盐渍土作为一种环境敏感性特殊土,它所包含的水分、盐分会随着外界环境的变化而变化。在对罗布泊地区天然盐渍土进行多次冻融循环盐胀—冻胀试验基础上,探究其水、盐迁移规律。研究发现:在整个冻融循环过程中,冻融作用导致不同埋深土样中的水分与盐分垂直向运移,总体上自下而上向冷端迁移,冷端层含水量增加最为明显,且保持“盐随水走”的迁移规律。长期如此将造成路基表层含盐量聚集,严重影响道路工程的稳定性。 Saline soil as a special environmentally sensitive soil, which contains water, salinity with the external environment changes. On the basis of repeated experiments of salt expansion and frost heaving in natural saline soil in the Lop Nur area, the migration rules of water and salt were explored. The results showed that during the whole freeze-thaw cycle, the freezing and thawing resulted in the vertical migration of water and salinity in soil samples with different burial depths. Generally, the migration from the bottom to the cold end was the most obvious, And to keep “salt with water ” migration rule. Long-term so that will result in the accumulation of salinity surface subgrade, seriously affecting the stability of road projects.