IMPROVEMENT OF HIGH-MOISTURE SOIL BY REPEATED FREEZING AND THAWING
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.
Freeze-Dry High Water Content Improving
ATSUKO SATO TERUYUKI SUZUKI SATOSHI NISHIMOTO SATOSHI YAMASHITA
Geotechnical Research Team, Civil Engineering Research Institute for Cold Region, PWRI, Hiragishi 1- Department of Civil Engineering, Kitami Institute of Technology, Koencho 165, Kitami, 090-8507, JAPA Geotechnical Research Team, Civil Engineering Research Institute for Cold Region, PWRI, Sapporo, 062
国际会议
第三届中日岩土工程研讨会(Proceedings of the 3rd Sino-Japan Geotechnical Symposium)
重庆
英文
471-478
2007-11-05（万方平台首次上网日期，不代表论文的发表时间）