冻裂是多年冻土地区沥青路面的主要病害。
Frost crack is the main failuve of asphalt pavement in permafrost region.
因此，研究分析多年冻土地区单桩应力状态有着很重要的现实意义。
So, analysing the stress state of single pile foundation in permafrost area has realistic meanings.
钢筋混凝土盖板涵、圆管涵和合金钢波管涵等都适应于多年冻土地区。
Rc slab culvert, circular culvert and alloy steel corrugated culvert are applicable to the secular frozen earth area.
应用多种方法对多年冻土地区5种不同路面结构进行了寿命周期费用分析。
Life cycle costs for 5 different pavement structures in permafrost zone were analyzed.
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.
目前，针对级配碎石力学性能研究较少，在多年冻土地区的应用研究还是空白。
There are 50 years history about subgrade construction technology and the relevant research in the permafrost regions.
目前，针对级配碎石力学性能研究较少，在多年冻土地区的应用研究还是空白。
At present, the study on mechanical behavior of graded broken stone is very limited and there is no any study of its application especially in perennially frozen soil zone.
在多年冻土地区修建铁路，为确保冻土路基的稳定，应使路基长期处于冻结状态。
In permafrost regions, the construction of railway should keep the subgrade frozen permanently so as to maintain the stability of the frozen subgrade.
多年冻土地区独特的气候条件和地质条件决定了该地区沥青路面结构设计的特殊性。
Because of unique climatic condition and geological condition in perennially frozen soil zone, structural design of asphalt pavement in this area has its particularity.
因此，如何在多年冻土地区进行变电站接地系统的设计，是设计中一项很关键的工作。
So, how to proceed with the design work of the substation grounding system in permafrost region is a key step in the whole design work.
多年冻土地区修筑道路一直是世界性难题，至今仍然是许多国家和地区研究的热点。
Subgrade construction technology in permafrost regions is a worldwide difficult problem. Nowadays, this problem is still a focus in many countries and regions.
本文从路面材料和结构两方面，对多年冻土地区沥青路面设计技术进行系统深入的研究。
In this thesis, the author systemically study on the asphalt pavement design technology of the permafrost area from the material and the structure.
本文根据笔者的多年教学和设计实践。介绍了多年冻土地区公路冻害的成因及防治的一般方法。
Acoording to instruction and experiment for many years, the authors introduced the formation causes of road freeze injury in freeze earth areas and give general prevention ways.
探讨了在多年冻土地区影响土壤电阻率的因素和使用低电阻接地模块降低接地电阻的工程方法。
The factors affecting the resistivity of frozen soils were discussed, and some solutions to grounding for lightning using grounding modules were introduced.
多年冻土地区路面水泥稳定砂砾基层应用中，普遍存在基层上下松散、中部板结的“夹层”现象。
The interlayers that characterized as harden in middle and incompact in top and below widely occurred in the cement-stabilized-gravel when contrustruing the base course of pavement in permafrost area.
沥青混合料的低温抗裂性能是多年冻土地区沥青路面的关键路用性能之一，老化对其有着重要影响。
The asphalt mixture's crack resistance at low temperature is one of the key pavement performances in perennially frozen soil zone, and aging procedure has important effect on it.
在多年冻土地区，尤其是高含冰量的多年冻土区，阴阳坡的出现给路基的稳定性带来了极大的危害。
When road water content, the is constructed in permafrost region of long time, especially with rich stability of embankment is dramatically imperiled by the "Yin-Yang" slope.
为确保纳赤台—五道梁—沱沱河送电线路工程多年冻土地区铁塔基础地基的稳定，部分地段采用了热棒处理措施。
The part area adopts heat-bar treatment measure, to ensure permafrost areas iron tower foundations stability of Nachitai-Wudaoliang-Tuotuohe transmission line engineering.
对高寒地区多年冻土地基的特性进行了分析，根据工程设计实践，总结出几种常用的基础做法。
The article analysed the characters of foundation in permafrost areas. Basedon the practice of engineering design, it presents several usual type of foundation.
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.
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.
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