深圳⇌南宁2.5小时！这条高铁有新进展！

Core Points - The Shennan High-speed Railway's Shuangbo Tunnel has successfully completed construction, marking a significant milestone in the project [1][3] - The total length of the Shuangbo Tunnel is 1,626.8 meters, with a maximum burial depth of approximately 150 meters, located in a complex geological area [1][3] - The Shennan High-speed Railway will connect Shenzhen and Nanning, covering a total distance of 661 kilometers with a design speed of 350 kilometers per hour [5][7] Construction Techniques - The project team utilized geological radar and advanced drilling technologies for real-time geological detection, completing 126 pre-forecasts and identifying 38 risk points [3] - Different construction methods were employed based on varying rock conditions, with specific techniques for soft and hard rock segments to ensure safety and efficiency [3] - Innovative construction measures, such as the arch bridge template assembly and precise vibration techniques, were implemented to control excavation quality and efficiency [3] Project Impact - Once completed, the travel time between Shenzhen and Nanning will be reduced from 3.5 hours to 2.5 hours, significantly enhancing the connectivity within the Guangdong-Hong Kong-Macao Greater Bay Area [5][7] - The project is expected to improve passenger transport quality and expand railway capacity in the Guangxi and Guangdong regions, benefiting local residents and promoting regional development [5][7]