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在山西农业大学水土保持设计研究所,利用室内模拟试验研究3种密度(0.9、1.0、1.1 g/cm3)及3种掺土比例(1.0∶0.5、1.0∶1.0、1.0∶2.0)下粉煤灰的入渗规律。结果表明:1)随着密度的增大,粉煤灰的入渗速率迅速减小,且呈幂函数关系;2)粉煤灰掺入一定比例土可以增加其干密度或表层的致密性,并可有效减小其入渗强度,改善纯粉煤灰不易压实的特性;3)2种介质掺混时,入渗能力取决于中值粒径的大小,中值粒径大,入渗能力则强;4)在纯粉煤灰情况下,其入渗过程用通用经验公式表达较为理想,在掺土情况下,用通用经验公式和考氏模型与实测数据的拟合度均较好,但在小密度情况下,实测数据与模型的拟合曲线在入渗渐变阶段有较小的偏离。研究结果可为有效降低储灰场扬尘污染、减小灰场降水入渗和预测灰场产流等提供理论基础。
In the laboratory of soil and water conservation design of Shanxi Agricultural University, three kinds of density (0.9,1.0,1.1 g / cm3) and three types of mixed soil (1.0: 0.5, 1.0:1.0, 1.0: 2.0) Gray infiltration law. The results show that: 1) As the density increases, the infiltration rate of fly ash decreases rapidly and shows a power function relationship; 2) The fly ash can increase the dry density or surface compaction when it is mixed with a certain proportion of soil, And can effectively reduce the infiltration strength and improve the characteristics of pure fly ash is not easy to compaction; 3) When the two media are blended, the infiltration capacity depends on the size of the median particle size, median particle size, infiltration The ability is strong; 4) In the case of pure fly ash, the infiltration process is expressed by the general empirical formula is ideal, in the case of mixed soil, the general empirical formula and the test model and the measured data fitted better , But in the case of small density, the fitted curve of the measured data and the model has a small deviation in the gradual change of infiltration. The results can provide theoretical basis for effectively reducing the dust pollution in the ash storage yard, reducing the rainfall infiltration in the ash yard and predicting the ash farm runoff.