桥面铺装层是提高桥梁结构耐久性的重要结构,由于桥面铺装设计理论的不完善及施工工艺的不足,使桥面铺装常出现一些病害问题。本文从分析总结现有病害入手,在南水北调中线工程跨渠桥梁设计中,结合工程特点,改进桥面铺装层设计,提高结构的耐久性。 Deck pavement is an important structure to improve the durability of the bridge structure. Due to the imperfect theoretical design of bridge deck pavement and the lack of construction technology, some defacement problems often occur in the deck pavement. In this paper, starting from the analysis and summarization of the existing diseases, in the design of the Diversion Canal Bridge of the Middle Route of South-to-North Water Diversion Project, the design of deck pavement is improved to improve the durability of the structure.