“平急两用”！京西“生命通道”最难标段三座隧道掘进过半

Core Points - The construction of the 108 New Line Expressway is progressing well, with a significant milestone achieved as 2,500 meters of tunnel excavation has been completed, marking over half of the total excavation [1][3] - The project is crucial for emergency response in the western mountainous areas of Beijing, especially after severe damage from extreme rainfall [7] Group 1: Project Overview - The 6th section of the 108 New Line Expressway spans 5.21 kilometers, starting from the west side of the Yanhe Road interchange and passing through several towns before reaching the Beijing-Hebei border [3] - This section is recognized as the most challenging due to its complex geology and strict ecological protection requirements [3] Group 2: Construction Progress - Three tunnels are being excavated simultaneously, with the Danmugang Tunnel's left and right openings completed, and the North Port Ditch Tunnel excavation reaching 646 meters [3][5] - The construction team has adopted strategies to manage challenges such as loose rock and water ingress, including advanced forecasting and drainage techniques [5] Group 3: Importance of the Project - The 108 New Line Expressway is part of a broader network aimed at enhancing disaster resilience in the region, forming a vital transportation link for emergency situations [7] - The project is expected to improve the overall transportation system in the mountainous areas, providing both regular and emergency access [7]