The construction cost of the Second Wujiang Bridge in Fuling is 360 million yuan. Construction started in June 2004 and was completed and opened to traffic on September 25, 2009. It consists of main bridge, spiral ramp and approach road engineering. Cable-stayed bridge adopts 100 m +340 m+150 m twin towers and single cable plane tower beam for consolidation. Main bridge 106 section, including 66 high towers and 40 low towers. The number of segments on both sides of the tower is symmetrical, but the length of the segments is asymmetrical. * * * There are 6 meters, 4.4 meters and 4. Main construction method: The foundation of the main tower of Wujiang Second Bridge is about 8m deep, and the water depth exceeds 10m, so the construction is very difficult. Through scientific and technological research, the project department finally chose earth-rock island cofferdam for foundation construction after comparing the schemes of double-wall steel cofferdam and steel sheet pile. Practice has proved that the island cofferdam construction of the Second Wujiang River Bridge has achieved good results, effectively overcoming the complex hydrogeological conditions such as river scouring, weak silt bearing capacity and easy water seepage, laying a foundation for the smooth flood-crossing of the foundation construction of the Second Wujiang River Bridge and providing a guarantee for the subsequent construction of the Second Wujiang River Bridge. For a cable-stayed bridge with single cable plane, the use of front fulcrum hanging basket may make the design of hanging basket extremely complicated and the operation very complicated, thus reducing the economy and applicability of hanging basket. In addition, because the main girder of single cable plane cable-stayed bridge is a box opening, the design thickness of box girder bottom plate has to be increased due to the huge reaction generated by the front fulcrum hanging basket thrust device, which will further increase the project cost. Based on this, in order to ensure the construction safety, the cantilever pouring of the main girder is carried out by using the hanging basket with rear fulcrum. In the design of the hanging basket, the inconsistent segment length of the cantilever end of the beam yoke, the structural form of the box girder, the maximum segment concrete weight and the rigidity of the hanging basket are comprehensively considered. The hanging basket of steel box girder is the most important thing in the construction of hanging basket at the back fulcrum of bridge. In the detailed design, the structural form should be optimized as much as possible to control the weight of the hanging basket. The ratio of the hanging basket weight to the maximum segmental concrete weight is 0.35, which effectively saves the construction cost. Wujiang Second Bridge is an asymmetric cable-stayed bridge with single cable plane. In the process of cantilever construction, the natural vibration frequencies at both ends of the cantilever are different. In order to avoid the unstable factors caused by wind and unbalanced load on the bridge structure, temporary anti-vibration measures are set at the distance of 100 meters from the tower side span. The temporary pier is made of steel pipe piles with a design bearing capacity of 5000KN, and the pier top is provided with bearings to limit the horizontal and vertical displacement of the beam. Long stay cables are hung on the same plane, and the whole bridge 106 cables are protected by 7 high-strength galvanized parallel steel wire bundles (1670 grade), and LZM7 series cold-cast pier head anchors are adopted, with the tensioning end on the beam and the anchoring end in the tower. The longest cable length is 230.66m m. As a general cable-stayed bridge needs a single cable to bear the tension of two cables, the heaviest cable is H33', the maximum tension of stay cables is H33', and the balance cable force of the completed bridge is 83 13KN, so it is difficult to hang and pull the cables. The construction of the Second Wujiang Bridge embodies the scientific and technological essence of a company. The company organized a scientific and technological research team to conduct scientific and technological research and innovation. According to the difficulties and key points of the project, corresponding measures are formulated to tackle key technical problems. * * * Published 12 QC results, published 6 scientific papers and applied for 3 patents, which is another brilliant chapter in the history of bridge construction of a company! [ 1]