不同初始孔隙比土体进气值及土–水特征曲线预测

Prediction of air-entry value and soil-water characteristic curve of soils with different initial void ratios

建立不同初始孔隙比条件下土–水特征曲线预测方法是进行非饱和土水–力耦合研究的基础,因而具有重要的研究意义。为此,以分形理论为基础建立了不同初始孔隙比下进气值预测方法,分析了不同初始孔隙比条件下分维数近似不变的规律,在此基础之上,利用土–水特征曲线分形模型给出了不同初始孔隙条件的土–水特征曲线预测方法,试验结果表明提出的预测方法较为合理。

The prediction method for soil-water characteristic curve under different initial void ratios is the foundation of the study on hydro-mechanical coupling of unsaturated soils, so it is of important research significance. For this purpose, the prediction method for air-entry value of soils with different initial void ratios is established based on the fractal theory. The fractal dimension of different initial void ratios is studied and discovered to be approximately the same rule. On this basis, the prediction method for soil-water characteristic curve of soils with different initial ratios is established by using the fractal model. The experimental results show that the proposed prediction method is reasonable.