全长24.8公里 渝昆高铁全线最长隧道右线贯通

Core Points - The Yiliang Tunnel right line of the Yukun High-speed Railway, constructed by China Railway Construction Bridge Bureau, has successfully completed its safe breakthrough after over 1460 days of continuous work [1][3] - The tunnel, located in Yunnan Province, spans 24.8 kilometers with a maximum depth of 920 meters, designed in a double-tunnel single-line format [1][3] Construction Progress - The breakthrough of the right line has accurately identified geological conditions, significantly improved ventilation and drainage, and effectively reduced geological risks, enhancing safety and efficiency for subsequent construction [3] - With the completion of the right line, 47 tunnels in the Yunnan section of the Yukun High-speed Railway have been completed, exceeding 85% of the total tunnel work [3] - The Yukun High-speed Railway, approximately 700 kilometers long with a Yunnan section of 388.6 kilometers, is designed for a speed of 350 kilometers per hour, marking it as the first high-speed railway in Yunnan to reach this speed [3] Economic Impact - Once completed, the railway will significantly reduce travel time between Chongqing and Kunming, playing a crucial role in constructing a new development pattern and promoting high-quality economic and social development in the surrounding areas [3]