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]

Group 1 - The construction of the 108 New Line Expressway is progressing rapidly, with significant developments such as the initial formation of tunnel entrances and the establishment of bridge piers [1] - During the "May Day" holiday, over 400 workers continued construction efforts, with project manager Kong Yongming overseeing daily plans and safety checks [1] - The project includes key structures like the Dongzhuangzi Bridge and the Jiangjun Tuo Interchange, which are crucial for connecting to National Highway 108 Phase III [1] Group 2 - The only service area along the route, Fozizhuang Service Area, is being constructed using tunnel spoil to fill the rugged terrain, with a total area of 2.4 hectares [2] - The 108 New Line Expressway spans approximately 60 kilometers, with a bridge-tunnel ratio of about 88%, indicating a complex construction environment [2] - The project is expected to enhance disaster resilience and transportation integration in the western mountainous region, contributing to the economic and social development of the area [2]