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为了研究纤维改性膨胀土的土水特征,以合肥某工地膨胀土为研究对象进行土水特征曲线(SWCC)试验,研究3种干密度和4种纤维含量对纤维改性膨胀土土水特征的影响。对试验结果按van Genutchen模型进行拟合。结果表明:干密度对纤维改性膨胀土SWCC的影响有明显规律,随着干密度的增大,同一基质吸力对应的饱和度相应增加;纤维含量对纤维改性膨胀土SWCC的影响无明显规律。通过曲线拟合,得到了纤维改性膨胀土SWCC的拟合参数值及其统计量,指出参数n、ws的变异性较小,m的变异性中等,a、wr的变异性最大。
In order to study soil-water characteristics of fiber-modified expansive soils, the soil-water characteristic curves (SWCC) tests of expansive soils in a certain area of Hefei were carried out to study the effects of three kinds of dry densities and four kinds of fiber contents on the characteristics of soil- Impact. The test results were fit by van Genutchen model. The results show that the dry density has an obvious influence on the SWCC of fiber-modified expansive soil. With the increase of dry density, the saturation corresponding to the same substrate suction increases correspondingly. The influence of fiber content on SWCC of fiber-modified expansive soil is not obvious . Through curve fitting, the fitting parameters and statistics of fiber-modified SWCC were obtained. It is pointed out that the variability of parameters n and ws is small, the variability of m is medium, and the variability of a and wr is the largest.