采用室内浸泡方法,研究污染土的液、塑限以及塑性指数随酸碱度值的变化规律。用不同酸碱度值的盐酸和氢氧化钠溶液浸泡土样,测定浸泡前、后土样的液、塑限值,总结其变化规律。试验表明:随着酸碱度值的增大,液限和塑性指数逐渐增大而塑限呈现两端大中间小;在酸碱度值一定的情况下,随着浸泡时间的增长,土样有液限值逐渐减小、塑限值逐渐增大的趋势。最后,对上述变化的原因进行分析。 Indoor immersion method was used to study the law of liquid, plastic limit and plasticity index of polluted soil with pH value changes. Soil samples were immersed in hydrochloric acid and sodium hydroxide solutions with different pH values. The liquid and plastic limits of soil samples before and after soaking were measured, and the variation rules were summarized. The results show that with the increase of pH value, the liquid and plastic index increase gradually and the plasticity limit appears at both ends of the middle and small. Under certain pH value, with the increase of immersion time, the liquid limit Gradually reduce the plastic limit gradually increasing trend. Finally, the reasons for the above changes are analyzed.