多年冻土区级配改良结构性路基热学机制 - 中南大学学报（自然科学版、英文版） 关键字: 多年冻土;级配改良;结构性;有限元[gap=1399]Key words: permafrost; improved gradation; structure; finite element method
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Permafrost ecosystems 永久冻土生态系统
permafrost table 永冻面 ; 永久冻土台 ; 永冻土层面 ; [地质] 永冻土面
Permafrost Roadbed 多年冻土 ; 冻土路基
dry permafrost 干燥永冻区 ; [地质] 干永冻层 ; 干永冻区 ; 干性永冻区
passive permafrost 不活动永冻层 ; [地质] 死永冻土
permafrost subgrade 冻土路基
permafrost subsoil 永冻心土
permafrost drilling 永冻层钻井 ; [油气] [地质] 永冻土钻孔
active permafrost 活跃永冻层 ; [地质] 活动永冻土
Patchy permafrost is ede of vast and continuous permafrost zone which is degrading, it is discontinuous horizontally.
岛状多年冻土是大片连续多年冻土退化的边缘地带，具有平面上不连续特点。
参考来源 - 岛状多年冻土地区路基路面稳定性研究Finally, the reasonable design parameters were provided to the project, and the investigation was significant to the design of the thermosyphon foundation in the permafrost region in China.
最终,为该工程取得了合理的设计参数。 以上工作将对多年冻土地区热桩基础的设计有重要的参考价值。
参考来源 - 高寒地区高压输电杆塔热桩基础研究·2,447,543篇论文数据，部分数据来源于NoteExpress
N-UNCOUNT Permafrost is land that is permanently frozen to a great depth. 永冻土层
Their roots don't grow very deep, so the permafrost doesn't interfere with their growth.
它们的根长得不深，所以永久冻土不会影响它们的生长。
Beneath this active layer is a second layer called "permafrost", which is frozen all year around, and is impermeable to water.
在这一活跃层下面，是被称为“多年冻土”的第二层，终年冻结，不透水。
There're two reasons for this: first, they live in the active layer, which, remember, contains water that doesn't penetrate the permafrost.
造成这种情况的原因有两个：首先，它们生活在活动层中，请记住，活动层中包含的水不会渗透永久冻土。
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