新增拱肋法在既有刚架拱桥加固中的应用

Application of adding arch rib method in reinforcement of existing rigid frame arch bridge

以广东省国道G321上某座既有刚架拱桥为背景,针对该旧桥的典型病害,采取横向新增5片拱肋、重新整体现浇桥面板和桥面铺装等措施对桥梁进行加固。实践表明:制定的该桥加固方案能够提高桥梁承载能力并确保施工安全可靠,为同类型既有刚架拱桥的加固维修提供参考。

In this paper, an existing rigid frame arch bridge on the national highway G321 in Guangdong Province is used as the test object. In view of the typical diseases of these old bridges, we took 5 new arch ribs transversely, and then repoured and paved the bridge deck for the purpose of reinforcement. The practice shows that, the reinforcement scheme can improve the bridge bearing capacity and make sure that the construction will be safe and reliable. It can provide reference for the reinforcement and maintenance of the existing rigid frame arch bridge of the same type.