长赣高铁江西段主体工程开工

Core Viewpoint - The commencement of construction for the Lianhua Tunnel marks the start of the main engineering phase for the Chang-Gan High-Speed Railway in Jiangxi Province, which is a significant step towards the full construction of the railway [1][2] Group 1: Project Overview - The Chang-Gan High-Speed Railway spans 429.5 kilometers from Changsha in Hunan to Ganzhou in Jiangxi, with a designed speed of 350 kilometers per hour [1] - The Jiangxi section of the railway is 297.6 kilometers long, featuring 176 new bridges and 83 tunnels, resulting in a bridge-tunnel ratio of 88.24% [1] - The railway will include nine stations in Jiangxi, with five new stations and four existing ones, and the construction period is planned for five years [1] Group 2: Technical Aspects - The Lianhua Tunnel, which is 4.9 kilometers long, is one of seven high-risk tunnels in the Jiangxi section, located in an area with challenging geological conditions [1] - Advanced technologies such as geological sketching, radar, and horizontal drilling are being utilized for geological forecasting to understand the conditions ahead of the tunnel [1] - The project team is employing fully mechanized equipment for tunnel excavation and initial support, which reduces risks for workers and ensures construction quality [1][2] Group 3: Strategic Importance - The Chang-Gan High-Speed Railway is a key component of China's "Eight Vertical and Eight Horizontal" high-speed rail network, specifically part of the "Chongqing-Xiamen Corridor" [2] - Once completed, the railway will significantly reduce travel time from Changsha to Ganzhou from approximately 4 hours to as fast as 1.5 hours, enhancing connectivity and promoting regional development [2]