寒冷地区公路桥梁混凝土结构耐久性提升关键技术研究

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中图分类号：U442.5 文献标识码：A 文章编号：1672-3791（2026）04-0158-03

Research on Key Technologies for Improving the Durability of Highway Bridge Concrete Structures in Cold Regions

ZHANG Mingxi

Rangtang County Transportation Bureau， Ganzi Prefecture， Sichuan Province， 6243Oo China Abstract： The climate conditions in cold regions are harsh，and bridge concrete structures are exposed to freezethaw cycles，chloride erosionand severe temperature diffrence loads foralong time，whichcan easilylead to pore expansion，cracking and peeling，and steel corrosion，and other phenomena，seriously affcting the durabilityand operationalsafetyof thestructure.Tothis end，keytechnologyresearchonimprovingthedurabilityofconcrete structuresforhighway bridges incoldregions iscarriedoutaroundmaterial density design，protectioncoordination mechanism，and monitoring and maintenance integration.The aim is toachieve long-term stable operation of concrete structures under extreme climate conditions and improve the service abilityand engineering adaptability of the whole life cycle of bridges.

Keywords： Cold region; Concrete structure; Durability; Freezing-thaw cycle; Chloride erosion

寒冷地区，气候环境复杂严酷，桥梁混凝土结构长期承受频繁冻融作用、高浓度氯盐侵蚀与大幅度温度梯度变化，易导致表层裂缝发展、孔隙率上升、钢筋腐蚀扩展等退化现象持续叠加，结构工作性能明显削弱，耐久性衰减过程呈现快速化与不可逆趋势。（剩余4100字）