新建西宁至成都铁路若尔盖隧道贯通

Core Points - The successful completion of the Ruoergai Tunnel marks a significant milestone in the construction of the Xining to Chengdu Railway, which is part of China's "Eight Vertical and Eight Horizontal" high-speed rail network [1][2] - The Xining to Chengdu Railway spans approximately 170 kilometers in Sichuan, with most sections at an altitude of around 3,500 meters [1] - The Ruoergai Tunnel, a single-hole double-track tunnel, is 2,176.92 meters long and designed for a speed of 200 km/h, presenting complex geological conditions and high construction risks [1] Construction Progress - As of now, the tunnel engineering in the Sichuan section of the Xining to Chengdu Railway has reached 66.2% completion, with five tunnels already connected [2] - Bridge engineering is 77.5% complete, and roadbed engineering is at 58.8%, indicating that all construction activities are progressing in an orderly manner [2] Investment and Economic Impact - The construction of the Xining to Chengdu Railway in the Sichuan section involves investment from Shudao Investment Group, and the completed railway is expected to greatly facilitate travel for local residents and promote economic and social development along the route [2]