长春轨道交通7号线轨道全线贯通

Core Viewpoint - The successful completion of the seamless track connection for Changchun Metro Line 7 marks a significant milestone, paving the way for subsequent electromechanical installation, system debugging, and trial operation [1][5]. Group 1: Project Overview - Changchun Metro Line 7 spans from the Automobile Park Station in the Automobile Development Zone to the Donghuan Road Station in the Erdao District, covering four core areas: Automobile Development Zone, Chaoyang District, Nanguan District, and Erdao District [3]. - The line consists of 19 stations, including 8 transfer stations, and features a connection line with Line 6 at Feiyue Square Station [3]. Group 2: Engineering and Construction - To ensure high-quality and efficient project advancement, the project team established a "Party Member Pioneer Assault Team" and a "Technical Breakthrough Group," implementing a "grid management + information monitoring" construction model [3]. - The project employs the CPⅢ precision measurement system for millimeter-level control in track laying and utilizes advanced "mobile flash welding" technology to enhance welding quality while reducing construction dust [3]. Group 3: Future Impact - The completion of this underground line will connect important nodes between the southwest and northeast of the city, optimizing urban spatial layout and enhancing Changchun's overall carrying capacity and radiation capability [5]. - Special vibration-reducing track beds have been designed for sensitive areas, such as those under important facilities and near kindergartens, to minimize the operational impact on the surrounding environment [5].