On April 23, at the construction site of the Wufengshan Yangtze River Bridge, four large wire winding machines held the main cable tightly while "moving". With the rotation of the gear, the silver-white "silk thread" was wrapped around the diameter in a circle The 1.3-meter main cable marks that the Wufengshan Yangtze River Bridge has entered the anticorrosion construction phase of the main cable.
The anti-corrosion system of the main cable of Wufengshan Yangtze River Bridge adopts "S" shaped steel wire winding, Anti-Corrosion Elastomeric Cable Wrap System, and air dehumidification three-process composite protection system. As a new technology for the main cable protection of suspension bridges, "S" shaped steel wire is used as the main wire winding wire, which can be pressed together with each other after winding. The sealing effect is excellent, which effectively blocks the intrusion of rainwater and mist condensation water, and slows the medium to the main cable. Corrosion of the main cable extends the service life of the main cable. After the S-shaped wire is wound, the surface is melted and shrunk with a layer of high-performance composite wrapping tape for sealing. At the same time, an active dehumidification system is established inside the main cable to deliver dry air to the inside , To remove the moisture that penetrates inside the main cable, reduce the moisture content of the main cable, and extend the service life of the main cable. At the same time, the combination of "S" shaped steel wire winding and surface coating can form an airtight protective layer outside the main cable, so that the main cable dehumidification system is basically guaranteed.
The main cable of the Wufengshan Yangtze River Bridge is wound with 3mm high "S" low carbon steel wire. The wire is wound in the order of the middle span and then the side span. The total steel wire consumption of the bridge is about 362.4 tons. It will take about a month for the main cable of Wufengshan Yangtze River Bridge to "wear on protective clothing"!