碱液对桂林红黏土物理力学性质的影响研究

Study on Influence of Alkali Liquor on Physical and Mechanical Property of Red Clay in Guilin

红黏土属于特殊性土,由于其特殊的成因过程和成因环境,工程性质与黏土有很大的区别。选取桂林雁山区红黏土,以氢氧化钠作为碱类污染物,通过相对密度试验、界限含水率试验、直剪试验、压缩试验,研究红黏土受到不同浓度氢氧化钠溶液污染后,对物理力学特性的影响。结果表明:受污染红黏土,随碱浓度的增加,其比重增大,液限、塑限均增大,抗剪强度减小,压缩系数增大,压缩模量减小。

Due to special formation process and environment,red clay belongs to peculiar soil with different engineering characteristics and clay.To seek the changes of red clay characteristics under different dosage Alkaline Pollutants,selecting the red clay in Yanshan District,Guilin,Sodium Hydroxide as the Alkaline Pollutants,based on the relalive density test,water ratio limit test,direct shear test and compression test,the influence of sodium hydroxide solution with different concentration on the impact of physical and mechanical properties of red clay is studied.The results show that with the increase of alkali concentration,the proportion of polluted red clay increased,the liquid limit and plastic limit increased,the shear strength decreased,the compression coefficient increased and the compression modulus decreased.