冻胀

Finally, it discusses the application of the research production in engineering and brings forward some measure about controling frost-heaving and minishing thaw-settlement. These task has great applied importance and guide significance to the artificial freezing methodspractice in the municipal underground engineering and will reduce the endangerment to the ambience in the future.

论文最后讨论了研究成果在工程中的应用，并提出了抑制冻胀减小融沉的措施，这些工作对今后人工冻结在城市地下工程中应用和减小对周围环境的危害具有重要的实用价值和理论指导意义。

Here displacement and stress fields caused by migrating pingos and stresses of bended bridge pier were calculated by three dimensional finite element modeling based on field observation and laboratory tests, and breaking mechanism of bridge pier was analyzed after the numerical modeling.

考虑移动冰丘与工程设施的相互作用，根据野外观测和实验资料设计模型，应用三维有限元数值模拟方法，计算移动冰丘冻胀产生的位移场、应力场和桥墩弯曲应力，分析桥墩破裂机理。

There are six typical migrating pingo s along the Qinghai-Tibet Railway and freezing and swelling of some of these pingos caused fracturing of bridge piers and culverts and bending of oil pipelines along the railway and highway.

青藏铁路沿线发育6个典型移动冰丘，冰丘冻胀对线路工程具有严重破坏作用，导致桥墩扭裂、涵洞破裂与输油管道弯曲变形，产生显著的灾害效应。

Migrating pingo ; heterogeneous freezing expansion ; bridge pier ; numerical modelling ; north Tibe- Plateau

移动冰丘；不均匀冻胀；桥墩；数值模拟；青藏高原北部

This paper analyzes the influence of frozen soil,foundation freezing and thawing on pipeline,describes the importance of pipeline survey in frozen soil district and introduces the steps and methods of pipeline survey in frozen soil district.

分析了冻土及地基土冻胀和融沉对管道的影响，阐述了在冻土地区管道勘察的重要性，介绍了冻土地区管道勘察的步骤和方法。

First through theoretical analysis, discusses the factor effecting the frost heave, as well as the frozen soil and structure interaction.

首先通过理论分析，对影响冻土冻胀的因素以及冻土与结构物相互作用的规律进行探讨。

Result shows that the accumulative thawing settlement is twice more than the frost heave.

对某一典型路基第30年的变形进行了预测，结果显示路基的累计融沉量在冻胀量的两倍以上。

And prevent subgrade form frost heave and frost boiling.

并起到预防道路冻胀和翻浆的作用。

This paper expounds the production technology of PVC compound geomembrane with seepage prevention and frost heave resistance .

论述了防渗漏、抗冻胀PVC复合土工膜的生产工艺，讨论了增塑剂种类、用量对土工膜性能的影响，以及添加抗冲击改性材料对PVC土工膜低温强度的影响，探讨了土工织物的种类并对之进行了选择。

However, frost heave and thawing settlement exert bad influence on surroundings so that the method is not adopted in projects which need high environment protection requirement.

但冻结引起的土体冻胀融沉对环境产生了负面影响，制约了冻结法在对环境要求高的地方的应用。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。