1)  thawing settlement
融沉变形
1.
On the basis of limit equilibrium equation for thawing settlement of permafrost subgrade,a global optimal algorithm is put forward to calculate the reliability index and failure probability based on genetic algorithm.
在冻土路基融沉变形极限状态方程的基础上,从可靠度指标的几何涵义出发,提出了基于遗传算法的冻土路基融沉可靠度指标和失效概率的计算方法。
2)  non-uniform melt settlement deformation
不均匀融沉变形
1.
The universal phenomenon of non-uniform melt settlement deformation in perennially frozen soil zone is analyzed.
针对多年冻土地区普遍存在的路基不均匀融沉变形现象,根据弹塑性固结理论,采用有限元方法对路基融沉变形进行计算分析,探讨了边界排水条件对路堤融沉变形以及路基表面水平位移的影响,并分析了地基融深和路堤高度对沉降的影响。
3)  melt settlement deformation law
融沉变形规律
4)  thaw
融沉
1.
One side,soil frost heave and thaw settlement can produce extra stresses in pipe walls,which may result in centralized stresses and plastic deformations under certain conditions,even causing pipeline fault.
在冻土地区铺设油气输送管道,将遇到很多技术难题和挑战,一方面,土体的冻胀和融沉会对管壁产生额外应力,在适当的条件下引起应力集中和塑性变形,甚至造成管道破坏;另一方面,埋设于冻土地带的管道会对周围环境产生扰动,造成冻土退化,反过来又影响管道安全。
2.
By observing the site temperature data of the embankment,we get that the stress field is redistributed in the embankment because of the thaw of permafrost.
本文通过对路基现场温度进行监测分析,得出路基纵向裂纹形成的原因是路基下的冻土融沉引起路基应力场重新分布;借助断裂力学定性的分析了裂纹在路基内部的扩展趋势,定性分析的结果与现场的路基剖面图是一致的,最后就裂纹今后的扩展的趋势和有可能的危害进行初步预测。
5)  thawing settlement
融沉
1.
Taking an auxiliary shaft of a certain mine as an example, the authors have designed a finite element programme to analyse the elasticity of the negative frictional force applied to the shaft by thawing settlement of the frozen shaft wall, and understood preliminarily its distribution rule and effect.
以冻结法施工的某矿副井为例 ,编制有限元程序 ,对冻结壁融沉作用在井壁上负摩擦力进行弹塑性分析 ,初步得到该负摩擦力的分布规律及影响因素 ,即该融沉负摩擦力在深度方向上由地表到中上部呈递增 ,然后呈递减 ;融沉负摩擦力与土层的性质、水平侧压力大小、融沉量等因素密切相关。
2.
Based on analysing the differences between artificially frozen soils and naturally frozen soils and comparing the present testing devices for the study of frost heave and thawing settlement at home and abroad, a new device for studying the frost heave and thawing settlement of artificially frozen soil was developed.
在分析人工冻结土体与自然冻结土体的冻结差异、比较国内外土体冻融模型试验装置的基础上，介绍了所研制的人工冻结土体冻胀融沉模型试验装置及其应用情况。
3.
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。
6)  thaw settlement
融沉
1.
In order to analyze stress mechanics of corm- gated pipe culvert on the condition of thaw settlement, the paper analyzes mechanical property of metal corm- gated pipe culvert and corrugated pipe in permafrost re- gion with large-scale finite element software.
为分析波纹管涵洞融沉下的受力机理,利用大型有限元软件对多年冻土地区采用的金属波纹管涵洞和波纹管本身进行力学性能分析,通过分析可知,金属波纹管本身具有较大的横向补偿位移的能力,波纹管涵洞对预防和彻底解决涵洞因融沉而导致的破坏较为有效。
2.
This paper makes an introduction of the mechanism of thaw settlement grouting,and the method of reinforcing soil by forced thaw settlement grouting.
对冻土融沉注浆的机理以及利用强制解冻方法融沉注浆进行土体加固的方法作了详细介绍,并结合某地铁联络通道的融沉注浆施工,说明了对冻结土体进行分区强制解冻融沉注浆是控制地表沉降的有效方法。
3.
They are: the temperature field in frozen soil under climate and engineering conditions; frost heaving and thaw settlement of permafrost roadbed; the support force of frozen soil under the roadbed; the frost heaving of many kinds of engineering constructions (especially culverts and stake bases); the influence of regenerative damages on railway bed; active protectiv.
根据已有的寒区工程研究资料和关于青藏公路和铁路的不断研究成果,总结了青藏铁路建设中存在的冻土力学问题,具体表现为:气候和工程影响下路基下冻土温度场变化;多年冻土路基的冻胀和融沉变形;路基的冻土承载力(动载、静载)的变化;修建的各种工程结构物下的冻胀力(特别是涵洞和桩基);次生灾害对铁路路基的影响;主动保护冻土的冻害防治措施问题。
参考词条
补充资料：冻土融沉
    　　冻土融化时的下沉现象。包括与外荷载无关的融化沉降和与外荷载直接有关的压密沉降。
　　
　　冻土融化时发生着两个相反的过程：压密和膨胀。①冻土中的各种冰融化后体积缩小,使土因自重下沉;冰变成水后通过孔隙逐渐排出，使土压密而进一步下沉。②土粒及其集合体在融化时由于水化作用而膨胀。通常情况下，冻土融化时的压密大于膨胀，故产生融化下沉。当整体冷生构造的冻土融化时，其融沉量一般不大。但层状和网状冷生构造的冻土融化时,常有明显的沉降,有时会发生突陷。当冻土的融化速度很快时，会出现冰变成水的速率大于水能从土中排出的速率，从而使土中的孔隙压力增加，常造成斜坡和各种建造物的不稳定。融沉是多年冻土区建造物破坏的主要原因。在天然情况下，冻土的融沉会形成各种热喀斯特现象（见冰缘地貌）。
　　

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