Group 1 - The Su Nan Grand Bridge, a key project of the Tong Su Jia Yong High-Speed Railway, has successfully completed the main span of the Bai Xian Jiang continuous beam-arch combination bridge, marking a significant milestone in the construction of the railway [1] - The bridge spans 25 kilometers and crosses various structures, including roads, rivers, and residential areas, making it a highly technical and challenging project [1][2] - The bridge features a prestressed concrete continuous beam-arch structure with a main span of 180 meters and a design height of 36 meters, utilizing advanced construction techniques [1][2] Group 2 - The project has completed 6,168 pile foundations, 678 pier bodies, and 683 bearing platforms, with 14 out of 22 continuous beams already completed [2] - The total output value of the project has reached 1.65 billion yuan, accounting for approximately 80% of the total investment [2] - The project is expected to complete the construction of the bridge's lower structure and special structures by 2026 [3]

Core Viewpoint - The successful completion of the main span of the Su Nan Grand Bridge marks a significant milestone in the construction of the Tong Su Jia Yong High-Speed Railway, enhancing connectivity in the Yangtze River Delta region [1][2] Group 1: Project Overview - The Su Nan Grand Bridge spans 25 kilometers and crosses multiple existing roads, rivers, lakes, residential areas, and industrial sites, making it a key engineering project for the Tong Su Jia Yong Railway [1] - The main span of the bridge, known as the Niu Chang Jing continuous beam, measures 329.6 meters and employs a single-box double-chamber cross-section design with cantilever construction methods [1] - The project faces challenges due to its complex structure, high technical requirements, and dense surrounding rivers and complicated geological conditions [1] Group 2: Safety and Management - The construction unit prioritizes safety production, implementing a strict safety responsibility system with detailed division of responsibilities [2] - Daily safety management work lists are published to identify and eliminate potential hazards, ensuring project safety and stability [2] - A safety management atmosphere is fostered through various initiatives, including the involvement of community safety officers and monthly evaluations [2] Group 3: Strategic Importance - The Tong Su Jia Yong High-Speed Railway is a crucial part of the national medium- and long-term railway network planning, specifically the "Eight Verticals and Eight Horizontals" high-speed railway main corridor [2] - Once completed, the railway will significantly reduce travel time between core cities in the Yangtze River Delta, promoting high-quality development and integration in the region [2]