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- This is the vegetational climate of arctic permafrost regions. 这是北极永冻地区的植物气候。
- Engineering damages of embankment in permafrost regions are mainly caused by thaw settlement of permafrost. 摘要多年冻土区道路病害主要是由路基下冻土温度升高融化下沉引起。
- Protecting permafrost from further thaw due to human activities is the first choice for embankment design in permafrost regions for many years. 摘要保护冻土原则是多年冻土区路基设计的首要要求。
- In seasonally frozen ground regions as well as permafrost regions,active layer is the most active terrane in terms of thermodynamics. 活动层夏季融化、冬季冻结的近地表土(岩)层,是冻土地区热力动态最活跃的岩层,在冻土研究中有着重要意义。
- The result indicates embankment berm on permafrost region should not be regarded as the main measure to improve thermal stability of embankment. 冻土路基护道不应作为提高路基热稳定性的主要措施。
- The disease of subgrade in permafrost region was mainly induced by frost heaving and thawing circulation of frozen soils because of change of seasons. 摘要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。
- As the permafrost has the trend of degradation because of the global climate wanning, the thermal stability of embankments in permafrost regions has received extensive attention. 由于全球升温致使多年冻土呈退化趋势，多年冻土地区路基的热稳定性受到了广泛地关注。
- WU Zi-wang, ZHU Lin-nan.Critical height of the embankment in permafrost regions along the QinghaiKangding Highway[J].Journal of Glaciology and Geocryology, 1998,20(1) :36-40. [1]吴紫汪;朱林楠.;青康公路多年冻土区路堤的临界高度[J]
- MA Wei,CHENG Guo-dong,WU Qing-bai.Preliminary study on technology of cooling foundation in permafrost regions[J].Journal of Glaciology and Geocryology,2002,24(5):579-587. [5]马巍;程国栋;吴青柏.;多年冻土地区主动冷却地基方法研究[J]
- Thus, the applicability of block-stone embankment structure is worth to be discussed in order to take corresponding measures to solve the stability problems of embankment in warm permafrost regions. 块石路基结构在高温多年冻土区适应性问题仍值得讨论，应采取相对应的补强措施，确保高温多年冻土区路基稳定性。
- SHENG Yu,ZHANG Luxin,YANG Chengsong,et al.Application of thermal-insulation treatment to roadway engineering in permafrost regions[J].Journal of Glaciology and Geocryology,2002,24(5):618. [5]盛煜;张鲁新;杨成松;等.;保温处理措施在多年冻土区道路工程中的应用[J]
- In comparison with permafrost regions with higher annual mean temperature, permafrost regions with lower annual mean temperature is more beneficial to the enhancement of heat transfer rate. 与年平均气温较高的多年冻土区相比，年平均气温较低的多年冻土区更有利于热管的传冷。
- To ensure the railway unblocked, it s necessary for the embankment in permafrost regions to meet not only the requirement of the thermal stability, but also the requirement of the structure stability. 为保证道路畅通，冻土路基在满足热稳定性要求的同时，道路路基的变形也必须满足设计规范要求。
- According to landslide environment,landslide of permafrost region will be divided into landslide of freezing soil and thawing soil,thaw slumping is representative thawing soil landslide. 青藏高原多年冻土区斜坡失稳是伴随着青藏公路建设和运营过程中出现的一种灾害性的地质现象,其中以热融滑塌最为显著。
- According to the investigation and the mechanism of the embankment longitudinal cracks,the main reason for the crack is the appearance of thaw area under slope foot in permafrost region. 根据青藏公路纵向裂缝现场勘察和形成机理分析,认为导致路基纵向裂缝的主要原因是路基边坡坡脚下融化区的产生及发展。
- permafrost regions ground temperature 冻土地温
- road construction in permafrost region 多年冻土地区筑路
- ground water in permafrost region 多年冻土区地下水
- China exports to many other countries regions. 中国向许多其它国家和地区出口货物。
- Most insect do not live in polar region. 大多数的昆虫不在极地地区生存。
