公路悬索桥预防性养护技术

Preventive Maintenance Techniques for Highway Suspension Bridges

对桥梁实施预防性养护技术,可以有效地延长桥梁的使用周期寿命,降低养护成本,促进节约型桥梁建设的快速发展。以湖北沪蓉西高速公路四渡河特大桥为例,介绍了公路悬索桥预防性养护的方法、措施以及常见病害的处治办法。做好桥梁巡查是预防性养护的重要措施之一,对于悬索桥,锚碇、主缆索、吊索、索鞍、加劲梁、桥塔等是日常巡查的重点;采用先进的仪器设备建立桥梁结构的安全与健康监测系统,也是预防性养护的重要措施;养护作业是预防性养护的重要手段,应针对悬索桥锚室、主缆索、吊索、钢桁加劲梁、桥塔等分别进行养护作业,如发现常见病害应采取相应的处治办法。

To implement the preventive maintenance techniques for bridges can effectively prolong the service life cycles of the bridges, reduce the maintenance cost and can promote the rapid development of construction of the cost-saving bridges. In this paper, the Sidu River Bridge on the west section of Shanghai-Chengdu Expressway in Hubei is cited as an example, the meth- ods and measures for the preventive maintenance of highway suspension bridges and the methods for handling of common deteriorations of the bridges are presented. A good tour inspection of the bridges is one of the important measures for the preventive maintenance. For the highway sus- pension bridges, the anchorage, main cables, suspenders, cable saddles, stiffening girders and towers are the important parts that require routine inspection. The creation of the structural safe- ty and health monitoring systems for the bridges, using the advanced instrumentation and equip- ment, is also an important measure. The specific maintenance operation is the important means for the preventive maintenance, the operation should be carried out respectively in accordance with the different parts of the anchorage chambers, main cables, suspenders, stiffening steel truss girders and towers and in case the common deteriorations are found, the corresponding han- dling methods should be timely employed.