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通过对12种不同粗细土料进行室内竖管法毛细水上升高度试验,得到毛细水上升高度与时间关系曲线,并分析了影响因素和变化规律。粗粒土毛细水上升高度与时间过程可用对数坐标下二次多项式回归方程进行模拟和预测,方程参量与反映土的颗粒组成和装填密实程度大小的物理指标密切相关。给出了各种粗细粒土毛细水上升稳定高度数据。对粗粒土建立了毛细水上升最大高度与其物理指标(有效粒径d10和孔隙率n)间的实用回归方程式。还将试验数据与以往常用的估计粗粒土毛细上升最大高度的海森等公式进行了对比,指出后者之缺陷和不足。
Through the test of capillary height rising of indoor vertical tube method for 12 kinds of soil with different thickness, the curve of rising height of capillary water with time is obtained, and the influencing factors and variation rules are analyzed. Coarse-grained capillary water rise height and time course can logarithmic coordinates of the second-order polynomial regression equation to simulate and predict the equation parameters and reflect the soil particle size and density of the degree of density of the physical indicators are closely related. A variety of coarse and fine grained soil capillary water height stability data. A practical regression equation was established for the coarse-grained soil between the maximum height of capillary water rise and its physical indices (effective particle size d10 and porosity n). The experimental data are also compared with those of Hessian, which used to estimate the maximum height of capillary rise of coarse-grained soil, and the shortcomings and deficiencies of the latter are pointed out.