水泥复合土的渗透性能试验研究

Experiment Study of Penetrative Behaviors on Cement Mixed Soil

为了提高水泥土的工程抗渗特性,本文设计了水泥复合土的配合比,采取正交试验方法,进行了水泥复合土的渗透试验,得到了水泥复合土的渗透系数,并通过极差分析和方差分析,研究了水泥土中的水泥掺量、膨润土掺量和粉煤灰掺量对水泥土抗渗性能的影响,建立了水泥复合土的渗透系数随水泥掺量、膨润土掺量以及粉煤灰掺量变化的回归方程.结果表明:随着水泥掺量、膨润土掺量以及粉煤灰掺量的增加,水泥复合土的渗透系数均逐渐降低;水泥土掺量对水泥复合土渗透系数的影响最大,其次为粉煤灰掺量的影响,膨润土掺量的影响偏小.

The mix proportion of cement mixed soil was designed in order to improve the antipermeability performance in engineering of cemented soil,and the permeability test of cement mixed soil was conducted by orthogonal test method. The permeability coefficient of cement mixed soil was obtained,and the effect of cement content,bentonite content and fly ash content to the anti-permeability performance of cement mixed soil was studied. The regression equation that permeability coefficient of cement mixed soil changing with cement content,bentonite content and fly ash content was established. The results show that permeability coefficient of cement mixed soil decreases gradually when cement content,bentonite content and fly ash content increase. Cement content is the largest on the influence of the permeability coefficient of cement mixed soil,and the fly ash content comes second. Bentonite content is the smaller on the influence of the permeability coefficient of cement mixed soil.