Abstract: Aimed at the Dawang Bridge，this paper first introduces the reasons for the disease probloms simply，then mainly discusses the maintenance and reinforcement measures for some key positions such as arch rib，spandrel hanger，straining beam of arch crown，transbeam of hanger，corbel of main arch，rigid-frame arch of bridge approch，microcurved slab and floor decking．What's more，the key construction processes of crack grouting and sealing，steel an choraging，carbon cloth bonding， steel plate bonding，epoxy resin chemical grouting and steel encapsulation by wet type and the surface of concrete mending are discussed．

Key words: maintenan ce, reinforcement, meas ures, process

摘要： 简要介绍了大旺大桥病害产生的原因，重点论述了该桥主桥拱肋、吊杆、拱顶横系梁、吊杆横梁、主拱牛腿、引 桥刚架拱、全桥微弯板、桥面系等关键部位的维修加固措施，以及裂缝灌浆与封闭、锚筋、黏贴碳纤维布、黏贴钢板、 环氧树脂化学灌浆湿式外包钢法、修补砼表面等主要维修加固工艺施工要点．

关键词: 维修, 加固, 措施, 工艺