原状黄土土水特征曲线预测方法研究

Estimation of soil-water characteristic curve for undisturbed loess soil

为了探究原状黄土的土水特征,采用Soilvision软件对宝鸡、岐山和杨凌3个地区的原状黄土的土水特征曲线(soil-water characteristic curve,SWCC)进行了预测研究,并和室内压力板减湿试验结果进行了对比。结果表明:Arya&Pais、Scheinost和Tyler&Wheatcraft 3种方法并不适合预测原状非饱和黄土的土水特征曲线;Fredlund and Wilson方法基于庞大的土工试验数据库,适合预测原状非饱和黄土的土水特征曲线。最后,建议了一种可以在无试验条件时预测土水特征曲线的工程实用预测公式。

In order to explore the characteristics of intact loess soil water,the soil-water characteristic curve（SWCC）for undisturbed loess from Baoji,Qishan and Yangling were predicted by Soilvision software,which was compared with results from the pressure plate and reduce indoor humidity test.The results showed that methods like Arya Pais,Scheinost and Tyler Wheatcraft were not suitable for prediction of undisturbed unsaturated of SWCC.Since Fredlund Wilson method was based on a huge database of soil test,it was determined to be suitable for the prediction of undisturbed unsaturated of SWCC.A new practical engineering approach was proposed to predict the SWCC prediction formula in the absence of test conditions.