The Effects of Frost Heaving on Objects in Soils, II: Laboratory Experiments
The Effects of Frost Heaving on Objects in Soils, II: Laboratory Experiments
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冻胀对土壤中物体的影响，II：实验室实验
DOI：
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发表时间：
1977
期刊：
影响因子：
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通讯作者：
M. L. Barnhardt
中科院分区：
文献类型：
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作者：
Donald L. Johnson;D. Muhs;M. L. Barnhardt
最近的实验室研究土壤中的人工制品的冻胀与考古学家，地貌学家，北极和阿尔卑斯山的专家。进行了调查，以确定具有不同有效高度（埋置物体的垂直尺寸）的文物对冻胀的敏感性。为此，木销钉从0到90度的水平和垂直方向的不同长度的木制平行六面体定向安置在饱和土壤中，并交替冻结和解冻。这些研究表明，发生差异性的冻胀;物体与水平方向和垂直方向的物体有较大的角度，长度较大的物体由于冻胀而经历更大的向上运动。此外，除了被霜向上隆起，文物取向在不同的角度往往会旋转向垂直与每个冻融循环。结果的意义是双重的。首先，从数据中生成的统计模型提供了一个定量评估的作用，有效高度的工件的冻胀。其次，由于可以推断出各分力的分布情况，因此，所得结果对于模拟冻土的冻胀过程具有重要意义。
Recent laboratory studies of frost heaving of artifacts in soils are relevant to archaeologists, geomorphologists, and Arctic and Alpine specialists. Investigations were undertaken to determine the susceptibility to frost heave of artifacts with differing effective heights (the vertical dimension of buried objects). To this end, wooden dowels oriented from 0 to 90 degrees from the horizontal and vertically oriented wooden parallelepipeds of different lengths were emplaced in saturated soil and alternately frozen and thawed. These studies show that differential frost heaving occurred; objects with larger angles from the horizontal and vertically oriented objects with greater lengths experience greater upward movement due to frost heaving. Moreover, in addition to being frost heaved upwards, artifacts oriented at differing angles tend to rotate towards the vertical with each freeze-thaw cycle. The significance of the results is twofold. First, statistical models generated from the data provide a quantitative assessment of the role of effective height in frost heaving of artifacts. Secondly, the results are important in modeling the mechanics of the frost heaving process because the distribution of com ponent forces may be inferred.