兰合铁路重难点控制性工程曲奥隧道顺利贯通

Core Viewpoint - The successful completion of the Qucao Tunnel marks a significant breakthrough in the construction of the Lanzhou-Hohhot Railway, laying a solid foundation for the entire line's operation [1] Group 1: Project Overview - The Qucao Tunnel, located in Gansu Province, is a single-hole double-track tunnel with a total length of 10,669 meters [1] - The tunnel faces challenging geological conditions, with over 70% of the surrounding rock classified as grade four and five, presenting high construction risks [1] Group 2: Technological Implementation - The construction team utilized BIM+GIS technology to create a three-dimensional geological model, allowing for precise monitoring of tunnel deformation and timely adjustments to support parameters [1] Group 3: Economic and Social Impact - The Lanzhou-Hohhot Railway is a crucial part of the national "Eight Vertical and Eight Horizontal" high-speed railway network, with a new main line length of 147.42 kilometers and a design speed of 200 kilometers per hour [1] - Once operational, the railway will connect with the Xining-Chengdu Railway, enhancing the regional railway network and ending the historical lack of railway access in certain areas of Gansu Province, which is expected to promote high-quality economic and social development along the route [1]