公路桥梁竣工并交付使用后,在行车作用和自然因素的影响下,特别是在交通量和轴载不断增加的情况下,有些筑路材料性质发生衰变,加上设计、施工中遗留的某些缺陷,导致公路桥梁的使用性能逐渐下降。城市桥梁也越来越不堪重荷,出现了许多的病害。为了延长桥梁的使用安全和使用年限,保障城市交通运输的正常运行,城市桥梁的养护和维修变得越来越重要。 After completion and delivery of highway bridges and bridges, under the influence of traffic and natural factors, especially in the case of increasing traffic volumes and axle loads, the nature of some road materials decays, together with some of the leftovers in design and construction Defects, leading to the use of highway bridge performance gradually declined. Urban bridges are also more and more overburdened, there have been many diseases. In order to extend the safe use of the bridge and the service life, to ensure the normal operation of urban transport, the maintenance and repair of urban bridges become more and more important.