甘肃首条自主投资铁路迎突破！天陇铁路首条特长隧道贯通

Core Points - The completion of the last blasting operation marks the breakthrough of the Xujiaping Tunnel, the first long tunnel of the Tianlong Railway, which is a significant milestone for the railway's construction [1][3] - The Tianlong Railway, connecting Tianshui and Longnan, is part of Gansu Province's "14th Five-Year" comprehensive transportation development plan and is the first fully self-funded and constructed single-line passenger and freight railway in the province [3][4] - The project, undertaken by China Railway Fourth Bureau, features a total length of 17.97 kilometers, with the Xujiaping Tunnel measuring 16.27 kilometers and reaching a maximum depth of 600 meters [3][4] Construction Management - A "three-level linkage" management mechanism has been established to coordinate design, construction, and monitoring, ensuring safety and quality through regular expert evaluations and targeted management measures [3][4] - The construction team follows strict principles including advanced monitoring, reinforcement, and support to ensure safe and efficient tunnel excavation [4][6] Technological Advancements - The project employs advanced technologies such as TSP geological forecasting systems and geological radar, completing over 200 rock monitoring sessions and issuing early warnings for 47 risk areas [6] - The use of energy-accumulating blasting technology and various construction methods has increased the average excavation rate from 7 meters to 8 meters per day, enhancing construction efficiency by approximately 20% [6] Strategic Importance - The Tianlong Railway, with a total length of 208.207 kilometers and a design speed of 160 km/h, will connect with the Longhai Railway and Lanzhou-Chongqing Railway, playing a crucial role in enhancing the transportation capacity of the western land-sea new corridor [6]