粉煤灰不同掺土比例下入渗模拟试验  

Infiltration experiment of coal-ash mixed with earth

作　　者：胡振华[1] 王君[1] 李长生[1] 

机构地区：[1]山西农业大学林学院,山西太谷030801

出　　处：《中国水土保持科学》2010年第2期52-58,共7页Science of Soil and Water Conservation

基　　金：山西省青年科技基金"雁北樟子松生态需水及治理模式研究"(20031048);山西农业大学科技创新基金"工矿区废弃物有效利用及治理研究"(200213)

摘　　要：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。The experiment was done at the soil and water conservation institute of Shanxi agricultural university dealing with the coal-ash infiltration laws of three kinds of density （0.9,1.0,1.1 g/cm^3 ） and three kinds of mixed ratio （ 1.0：0.5,1.0 ： 1.0,1.0 ： 2.0 ）. The results showed that ： 1 ） with the density increasing, the infiltration rate of coal-ash deceased, and the relationship between density and infiltration rate is a power function;2） the density and surface solidity of the coal-ash increased as the coal-ash mixed with the earth,and its infiltration rate deceased; 3） the infiltration rate of two mixed materials is mainly dependent on the medium value diameter, if it＇s bigger, the rate is also bigger;4） the infiltration process can be expressed by universal empirical formula with the pure coal-ash, and expressed by the universal empirical formula and Kostiakov formula with the mixed coal-ash. But there are small offsets between the experimental and simulated curves with the small density in the secondary phase of infiltration process. The research is importance in reducing dust pollution, decreasing infiltration and predicting runoff amount in the coal-ash storage place.

关 键 词：粉煤灰 掺土比例 密度 入渗速率 

分 类 号：S275[农业科学—农业水土工程]