在房山溶洞群中“打隧道”，108新线高速首条隧道贯通

Core Viewpoint - The successful completion of the 1760-meter He Dong Village Tunnel marks a significant milestone for the 108 New Line Expressway, enhancing transportation infrastructure in Beijing's western mountainous areas and contributing to disaster resilience and regional economic development [1][2][3] Group 1: Project Overview - The 108 New Line Expressway spans approximately 59.79 kilometers, connecting Qinglonghu Town to the city boundary, and includes 41 bridges, 20 tunnels, and 9 interchanges currently under construction [2] - The He Dong Village Tunnel is a key control project within the expressway, with a challenging geological environment characterized by V-grade surrounding rock accounting for 41% and significant elevation differences [2] Group 2: Construction Challenges and Solutions - The project team utilized advanced geological forecasting techniques, including geological radar and pre-drilling, to navigate the complex karst geology of the region, which is known for its dense distribution of limestone caves [3] - An adaptive construction plan was implemented to optimize excavation during favorable weather while ensuring support during adverse conditions, aimed at minimizing project delays [2][3] Group 3: Future Implications - The completion of the He Dong Village Tunnel is expected to provide valuable experience for similar tunnel projects along the 108 New Line Expressway, facilitating timely construction and enhancing overall project efficiency [3] - The expressway is part of a broader initiative to improve disaster response capabilities and promote integrated transportation development in the Beijing-Tianjin-Hebei region [1]