Jingchu Network (Hubei Daily) News (Correspondent Xiao Fan, Zhu Guanghua, Li Jie) At 2 o'clock in the morning on December 18, the right width of the main span of the Tanjiang Bridge of the Guangdong Yinzhou Lake Expressway undertaken by China Railway Eleventh Bureau Group was successfully closed, which is following the smooth and long on the left on November 6, and the construction of the Tanjiang Bridge has made a major breakthrough again, marking the realization of the main span of the major and difficult control projects of the whole line, laying a solid foundation for the Yinzhou Lake Expressway to open to traffic as scheduled.
The picture shows the Tanjiang Bridge and the dragon activity site
With a total length of 53.36 kilometers, Yinzhouhu Expressway is located in Jiangmen City, Guangdong Province, starting from Tangxia Town, Pengjiang District, and ending at Yamen Town, Xinhui District, adopting the technical standard of two-way six-lane expressway with a design speed of 120 kilometers per hour. The main projects of the Yinzhou Lake Expressway Section 2 Project of China Railway Eleventh Bureau Group are: 2 extra-large bridges, 5 large and medium bridges, 1 tunnel, 2 interchanges, 1 management center, and 4 bid sections with a total of 31.87 kilometers of pavement construction.
The total length of the Tanjiang bridge is 1420 meters, the bridge width is 33 meters, the bridge crosses the Tanjiang waterway, the bridge site is the Tanjiang waterway grade of the inland river III. waterway, the navigable net width is 128 meters, the diameter of the main pier pile foundation is 2.5 meters, the substructure adopts double thin-walled piers, the superstructure adopts 80 + 140 + 80 meters of long-span continuous rigid beam structure across the Tanjiang River, the construction is mainly prestressed concrete continuous steel beam, the project period is tight, the task is heavy, the construction is difficult, the safety risk is high, and it is a major and difficult control project for the whole line.
The picture shows the full width of the Tanjiang Bridge on the Yinzhou Lake Expressway and the scene after the dragon
In order to achieve the closure as scheduled, the Yinzhou Lake Expressway 2 Bid Project of China Railway 11th Bureau Group actively carried out the value creation action of benchmarking world-class enterprises, adhered to innovation and guidance, scientific organization, careful construction, continuously optimized the construction plan, increased investment in personnel, new equipment and new tooling, and strengthened all-round management and whole-process control. At the same time, detailed technical disclosure and guidance were given to the on-site operators, including measurement and lofting, monitoring and measurement in the process, temporary stiffness skeleton locking, thrust stress and displacement control, concrete pouring and other processes were strictly controlled, so as to ensure the smooth closing of the main span in advance.
The picture shows a panoramic view of the Tanjiang Bridge on the Yinzhou Lake Expressway
"The geological conditions of the Tanjiang bridge are complex, the silt is deep, and the pier pile foundation in the water is more than 70 meters long, and we have successfully adopted the reverse circulation drilling technology to ensure the progress and quality of the pile foundation construction; The superstructure of the bridge adopts construction techniques such as climbing formwork and hanging basket to ensure the construction quality, safety and environmental protection of the bridge. Liu Kaibin, project manager of the Yinzhou Lake Expressway 2 standard of China Railway 11th Bureau Group, said.
Guangdong Yinzhou Lake Expressway is a pilot project for Jiangmen to integrate into the construction of the Guangdong-Hong Kong-Macao Greater Bay Area, and it is also a key construction project in the "13th Five-Year Plan" of Guangdong Province. After the completion of the Yinzhou Lake Expressway, it will fill the gap that there is no north-south expressway on both sides of Yinzhou Lake, drive and support the development of the industrial belt along Yinzhou Lake, and will strongly promote the development of Yinhu Bay Binhai New Area and Guanghai Bay Economic Development Zone, which is of great significance to promote the "integration of production areas" in Jiangmen and build a gateway hub city in the west wing of the Guangdong-Hong Kong-Macao Greater Bay Area and a comprehensive transportation hub in western Zhuhai.