Core Points - The Tianjin Metro Line 8 has achieved a significant milestone with the successful "tunnel completion" of its first phase and extension, laying a solid foundation for future operations [1] - This line is the first in Tianjin to utilize fully automated driverless technology (GoA4 level) and is equipped with a comprehensive smart operation and health management system [1] - The line spans 23 kilometers from Zhongbei Town Station in Xiqing District to Lushuidao Station in Jinnan District, featuring 21 stations and 21 sections, along with the construction of a new substation [1] Construction Challenges - The construction faced numerous world-class challenges, earning the title of "King of Challenges" in Tianjin's metro construction history, including five river crossings, three railway crossings, and seven existing metro crossings [1][2] - The project required coordination with seven other lines for transfers and reserved conditions for four future lines, with significant difficulties in land acquisition and protection of surrounding buildings and underground structures [1][2] - Special vibration reduction measures were implemented, with 65% of the line consisting of high-grade vibration reduction sections, and the Dawangfang Station being the deepest metro station under construction in Tianjin [1][2] Technological Innovations - The construction team utilized advanced technologies such as comprehensive geological radar detection, automated real-time monitoring systems, and precise settlement control techniques [2] - Innovative applications included soil improvement processes, optimization of shield tunneling parameters, and the establishment of emergency response mechanisms to overcome key technical bottlenecks [2] - As of now, all main structures of the 21 stations have been completed, and 17 out of 19 connection passages have been successfully finished, indicating steady progress in the project [2]

Core Points - The Tianjin Metro Line 8 has successfully achieved "tunnel completion" for all shield sections, marking a significant milestone in the construction of the line [1][2] - This line is the first in Tianjin to utilize fully automated driverless technology and is designed as a major transportation backbone in the southern urban area [1] - The project is implemented through an integrated "investment-construction-operation" model by China Railway Construction Corporation, involving multiple construction units [1] Summary by Sections - **Construction Progress** - All 21 station structures have been completed, and all 21 sections are now connected, with 17 out of 19 connecting passages finished [2] - **Operational Impact** - Upon opening, the line will connect four administrative districts: Nankai, Heping, Hexi, and Jinnan, enhancing accessibility to key areas such as Anshan West Road and Wudadao [2] - The line is expected to serve as a new engine for urban development, providing a more convenient, efficient, and green travel experience for residents [2] - **Technological Features** - The line is equipped with a state-of-the-art fully automated driving system (GoA4 level) and a comprehensive intelligent operation and maintenance management system to ensure safe and efficient operations [1]