悬索桥主缆钢丝腐蚀是一个世界性的难题。承担荷载的主缆被缠包钢丝覆盖保护,主缆钢丝腐蚀被隐藏在内部,在发现腐蚀时主缆腐蚀往往发展到比较严重的程度。许多实例表明传统的主缆防护体系不能完全防止腐蚀,仅仅是延缓腐蚀的速度。因此不得不开发和应用主缆除湿系统,除湿系统将干燥空气输入密封主缆,并保持主缆内部干燥,使腐蚀环境不能发生。详细介绍主缆除湿概念、除湿系统设计要点、全寿命周期成本分析和应用经验。 Suspension bridge main cable wire corrosion is a worldwide problem. The load-bearing main cable is covered and covered by the wrapped wire, and the corrosion of the main cable is hidden inside. Corrosion of the main cable is often developed to a more serious degree when corrosion is found. Many examples show that the traditional main cable protection system can not completely prevent corrosion, just slow down the rate of corrosion. Therefore, the main cable dehumidification system has to be developed and applied. The dehumidification system inputs the dry air into the main sealing cable and keeps the main cable dry inside so that the corrosive environment can not occur. Described in detail the main cable dehumidification concept, dehumidification system design points, full life cycle cost analysis and application experience.