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通过对灾区公路桥梁的调查发现,桥梁防震挡块出现了不同程度的病害,并导致上部结构位移过大甚至发生落梁事件,因此需对桥梁采取梁体复位等措施加以修复。另外,还对防震挡块病害的主要原因和作用进行了分析,从设计、施工、检测等方面进行了思考,并针对设计时应考虑不同类型挡块的合理运用、挡块钢筋构造设计、抗震强度检算和增设纵横向防落梁装置,施工时的工艺、养护措施,加强试验检测的内容和重要性等方面提出了建议,可为防止今后在地震中再次出现类似的病害或落梁事故提供借鉴。
Through the investigation of the bridges and bridges in the disaster areas, it is found that the bridge anti-vibration stops have different degrees of disease and lead to the excessive displacement of the superstructure and even the falling-off event. Therefore, the bridges need to be rehabilitated by measures such as beam reduction. In addition, the main causes and effects of the anti-shock block disease are analyzed, and the design, construction and testing are considered. In the design, the rational use of different types of block should be considered. The design of the block reinforced structure, Strength checking and addition of vertical and horizontal anti-shedding device, construction process, conservation measures, to strengthen the content and importance of test testing and other aspects of the proposal, in order to prevent the recurrence of similar earthquakes in the future or fall accident Provide reference.