本文通过用不同含水量、不同密实度的封闭系统冻胀试验和开放系统冻胀试验,研究了兰新线路基土冻胀特性。试验结果表明,在封闭系统和开放系统下冻胀率均随含水量的增大而增长,随压实度增加而减少。由于水分的补给,开放系统下的冻胀率远大于封闭系统下的冻胀率。 In this paper, the frost heaving characteristics of the basement soil of Lanxin Line are studied by using the closed system frost heaving test and the open system frost heaving test with different water content and different densities. The experimental results show that the frost heaving rate increases with the increase of water content in closed system and open system, and decreases with the increase of compaction degree. Due to the supply of moisture, the frost heaving rate under the open system is much larger than the frost heaving rate under the closed system.