多年冻土地区路基病害主要由冻土土体在季节变化条件下的冻融循环造成的。
The disease of subgrade in permafrost region was mainly induced by frost heaving and thawing circulation of frozen soils because of change of seasons.
这些因素都是通过影响地温场的变化而对多年冻土施加作用效果。
The factors above always give effect to the permafrost by changing the ground temperature field.
气候变化和人类活动加剧，致使我国东北地区多年冻土退化严重。
The climate change and the intensifying human activity cause the permafrost degradation in Northeast China.
准确确定多年冻土上限的位置及掌握其变化规律是冻土地区工程勘察的基本工作和重要内容。
It is important work to confirm the position of natural permafrost table and grasp its change law. Introducing the exploring method of natural permafrost table in Qingzang railway.
多年冻土区修筑沥青路面后，引起了路基下多年冻土上限、多年冻土热状态等变化。
After asphalt pavement having been constructed in permafrost regions, permafrost thermal regime and permafrost table under roadbed will undergo a change.
该研究为多年冻土区水文过程的变化规律提供了同位素证据。
This study provides isotopic evidence in hydrological cycle research and a theoretical support of water resource protection in permafrost regions.
该研究为多年冻土区水文过程的变化规律提供了同位素证据。
This study provides isotopic evidence in hydrological cycle research and a theoretical support of water resource protection in permafrost regions.
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