| Temperature in freezing unsaturated loess affected by dry density and water content |
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| DOI：10.7606/j.issn.1000-7601.2014.01.019 |
| Key Words: loess freezing temperature water content dry density |
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| Abstract: |
| By using developed test and monitoring equipment, the experiment was carried on to study on the temperature of unsaturated loess under different conditions of dry density and water content. The test data revealed that the heat conduction of soil would be impaired when dry density increased, and the effect enhanced gradually as time went on. Water content also had obvious influence to change the
temperature of freezing soil. For the soil of higher water content, the temperature dropped sharper; and was lower at the steady stage. Regression analysis was carried out on the test results which showed that soil temperature and temperature gradient appeared staging a function with freezing position and time. It was pointed out that water content was the main factor of the temperature and temperature gradient of loess in early freezing stage. And this dropped more severely with increasing water content. While the change of soil temperature was the result of the combined effect of dry density and water content in late freezing stage. And with increase of both them the degree of dropping temperature of soil was decreased. |