黄土土水特征曲线试验研究

Study on soil-water characteristic curves of loess

论文基于试验研究了兰州附近地区原状黄土和重塑黄土的土水特征曲线。研究发现,原状黄土和重塑黄土的土水特征曲线与Williams模型比较接近。研究数据的拟合表明,体积含水量和基质吸力之间存在对数函数关系。但是,相对与原状黄土,重塑黄土因不存在结构性影响,数据离散性更小,规律更显著。并且利用不同干密度的重塑试样进行了干密度对黄土土水特征曲线影响的研究,结果表明基质吸力随干密度的增加线性增长。

In this paper, soil-water characteristic curve （SWCC） of undisturbed and remolded loess near Lanzhou is studied based on laboratory test. The study shows that SWCC of both undisturbed and remolded loess follows Williams Model. The data fitting shows that there is a logarithm relation between volume water content and matrix suction. But compared with that of undisturbed loess, SWCC data of remolded loess is more concentrated to show a regular pattern. Using remolded loess with different dry density, the study also shows that matrix suction increases with that of dry density following a liner relation.