Research about salt and frostheaving is helpful to further know the engineering properties of sulfate(sulfurous) saline soil.
对盐胀和冻胀规律的研究有助于深入认识硫酸（亚硫酸）盐渍土的工程性质。
2
From adding substances to have physical and chemical effect on forst heavingsoil grain to change the feature of the base, then reduce or eliminate the frostheaving feature of base soil.
通过外加物质与地基冻胀土颗粒进行物理化学作用，改变地基的特性，以减少或消除地基土的冻胀性。
3
The frostheaving damage can be thoroughly solved by laying a heat preservation layer in good condition under the rigid lining to prevent the frostheaving of the base soil.