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在模拟土柱中,利用圆盘入渗仪对碎石对土壤饱和水力传导度的影响进行了分析。结果表明含碎石土壤饱和水力传导度可以通过对不同负压下土壤稳定入渗速率进行非线性回归获得。含碎石土壤饱和水力传导度与去除碎石后的土壤饱和水力传导度及碎石形状指数密切相关。试验中含碎石土壤的饱和水力传导度随碎石含量的增加而呈指数降低趋势。
In the simulated soil column, the influence of gravel on saturated hydraulic conductivity of soil was analyzed by disc infiltrometer. The results show that saturated hydraulic conductivity of soil with gravel can be obtained by nonlinear regression of steady infiltration rate of soil under different negative pressures. Saturated hydraulic conductivity of gravelly soils is closely related to soil saturated hydraulic conductivity and gravel index after gravel removal. In the experiment, saturated hydraulic conductivity of crushed gravel soil decreased exponentially with the increase of crushed stone content.