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为研究寒旱区盐渍土中盐的分布和运移特征,对青藏铁路西宁至格尔木区间具有代表性的盐渍土进行室内蒸发和冻融土柱实验,分析粘土夹层对盐分运移特征的影响。实验结果表明,土柱中的盐分在蒸发和冻融条件下都表现出较显著的聚表特征,而粘土夹层则有效阻碍和抑制了盐分的上升,这种阻碍能力随着位置由上而下依次减弱。本文的研究结果可以为寒旱区盐渍土的治理提供参考。
In order to study the distribution and migration of salt in saline soil in the cold and dry areas, the laboratory experiments were carried out on the saline soil in Xining-Golmud region of Qinghai-Tibet Railway to analyze the characteristics of salt migration influences. The experimental results show that the salinity in the soil column shows more significant aggregate characteristics under evaporation and freeze-thaw conditions, while the clay interlayer effectively hinder and inhibit the salt rise, Weakened in turn. The results of this paper can provide reference for the treatment of saline soil in the cold and arid regions.