天陇铁路全线重难点控制性工程马街隧道顺利贯通

Core Insights - The Tianlong Railway has successfully completed the challenging Ma Street Tunnel, a key milestone for the project, ensuring timely operation of the entire railway line [1] - The railway spans approximately 208 kilometers, connecting Tianshui City in Gansu Province to Longnan City, with a designed speed of 160 kilometers per hour [1] - The Ma Street Tunnel, measuring 12.4 kilometers, is classified as a high-risk long tunnel, with complex geological conditions and a high percentage of weak rock layers [1] Project Details - The tunnel's maximum depth is 1160 meters, with a minimum depth of 31.6 meters, presenting significant construction challenges due to high ground stress and potential deformation [1] - The project team implemented an innovative "long tunnel short strike" strategy, utilizing two inclined shafts and one cross tunnel, with up to six work fronts operating simultaneously during peak construction [1] - Advanced technologies such as proactive geological forecasting, intelligent monitoring platforms, and 3D laser scanning were employed to ensure the successful excavation of the tunnel [1] Strategic Importance - The Tianlong Railway is a key project in the national medium- and long-term railway network plan and represents Gansu Province's first railway built with independent investment [1] - Once completed, the railway will connect with the Longhai Railway and Lanzhou-Chongqing Railway, enhancing the southward transportation corridor in Gansu and improving the capacity of the new western land-sea corridor [1]