论文部分内容阅读
通过宁明膨胀土的液塑限试验以及采用泥浆制样法的固结慢剪试验,分析了不同浓度的NaCl溶液对宁明膨胀土强度指标的影响。结果表明:随着NaCl溶液浓度的增加,粘聚力与内摩擦角均呈现下降的趋势;液限与塑性指数也随着NaCl溶液浓度的增加而降低。说明NaCl溶液浓度对宁明膨胀土的强度指标均有不同程度的影响,不同浓度的NaCl溶液导致了粘土颗粒间的相互作用力和双电层的变化,从而影响着其强度指标。
Through the liquid-plastic limit test of Ningming expansive soil and the consolidation slow shear test using mud sample preparation method, the influence of NaCl solution with different concentrations on the strength index of expansive soil in Ningming was analyzed. The results show that with the increase of NaCl concentration, the cohesion and internal friction angle all show a decreasing trend. The liquid limit and plasticity index also decrease with the increase of NaCl concentration. The results show that the concentration of NaCl solution affects the strength of Ningming expansive soil in varying degrees. Different concentrations of NaCl solution lead to the interaction between clay particles and the change of electric double layer, which affects the strength index.