土石混合介质饱和导水率的研究

Study on Saturated Hydraulic Conductivity of Soil Stone Mixtures

采用恒定水头法对土石混合介质的饱和导水率进行测定，分析不同碎石含量及碎石直径对饱和导水率的影响，同时利用实测值对Peck—Watson及Bouwer—Rice两个传统估算方程的估测精度进行比较。结果表明：（1）饱和导水率随碎石含量先增大后减小，且两者呈二项式关系；（2）饱和导水率随碎石直径增大而减小，两者呈幂函数关系；（3）碎石直径介于1．0～5．0cm时，Bouwer—Rice和Peck—Watson方程对饱和导水率的估算结果均大于实测值。

Based on the experiment of the constant head method for saturated hydraulic conctuctivity, the effects of soil-stone ratios and stone sizes on Ks were studied. Meanwhile, we calculated the Ks with Peck -Watson and Bouwer-Rice equations respectively, then compared the results with the measured data. The results show that： Ks firstly decreases with the increases of the stone contents, and then increases. The relation between them follows binomial function; K, decreases with the increases of the mean diameters of the stones; the relation between them follows index function. The values calculated by the equation of Peck-Watson and Bouwer-Rice are much greater than measured data when the stone sizes are between 1.0-5.0 cm.