the scheduled timeline, showcasing effective risk management and accelerated construction progress [3] Group 2: Strategic Importance - The Weishui High-speed Railway to Qingdao connection line spans 108.78 kilometers and serves as an auxiliary channel to the Beijing-Shanghai High-speed Railway, part of the national "Eight Vertical and Eight Horizontal" high-speed rail network [3] - Once completed, the line will significantly enhance passenger travel and economic exchanges between the Jiaodong Peninsula, Beijing-Tianjin-Hebei region, and the Yangtze River Delta, contributing to regional connectivity and economic development [3]