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一、引言 在多年冻土地区,随着土中水分的冻结和融化,会导致一系列奇异独特的冻土现象,如冻胀丘、冻融滑塌和热融沉陷等。这些现象往往给结构物造成灾害,如建筑物的损坏,道路的翻浆和沉陷,管道的折裂和变形等。因此测定冻土水分随季节、土质和土层深度等的变化,确定冻结和融化速率及多年冻土上限等,就是冻土研究和勘测的一项重要内容。
I. INTRODUCTION In permafrost regions, with the freezing and thawing of water in the soil, a series of strange and unique permafrost phenomena such as frost heave, freezing-thawing slump, and thermal melting and thawing will occur. These phenomena tend to cause disasters to the structure, such as the damage of the building, the sloughing and sinking of the road, the fracture and deformation of the pipeline, and the like. Therefore, the determination of frozen soil moisture with the seasons, soil and soil depth changes, to determine the freezing and thawing rate and permafrost and so on, is the study and survey of frozen soil is an important part.