一隧连川渝 成达万高铁光明隧道贯通

Core Viewpoint - The Chengda-Wanzhou High-Speed Railway (成达万高铁) is a significant infrastructure project in China, with the completion of the Guangming Tunnel marking a key milestone in its construction. The railway is expected to enhance connectivity between major cities, reducing travel time significantly by 2027 [3][5]. Group 1: Project Progress - The Guangming Tunnel, a critical component of the Chengda-Wanzhou High-Speed Railway, has been completed, with 132 out of 136 designed tunnels already finished [3]. - The project has entered the construction phase for the ballastless track bed, station buildings, and electrical systems [3]. - The entire railway line has completed approximately 46 million cubic meters of earthworks, accounting for 98.87% of the total [4]. Group 2: Technical Details - The Guangming Tunnel spans over 8 kilometers and is designed for a speed of 350 kilometers per hour, featuring a single-hole double-track low-gas tunnel [3]. - The construction faced challenges such as unstable surrounding rock, mud and water bursts, and the presence of harmful gases, necessitating advanced safety measures [3][4]. - The project management team utilized specialized mining explosives and digital detonators to enhance safety during construction [3]. Group 3: Strategic Importance - The Chengda-Wanzhou High-Speed Railway is a vital part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, connecting key regions [5]. - Upon completion in 2027, the railway will reduce travel time from Chengdu to Shanghai and Beijing to under 7 hours [3][5].