Soil filters that are commonly used to stabilize base soils in infrastructures are gradually prone to microparticle accumulation. Sequestration and accumulation of suspended solid particles in fluid on the media surfaces of the filter lead to porosity and permeability reduction through the porous medium and cause physical clogging. This reduces hydraulic conductivity and eventually filters drainage capacity. This study evaluated the reduction in hydraulic conductivity and porosity of a soil filter with sand bed (average diameter 3.55 mm) affected by suspended particles in the fluid of silica and with the average sizes of 4, 20 and 40 microns with a concentration 1 g/L. Results show input suspended particle size has been effective on the reduction rate of the hydraulic conductivity and larger microsilica particles reduce hydraulic conductivity and porosity particularly in early days of filtration more rapidly. For the 4, 20 and 40-micron microparticles, the pressure drop is stabilized after 14, 10 and 7 days, respectively. The average stabilized values are 540, 1460 and 1200 Pascal, respectively. Pressure drop increase during the operation of the soil filter shows that hydraulic conductivity and porosity in porous media is reduced under different circumstances of input microsilica particle size.

通常用于稳定基础设施中基础土壤的土壤过滤器逐渐倾向于微粒堆积。悬浮固体颗粒在过滤器介质表面上的固存和积聚导致多孔介质中孔隙率和渗透率降低，并导致物理堵塞。这降低了水力传导性并最终过滤了排水能力。这项研究评估了含沙床（平均直径3.55毫米）的土壤过滤器的水力传导率和孔隙率的降低，该沙床受到二氧化硅流体中悬浮颗粒的影响，平均尺寸为4、20和40微米，浓度为1 g / L. 结果表明，输入的悬浮颗粒尺寸对降低水力传导率有效，而较大的微二氧化硅颗粒降低水力传导率和孔隙率，尤其是在过滤初期。对于4、20和40微米的微粒，压降分别在14、10和7天后稳定下来。平均稳定值分别为540、1460和1200 Pascal。在土壤滤池运行过程中，压降的增加表明，在输入的微硅粒径不同的情况下，多孔介质中的水力传导率和孔隙率会降低。分别为1460和1200 Pascal。在土壤滤池运行过程中，压降的增加表明，在输入的微硅粒径不同的情况下，多孔介质中的水力传导率和孔隙率会降低。分别为1460和1200 Pascal。在土壤滤池运行过程中，压降的增加表明，在输入的微硅粒径不同的情况下，多孔介质中的水力传导率和孔隙率会降低。