土石混合介质饱和导水率的研究

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。

Study on Saturated Hydraulic Conductivity of Soil Stone Mixtures

Based on the experiment of the constant head method for saturated hydraulic conductivity,the effects of soil-stone ratios and stone sizes on K_s were studied.Meanwhile,we calculated the K_s with Peck-Watson and Bouwer-Rice equations respectively,then compared the results with the measured data.The results show that: K_s firstly decreases with the increases of the stone contents,and then increases.The relation between them follows binomial function;K_s 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.