含盐量与颗粒级配对工程土稠度界限的影响

Effect of Salt Content and Grain Gradation on Earth Consistency Limit

按混料均匀设计方法配制不同总盐水平、不同颗粒级配的人工土样,通过界限含水率试验测定土的稠度界限。运用投影寻踪回归分析法(PPR)研究含盐量、颗粒级配对土的稠度界限的影响。发现随着粘粒含量的增加,土的稠度界限有增加的趋势。随着含盐量的增加,土的液限下降较明显,而对塑限影响不大。

In this experiment,the different total salt level,different grain gradation artificial sample were compounded by use of the mixture of average design method to determine earth consistency limit. The influence of salt content and grain gradation on earth consistency limit was investigated by the projection pursuit regression （PPR）. It was found that the earth consistency limit was increased,along with the salt content increase,the earth liquid limit drops obviously,but it did not have influence on the plastic limit.