The Guangzhou-Foshan-Zhaoqing Expressway-Beijiang Super Bridge built by the China Railway Bridge Bureau will be fully connected, and the Greater Bay Area will add another major traffic artery.
The Beijiang Bridge is a control project of the Guangfo-Zhaoqing Expressway. It is located at the junction of Sanshui District of Foshan City and Dawang District of Zhaoqing City, connecting the two places across the Beijiang River. The bridge is a continuous rigid frame bridge with a main span of 215 meters, 6 lanes in both directions, and a design speed of 100 kilometers per hour. The site of the bridge is extremely complex in geology, with karst caves underneath, and the construction of a 215-meter long-span continuous rigid frame is difficult.
The riverbed of Beijiang Bridge is shallow, and the steel pipe piles of the trestle bridge are difficult to take root and are unstable. The project department added two more piles on the basis of the original two piles, and connected them into a whole to form a "bench structure" for the trestle bridge. The bridge area has complex geology and strong karst development. The project department adopted various methods such as follow-up of the casing, throwing and filling schist loess, filling with low-grade plain concrete, etc. to ensure the construction quality.
How to carry out continuous rigid frame construction with a large span of 215 meters? The project department embeds monitoring components such as stress and deformation in the main beams to conduct health examinations and monitoring of bridge construction. In the process of continuous rigid frame suspension casting construction, the elevation is monitored and adjusted in real time. And carry out the research and application of the main beam C60 low shrinkage low creep high strength concrete to ensure the construction quality of the main bridge.
In addition, in order to ensure construction safety, quality and improve construction efficiency, the builders of the Bridge Bureau used "steel sheet pile cofferdams with grouting platforms" and "steel sheet pile cofferdams with low pile caps without covering layers" in the construction process. Prefabricated bridge facing edge protection system" and other technologies. Up to now, 2 construction methods and 7 patents have been declared.
Guangzhou-Foshan-Zhaoqing Expressway is an expressway connecting Guangzhou, Foshan and Zhaoqing. It is also another expressway connecting Guangzhou, Foshan and other core areas of the Pearl River Delta with Guangxi and other large southwestern regions. After completion, it will become the main artery in central Guangdong and the main channel out of the province in the west.
