本文主要对新旧路基拓宽工程的方式及工程技术问题、不协调变形的特点和计算方法以及对路面结构的影响、拓宽路基的设计理论和方法、新旧路基结合部处治的原理、方法和施工技术进行了分析。 This paper mainly discusses the ways and engineering problems of the new and old roadbed to broaden the project, the characteristics and calculation methods of the uncoordinated deformation and the influence on the pavement structure, broadens the design theory and method of the subgrade, the principle, method and construction technique of the old and the new subgrade combination treatment Analysis.