Frostaction and permafrost effects under different geological conditions are considered.
文中探讨了不同地质条件下的冻融作用及多年冻结效应。
2
It may also provide drainage and give added protection against frostaction when necessary.
它具有排水作用，但在需要时也增加保护抗冻作用。
3
It has become a common understanding that frostaction is a kind of weathering process, which considerably changes engineering properties of soils due to cryogenical actions.