论文部分内容阅读
冻结温度是判别土体是否处于冻结状态的指标,在人工冻结和数值模拟计算中影响冻结壁的厚度和计算精度.通过采用不同土体添加不同的盐分,对不同含水量和含盐量土体进行盐渍土的冻结温度试验,考虑了不同因素对土体冻结温度的影响.实验表明:不论何种土含有何种离子,土体的冻结温度随含盐量的增加而降低,随含水量的增加而增大;土中易溶盐的含量对冻结温度具有控制作用;土中常见阴阳离子对冻结温度的影响分别为:Cl->CO23->SO24-,K+>Na+>Ca2+.同一含水量含盐量下,土粒粒径越小其冻结温度越低;随着含水量的增加,粒径之间对冻结温度影响的差异降低.
The freezing temperature is an index to judge whether the soil is in a frozen state, and affects the thickness and calculation accuracy of the frozen wall in artificial freezing and numerical simulation calculation. By using different soil to add different salt, the soil with different water content and salt content The freezing temperature of saline soil is considered, and the influence of different factors on freezing temperature of soil is taken into account.The experiment shows that the freezing temperature of soil decreases with the increase of salt content, no matter what kind of ions are contained in it, The content of soluble salt in soil has the control effect on the freezing temperature.The influence of the common anion and cation in the soil on the freezing temperature are: Cl-> CO23-> SO24-, K +> Na +> Ca2 + Under the salinity of water, the smaller the soil particle size, the lower the freezing temperature. With the increase of water content, the difference of freezing temperature affected the decrease.