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土体单向冻结对土中水分迁移的影响(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2013年01期
Page:
117-121
Column:
研究论文
publishdate:
2013-01-15

Article Info:/Info

Title:
Effects of unilateralist freezing on the moisture migration of soil
Author(s):
ZHANG TingYANG Ping*
College of Civil Engineering,Nanjing Forestry University,Nanjing 210037,China
Keywords:
soil unilateralist freezing soil’s moisture migration moisture content dry density
Classification number :
TU445
DOI:
10.3969/j.issn.1000-2006.2013.01.021
Document Code:
A
Abstract:
The test object was column sample of shallow top soil in Nanjing,Suzhou and Wuxi, the unsaturated soil was tested by unilateralist freezing way tests on unsaturated soil,the soil’s moisture migration behaviors were analyzed under the influence of moisture content, dry density and freezing time. The following conclusions could be drawn:the sample’s freezing front position was relationship with freezing time, the freeze frontal movement speed of begin two hours(1.55 cm/h)was slightly higher than the end of the two hours(1.20 cm/h).The moisture migration capacity and scope were negative correlation with the soil’s dry density,the top and bottom moisture variation of sample was relationship with dry density.After unilateralist freezing, the moisture migration was remarkable in unsaturated muddy clay when soil’s moisture content was higher.The results also showed that mealy sand was apt to quickly freeze, and moisture migration capacity of that was little impacted by initial moisture content of soil. The water content increment was the same in each frozen section of silty clay under the same freezing conditions.

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Last Update: 2013-01-15