新渝万高铁黑岩寨隧道顺利贯通

Core Insights - The Heiyanzhai Tunnel, located in Chongqing, is a significant infrastructure project with a length of 3,465 meters and a maximum burial depth of approximately 250 meters, presenting considerable construction challenges and safety risks due to geological conditions [1][3]. Group 1: Construction Challenges - The tunnel is situated in a low mountain hilly area with significant terrain fluctuations, leading to high construction difficulty and safety risks, including the potential for gas and harmful gas emissions, as well as collapses in the sandstone and mudstone interlayers [1]. - The construction unit has adopted innovative techniques such as a "36-meter hydraulic trestle + full-section arch steel template" combination, along with advanced equipment like intelligent lining vehicles and fully automatic anchor drilling machines to enhance safety and quality [3]. Group 2: Strategic Importance - The New Chongqing-Wanzhou High-Speed Railway, with a total length of 251 kilometers and a design speed of 350 kilometers per hour, serves as a rapid transit corridor connecting the main urban area of Chongqing with the northeastern region of the Three Gorges Reservoir area [5]. - Upon completion, the railway will significantly reduce travel time between cities along the route, facilitating easier public transportation and accelerating the flow of regional resources, thereby playing a crucial role in the implementation of the Chengdu-Chongqing economic circle strategy and promoting the integration of the Belt and Road Initiative with the Yangtze River Economic Belt [5].