IMPROVEMENT OF HIGH-MOISTURE SOIL BY REPEATED FREEZING AND THAWING

机译：反复冻融改善高水分土壤

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Toward use of soil generated as a byproduct of construction, a method of improving high-moisture soil by subjecting it to repeated freezing and thawing was examined. Ground freezes from the surface downward, and during this process soil moisture is drawn upward by capillary action. The moisture content of soil that has frozen is high, whereas the moisture content of non-frozen soil below that is low, because water is drawn upward toward the soil that has frozen. If high-moisture soil can be improved to yield low-moisture soil using this phenomenon, low-cost improvement will be possible. After confirming in indoor experiments that moisture can be reduced by repeated freezing and thawing, changes in soil temperature and soil moisture in winter were monitored in outdoor experiments. It was shown that unsuitable soil could be improved by repeated freezing and thawing, that the improvement extended 15 to 20 cm beyond the soil freezing depth, and that improvement was enhanced by preventing water from rising through the bottom of the soil pit.

机译：为了使用作为建筑的副产物而产生的土壤，研究了一种通过反复冷冻和融化来改善高水分土壤的方法。地面从地面向下冻结，在此过程中，土壤水分通过毛细作用向上吸收。冻结的土壤的水分含量较高，而低于该值的非冻结土壤的水分含量较低，这是因为水朝着冻结的土壤向上吸。如果利用这种现象可以改善高水分土壤以生产低水分土壤，那么低成本的改良将是可能的。在室内实验中确认可以通过反复冷冻和融化来减少水分后，在室外实验中监测冬季土壤温度和土壤湿度的变化。结果表明，不适当的土壤可以通过反复冷冻和融化得到改善，这种改善超出了土壤冻结深度15到20 cm，并且通过防止水从土坑底部上升而得到了改善。

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来源
《Sino-Japan Geotechnical Symposium November; 20071104-07; Chongqing(CN)》|2007年|P.471-478|共8页
会议地点 Chongqing(CN)
作者
ATSUKO SATO; TERUYUKI SUZUKI; SATOSHI NISHIMOTO; SATOSHI YAMASHITA;
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作者单位

Geotechnical Research Team, Civil Engineering Research Institute for Cold Region, PWRI, Hiragishi 1-3-1-34, Toyohira-ku, Sapporo, 062-8602, JAPAN;

Department of Civil Engineering, Kitami Institute of Technology, Koencho 165, Kitami, 090-8507, JAPAN;

Geotec;

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会议组织
原文格式 PDF
正文语种 eng
中图分类土力学、地基基础工程;
关键词
Freeze-Dry; High Water Content; Improving;

机译：冻干；高水分；改善;

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机译：融化前的土壤水分会影响融化过程中土壤溶解有机物的数量组成和稳定性
7. Studies on the freezing and thawing of the volcanic ash soils in eastern Hokkaido (II) : Soil freezing and thawing in a grassland (Sasa nipponica) and a brush cutting area [O] . 竹内典之 1981

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IMPROVEMENT OF HIGH-MOISTURE SOIL BY REPEATED FREEZING AND THAWING

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