rspectives of upgrading infrastructure materials, upgrading bridge Рstructure and adding protectionsubstance, and each kind of reinforcement technology is elaborated from the aspects РРof technical feature, construction process and reinforcement effect. Practice has proved that： the mechanical Рindexes of the bridge are significandy improved after the reinforcement and reconstruction, and the overall bearing Рcapacity of the bridge is significantly improved, which plays a very positive role in improving the traffic capacity.РР Key words Bridge ； Bearing capacity ； Reinforcement and reconstruction ； Reconstruction technology of РРcorrugated pipe for highway ； Reinforcement technology of small 一 span bridge ； Reinforcement technology of glass Рfiber sleeve for bridge pier column
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