电石灰改良盐渍土土水特征试验研究  

Experiment study on soil and water characteristic of the electric lime improved saline soil

作　　者：徐翔宇[1] 

机构地区：[1]沧州市交通运输局,河北沧州061000

出　　处：《内蒙古公路与运输》2012年第3期1-3,共3页Highways & Transportation in Inner Mongolia

摘　　要：测试电石灰改良土的土水特征曲线是电石灰改良土路基潮湿状态分析的关键。采用张力计法测试了不同压实度的电石灰改良土的土水特征曲线,利用非线性最小二乘法反演了van-Genuchten模型中的参数,分析了van-Genucht-en模型拟合电石灰改良土土水特征曲线的效果。结果表明:随着电石灰改良土体积含水率增加,改良土基质吸力逐渐减小;随着压实度的提高,电石灰改良土的体积饱和含水率升高,相同体积含水率的电石灰改良土的基质吸力增大;van-Ge-nuchten模型能很好地拟合电石灰改良土土水特征曲线。研究为电石灰改良土路基的潮湿状态分析提供了试验基础。The soil and water characteristic curve of testing electric lime improved soil is the key to the wet state analysis of electric lime modified soil subgrade. This paper has used tensiometer to test the soil and water characteristic curve of electric lime modified soil of different compactness, inversed the van - Genuchten model parameters with nonlinear least squares, analyzed the effect of van - Genuchten model fitting the soil and water characteristic curve of electric lime improved soil. The results showed that with the increase in electric lime improved soil volumetric moisture content, the matric suction decreased gradually, and with the improvement of the compactness, the volume saturated moisture content increased, the matric suction increased. Van - Genu-chten model can well fitting the soil and water characteristic curve of electric lime improved soil. The research has provided the experimental basis for the analysis of wet state of the electric lime modified subgrade.

关 键 词：盐渍土 底基层 电石灰 粉煤灰 

分 类 号：U414.16[交通运输工程—道路与铁道工程]