安岚高速岚皋至陕渝界全线贯通

Group 1 - The successful blasting of the last section of rock marks the completion of the dual-line tunnel of the Anlan Expressway, laying a solid foundation for the road to open by the end of the year [1] - The Luoyuanping tunnel, constructed by China Railway 14th Bureau Group, is 413 meters long and located in a challenging mountainous area, making construction difficult and risky [1] - The project team implemented innovative "zero excavation" construction methods and utilized intelligent systems for monitoring to ensure safety and minimize environmental impact [1] Group 2 - The Ankang to Lanrao Expressway is a crucial part of the national expressway network and serves as an important link between Shaanxi and Chongqing [2] - The expressway features a high bridge-tunnel ratio of 96%, the highest in the province, which is significant for mountainous expressway construction [2] - Once completed, the travel time from Ankang to Chongqing Kaizhou will be reduced to 2.5 hours, significantly improving regional transportation and promoting development in the Qinba mountainous area [2]