On May 15, the "Block 0" of Pier 305 of the continuous girder crossing the Dazhi River on Section 3 of the Shanghai Municipal Railway Nanhui Branch Line, invested and constructed by Shanghai Shentie and built by China Railway 16th Bureau, was successfully poured, laying a solid foundation for the subsequent cantilever casting construction of the main girder using form travelers.

The (84+166+84) m continuous girder crossing the Dazhi River is the largest main-span continuous girder in the bridge section of the entire Nanhui Branch Line, and is also a key controlling node project for the erection of precast girders in the elevated section between Xiayan Road Station and Dongda Highway Station. The "Block 0" of Pier 305 poured this time is 16 m long, 10.8 m high, and 10.8 m wide at the bridge deck, with a design of approximately 862.55 cubic meters of C55 concrete. It adopts steel pipe column supports, with wooden formwork for the inner and bottom forms and customized steel formwork for the side forms.

During construction, there were difficulties such as dense reinforcement, relatively large height of web reinforcement, high installation difficulty, concentrated prestressed ducts, numerous embedded parts, and complex structural forces. Under the overall deployment and advance organization of Shanghai Shentie, the project team adopted multiple measures and a multi-pronged approach to ensure safe and efficient completion of the project construction. First, the preloading process was optimized. To ensure the safety of the "Block 0" preloading while shortening the preloading cycle, the project adopted embedded finish-rolled threaded steel bar reverse-tension preloading. Compared with conventional surcharge preloading, it features simple operation, low safety risk, short construction cycle, and economic efficiency, greatly improving the preloading effect and construction progress. Second, investment in construction resources was increased. For all "Block 0" construction operations with available conditions, materials, personnel, and machinery were arranged through scientific planning, and 24-hour shift operations were implemented at construction sites with better working conditions. Third, safety and quality control was comprehensively strengthened. The safety production responsibility system was strictly implemented, pre-job training and safety warning education were carried out, and the technical procedures and operating standards for each process step were clarified to ensure that every process step was precise and error-free, strictly controlling quality, safety, and standards, and ensuring safe and efficient continuous girder construction operations.

The Nanhui Branch Line has a total length of approximately 34.86 km, including a main line of approximately 27.88 km and an east branch line of approximately 6.98 km. The entire line has 6 stations, and the maximum operating speed of trains is 160 km/h. After the project is completed, it will become a rapid connection channel between the Lingang Special Area and the Pudong Hub, Hongqiao Hub, and the main urban area of Shanghai. As an important support for the Lingang Special Area to radiate into the Yangtze River Delta, it will help the Lingang Special Area realize the function of an international open hub featuring "internal and external connectivity and land-sea-air linkage".