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通过对七种粗粒土料进行室内竖管法毛细水上升高度试验,建立了粗粒土毛细水上升高度与时间的关系曲线,并分析了各曲线变化规律和原因。对毛细水上升高度与时间关系试验曲线用各种函数进行了拟合,发现毛细水上升高度与时间过程在对数坐标下用二次多项式回归方程进行拟合效果最好。对方程参数与土料基本物理指标进行逐步回归分析,最终得出粗粒土毛细水上升高度与孔隙率、干容重、d10、d30、d50有着比较密切的联系,在此基础上建立了粗粒土毛细水上升高度的预测公式。
Through the test of capillary height rising of seven kinds of coarse soil materials by indoor vertical pipe method, the relation curves of capillary rise height and time of coarse grained soil are established, and the variation regularities and causes of each curve are analyzed. The experimental curves of the height of capillary water and time were fitted by various functions. It was found that fitting the quadratic polynomial regression equation with the logarithmic coordinate of capillary water rise height and time course was the best. Through the stepwise regression analysis of the equation parameters and the basic physical indexes of soil material, the conclusion is drawn that the height of coarse water increases with the porosity, dry bulk density, d10, d30 and d50. On this basis, Prediction Formula of Rough Height of Soil Water.