在苏联永久冻土的南部地区,人们进行工业企业建设,特别是进行大型、排放高热能的工业企业建设时,需要合理地使用正在解冻或已经解冻的地基土体。众所周知,工业建筑物基础既受静力作用,又受动力作用。然而,目前的科技文献却很少涉及动荷载作用下解冻土的变形问题。正在解冻的土具有一系列与已解冻土不相同的特性。但是,它们在冻结之前并没有什么不相同的结构。正在解冻的砂土中冰晶结构的特点,是存在或大或小的孔隙,这些孔隙是冰晶体和冰包裹体融化后形成的。由于这些孔隙具有很小的拱的外形,所以土体完全解冻之后,孔隙往往还能够保持下来。这种土体在静荷载作用下,还具有相当的稳定性。因此,曾受到冻结膨胀作用的解冻土,在解冻后的某段时间处于未压实的状态。解冻土还有一个特点:它 In the southern part of the permafrost of the Soviet Union, it is necessary to rationally use the foundation soil that is being thawed or thawed, in order to build industrial enterprises, especially for the construction of large-scale, high-heat-emitting industrial enterprises. As we all know, the foundation of industrial buildings is both static and dynamic. However, the current scientific literature rarely involves the deformation of thawed soil under dynamic loading. The soil being thawed has a series of characteristics that are different from thawed soil. However, they did not have a different structure before freezing. The characteristics of the ice crystal structure in the thawing sand are the existence of large or small pores formed by the melting of ice crystals and ice inclusions. Because these pores have a very small arch shape, the pores tend to remain intact after the soil is completely thawed. This soil under static load, but also has considerable stability. As a result, thawed soil, which had been subjected to freeze-swell, was in an uncompacted state for some time after thawing. There is also a special feature of thawed soil: it