根据旧路改建工程设计经验，提出了旧路改建模式的主要类型，并结合国道G205线蕉岭段改建工程设计实例，从路线、路基、路面、桥涵等方面入手，分析了旧路改扩建设计的思路、原则和方法，以供参考。%According to the design experience of old road reconstruction engineering,this paper proposed the main types of old road reconstruc-tion mode,and combining with the reconstruction engineering design examples of Jiaoling section of national highway G205 line,from route, roadbed,bridges and culverts and other aspects,analyzed the design principle and method of old road reconstruction,for reference.
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