兴山东隧道全隧贯通 宜兴高铁主体工程全线完工

Group 1 - The core point of the article is the successful completion of the Xingshan East Tunnel, a key project for the Yixing High-Speed Railway, marking the overall completion of the main engineering work for the railway [1][5]. - The Xingshan East Tunnel, located in Xingshan County, Yichang City, has a total length of 16.88 kilometers and traverses complex geological conditions, including seven fault fracture zones and a maximum burial depth of 1,256 meters [3]. - The construction faced significant challenges, including high temperature, deep burial, high gas levels, and high geostress, which posed safety risks and operational difficulties [3]. Group 2 - The construction unit employed "anchor cable + steel belt traction" technology to stabilize the fractured surrounding rock, ensuring the tunnel's successful completion [5]. - The Yixing High-Speed Railway is a crucial project in the national "13th Five-Year Plan," with a total length of 108.38 kilometers and a design speed of 350 kilometers per hour, serving as a key link between the Zhengzhou-Chongqing High-Speed Railway and the Shanghai-Chongqing-Lanzhou High-Speed Railway [5]. - The completion of the project is significant for enhancing the comprehensive and three-dimensional transportation system of the Yangtze River Economic Belt [5].