水泥潜入河床淤积砂土的减渗效果研究

Study on Infiltration-reducing Effect of Cement Infiltrating into the Riverbed Alluvial Silt

基于淤积砂土室内模拟入渗试验,揭示了水泥潜入河床淤积砂土的减渗效果。结果表明,入渗过程中向水中添加水泥稀浆,不同断面河床淤积砂土都表现出较大的减渗效果;随着河床淤积砂土单位面积上水泥添加量的增加,同一种淤积砂土的减渗作用一定程度增大;随着水泥潜入量的增加,不同质地砂土的减渗效果增大程度不同,但并非添加量越大越好;水泥潜入对河床淤积砂土的减渗效果随着土壤密度的增加而呈现降低的趋势。

The infiltration-reducing effect of cement infiltrating into the riverbed silt was revealed based onthe simulating infiltration tests indoor. The results showed that soil water infiltration capacities in differ-ent sections could be reduced considerably by adding cement slurry to water in the process of infiltration;The infiltration-reducing effects of alluvial silt increased with the increase of adding cement amount per u-nit silt area; The infiltration-reducing effects of different texture soils were different and increased with theincrease of adding cement amount, but more adding cement amount was not better; With the increase ofsoil bulk density, infiltration-reducing effect of alluvial silt tended to decrease.