冻胀作用

冻胀作用对孢粉聚集速率测定的影响

Influences of Frost Heaving on the Determination of Pollen Accumulation Rates

由于寒冷地区冻胀作用，使得圆管涵冻害严重影响了公路的高速发展。

Frost failures of circular - pipe culvert limit the development of highway secretly for the reason of local frost effect .

因为冻土每年均会冻融，因此对衬砌的冻胀作用是每年都会增加的，相当于累积效应。

Because each year permafrost will freezing and thawing , the frost heave on the lining will increase at the same time , equal to cumulative effect .

在冻土地区，板形基础被广泛应用，由于冻胀作用对板基础造成各种冻害破坏。

Based on fracture mechanics theory , a general failure criterion is set up and a fully new analysis method is given for plate foundation and ground widely used in cold regions .

法向冻胀力作用机制探讨

Discussion on the mechanism of normal frost heaving force

在排桩冻结深基坑工程中，冻结壁将对排桩产生较大的水平冻胀力作用，但冻胀力的大小难以确定。

In the deep excavation , row-piles are imposed larger horizontal frost-heaving force , but the force value is intractable to ascertain exactly .

二维理论计算时将衬砌管片开口段简化为开口圆环，推导出在地层水土荷载和冻胀力作用下能够考虑开口管片横截面上剪切作用的管片结构支撑力计算公式。

The open section of the lining segment is simplified as open-ring during 2D theoretical calculation to deduce the calculation formula of supporting forces under stratum water-soil load and frozen-heaving force , which considers the shearing action on the cross section . 3 .

考虑冻土自身存在的各种缺陷及冻胀力的作用和影响，应用断裂力学理论与方法，研究冻土破坏的机理，建立了冻土断裂力学破坏准则。

Considering various kinds of deficiencies existing in material and frost heaving force effects , a failure criterion is established for frozen soil based on the fracture mechanics theory .

裂隙岩体围岩中的水冻结膨胀产生的冻胀力部分直接作用于隧道衬砌上，部分通过围岩间接传递到隧道衬砌上。

In jointed surround-rock , when frost force formed , part of which acted on tunnel lining directly , the other part acted on lining indirectly by rock .

泡沫塑料作为一种新型道路隔温材料，用来替代传统的防冻层，以保障路基不产生冻结、聚流和层状冰晶体的析出，并起到预防道路冻胀和翻浆的作用。

Foamed plastic , a new road insulating material , can be used for replacing the traditional frost protection courses , to prevent freezing , migrating of moisture and layered crystal separating out , and prevent subgrade form frost heave and frost boiling .

分析土的冻结过程是研究高寒地区地基处理方法的一个重要环节，而土的物理性质对冻胀性的影响作用剖析是冻结过程分析的重要内容。

It is an important linkage to analyze the frozen process of soil for doing a research on the treatment method in a high and cold area , while the analysis on the effect of the physical characteristics of soils on the heaving properties is an important content .

北方寒冷地区路面损坏主要是由于冻胀等因素引起的，这种基层可以减小水分的冻胀作用，增加路面使用寿命。

In north cold area pavement is usually distressed because of heave factor , and the base may reduce water heave function and increase pavement service life .

均质破碎围岩本身是一种多相的混合介质体，由冰体冻结直接产生冻胀力的效应较弱，而主要是在一定范围内的围岩整体的冻胀作用产生的冻胀力作用在衬砌上。

Homogeneous rock was a poly-phase mediator , in such surrounding-rock , the effect of frost force directly formed by water freezing was little , and frost force we concerned with was that formed by the freezing of soil in a range of surrounding tunnel lining .