南水北调中线工程膨胀土初步判定试验研究

Test Study of Preliminary Determination of the South-to-North Water Diversion Project Expansive Soil

膨胀土作为一种特殊土,其胀缩特性所带来的危害受到工程界普遍关注。自由膨胀率是反映粘性土的膨胀性的指标之一,对初步判定膨胀土有较大参考价值。该文主要以南水北调中线一期工程总干渠河北邯郸段所取膨胀土样为例,通过室内试验,得到了膨胀土自由膨胀率,从而为膨胀土的初步判定提供依据。

The expansive soil as a kind of special soils, the harm of the characteristics of the bilge shrink received univer- sal attention in the engineering. Freedom expansion rate is a reflection of the clayey soil dilatability, it is helpful for the preliminary determination of expansive soil. In this paper, taken the expansive soil samples as example, which is in the project of South-to-North Water Transfer Project main channel Handan section, through the laboratory test, obtaining the expansive soil free expansion ratio, so as to provide preliminary basis for judging expansive soil.