湖南某高速公路膨胀土变形特征相关性试验研究

A Study on Deformation Characteristic Relativity of Expansive Soils of a Certain Expressway in Hunan Province

通过室内大量膨胀土试验 ,对湖南某高速公路 3种膨胀土击实土样的变形特征相关性进行了研究。研究结果表明 :对于同一种膨胀土 ,其膨胀力和膨胀量的大小主要取决于土的含水量和干密度 ;根据试验数据进行半对数线性回归分析 ,线性相关显著 ;同时对膨胀土的变形机理进行了探讨。研究结果为膨胀土路堤的设计及膨胀土地基处理提供了重要依据。

By a lot of tests on the expansive soil in the laboratory, the deformation characteristic relativity of three kinds of compacted expansive soils of a certain expressway in a Hunan Province is researched The study results indicated: for the same kind of expansive soil, the magnitude of its expansibility and swelling quantity is mainly determined by its water content and dry density; according to the test data, half logarithm linear regressions are done and the linear regressive relativity are very remarkable The deformation cause of expansive soil is discussed too in this paper Therefore, the investigation provided the important basis for the design of embankment and treatment technique to the existing expansive soil foundations