Soil Sample Ezperiment on water Migration in Soil during Freeze-thaw Process
Some shallow slides occur on soil slopes during springs in seasonal frozen regions. The slides are mainly from water migration in freeze-thaw process. Water migration in unsaturated loam during freeze-thaw process is dealt with by experiment in this paper. A set of laboratory facilities of water migration are assembled. Total 7 undisturbed soil samples and 10 reshaped samples are adopted in the test. A set of initial water contents and temperatures are taken into account respectively, while keep the other, conditions as the same. The results show that there is a water upward move during the freezing process from the top to the bottom, and the layer with the most rich water content is at the top after the frozen. And there is a water downward move during the thawing process from the top to a given depth, and the layer with the most rich water content is just above the thawed-frozen interface. It is also showed that the more initial water content, the more amount of water migrated;and the lower temperature at the top, the less water migrated. The test result provides an experimental basis to establish a water migration model of unsaturated clay in a freeze-thaw cycle.
water migration freeze-thaw process unsaturated soil
Xiaxin Tao Gang Zhao Bing Liu Hao Xu
Harbin Institute of Technology, Harbin, China
国际会议
哈尔滨
英文
440-447
2009-07-22（万方平台首次上网日期，不代表论文的发表时间）