延榆高铁延安段首座隧道顺利贯通

Core Points - The Jinjiagou Tunnel of the Yan'an to Yulin High-Speed Railway successfully completed its construction on January 27, marking a significant milestone in the project's development [1] - The tunnel, located in Yan'an, Shaanxi Province, is 703.39 meters long and presents high construction risks due to its location in a typical loess gully area [1] - The project employs advanced intelligent construction equipment, enhancing mechanization, automation, and standardization, which significantly improves construction efficiency and ensures safety and quality during winter [1] - The Yan'an to Yulin High-Speed Railway is a crucial part of the national "eight vertical and eight horizontal" high-speed rail network, reducing travel time from Xi'an to Yulin from over 5 hours to approximately 2 hours, which is vital for improving transportation infrastructure in the Shaanxi region and promoting high-quality economic development in revolutionary old areas [1]