高速公路膨胀土特殊路基设计研究

高速公路对路基的承载性与稳定性具有较高要求,由于我国幅员辽阔,地形复杂多样,越来越多的公路基础设施建设延伸山区,非常容易遇到红黏土、冻土、黄土、盐渍土和膨胀土等特殊路基建设情况。特别是膨胀土会对路基承载性带来不利影响,如果得不到有效处理,易诱发路基沉降、坍塌等病害,因此加强其科学设计显得尤为重要。文章在对膨胀土的分类、判别与工程特性进行分析的基础上,重点对高速公路膨胀土路基设计对策进行探讨。

Expressway has higher requirements for the bearing capacity and stability of subgrade. Because of the vast territory and complex terrain of our country, more and more highway infrastructure construction extends to mountainous areas;therefore, it is very easy to encounter special road infrastructure such as red clay, frozen soil, loess, saline soil and expansive soil. In particular, expansive soil will have a negative impact on the bearing capacity of subgrade. If it is not effectively treated, it is easy to induce subgrade settlement, collapse and other diseases, so it is particularly important to strengthen its scientific design. Based on the analysis of the classification, discrimination and engineering characteristics of expansive soil, this paper mainly discusses the design countermeasures of the subgrade of expansive soil in expressway.