天陇铁路天水境内首条隧道贯通

Core Viewpoint - The successful completion of the Liulin Tunnel marks a significant milestone in the construction of the Tianlong Railway, which is the first fully self-funded and constructed railway project in Gansu Province, showcasing the project's progress and the challenges overcome during its development [1][2]. Group 1: Project Details - The Liulin Tunnel is a single-hole, single-line tunnel with a total length of 15,152 meters and a maximum burial depth of approximately 422 meters, designed for a speed of 160 km/h [1]. - The tunnel is a key control project for the Tianlong Railway, which traverses the complex geological structure of the Qinling Mountains and faces significant construction challenges, including a maximum daily water inflow of 20,462 cubic meters [1][2]. Group 2: Construction and Environmental Considerations - The project is led by China Railway City Investment Group, with China Railway Second Bureau responsible for construction, emphasizing the use of advanced technologies such as predictive geological surveys and laser scanning to address technical difficulties [2]. - The construction adheres to a "green engineering" philosophy, implementing strict environmental protection standards and measures to ensure "zero pollution" during the construction process, particularly in sensitive ecological areas [2]. Group 3: Strategic Importance - The Tianlong Railway serves as a vital link between southeastern Gansu and the Sichuan-Chongqing region, filling a gap in the regional transportation network and significantly enhancing connectivity [2]. - The completion of the Liulin Tunnel clears a critical obstacle for subsequent construction phases, including track laying and electrical engineering, thereby accelerating the overall progress of the Tianlong Railway project [2].