砂土渗透系数的粗粒效应

Coarse Particle Effects of Permeability Coefficient of Sand

利用常规渗透仪进行了不同粗粒含量砂土的渗透性能试验,探讨砂土渗透系数的粗粒效应。发现砂土渗透系数总体上随粗粒含量增加而减小,但当粗粒含量增加到某一值后,渗透系数随粗粒含量增加而增加;掺入的粗粒与原砂样粒径相差越大,对渗透系数的影响越大,粗粒效应越明显。

The permeability test with different coarse grain content of sand is performed by conventional permeameter, and the coarse particle effects on permeability coefficient of sand are discussed. It is found that the permeability coefficient of sand decreases with the increase of the fines on the whole. While when the coarse grain content increases to a certain value, the permeability coefficient increases with the increase of the coarse grain content. The larger the difference of incorporation of coarse grain and raw sand particle size, the bigger effect on the permeability coefficient, the more obvious coarse particle effects.