高速公路改扩建拓宽结合部处治方法

针对高速公路改扩建路基拓宽结合部的常见病害，深入分析其病害的成因——差异沉降，从填筑材料的固结本质、材料选取与施工工艺、拓宽结构设计方面探索了差异沉降机理，并提出了相应的处治方法，为公路改扩建工程提供了指导。

Treatment methods on embankment junction for highway width and reconstruction

For the common diseases of embankment junction for highway width and reconstruction, it analyzed deeply its causes of the diseases that is differential settlement. From the aspects of consolidation nature of filling material, material selection, construction process and width structural design, it explored the differential settlement mechanism, and proposed a corresponding treatment methods, provided an important reference for the reconstruction and extension project of highway.