考虑变形效应的重塑黄土持水曲线及非饱和渗透系数函数

Water Retention Curve and Unsaturated Hydraulic Conductivity Function of Remolded Loess Considering Deformation Effect

为研究考虑变形效应的重塑黄土持水特性与非饱和渗透特性,以兰州重塑黄土为试验土体,首先测试了不同孔隙比重塑黄土的持水曲线,并用考虑变形效应的持水曲线模型进行拟合;然后测试了浸水饱和试样的饱和体积含水率和饱和渗透系数,获得了孔隙比和饱和体积含水率的关系及孔隙比和饱和渗透系数的关系,进而应用间接法获得了考虑变形效应的非饱和渗透系数函数;最后通过实测某一孔隙比下的持水曲线和非饱和渗透系数曲线,检验了所建立考虑变形效应的持水曲线函数和非饱和渗透系数函数的可靠性。结果表明,考虑变形效应的持水曲线和非饱和渗透系数函数具有较好的可靠性。

In order to study the water retention curve and unsaturated hydraulic conductivity function of remolded loess considering deformation effect, Lanzhou remolded loess was taken as tested soil in this paper. Firstly, the water retention curve of remolded loess with different void ratios were tested and fitted using the water retention curve model considering deformation effect. Then, the saturated volumetric water content and saturated hydraulic conductivity of saturated samples with different voids were measured. The relationship between void ratio and saturated volumetric water content and the relationship between void ratio and saturated hydraulic conductivity were obtained. The unsaturated hydraulic conductivity function was indirectly determined considering deformation effect. Finally, the reliability of the established water retention curve function and unsaturated hydraulic conductivity function considering deformation effect was verified by actual measurement. The results show that the water retention curve function and unsaturated hydraulic conductivity function considering deformation effect are reliable.