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人工冻土融沉特性试验研究(PDF)

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

Issue:
2008年04期
Page:
108-112
Column:
研究论文
publishdate:
2008-07-20

Article Info:/Info

Title:
Study on thaw settlement behaviour of artificial freezing soil
Article ID:
1000-2006(2008)04-0108-05
Author(s):
WANG Xiao-bin YANG Ping* ZHANG Ting
College of Civil Engineering Nanjing Forestry University, Nanjing 210037, China
Keywords:
Artificial freezing soil Thaw settlement coefficient Water content Dry density Freezing end temperature
Classification number :
TU445
DOI:
10.3969/j.jssn.1000-2006.2008.04.025
Document Code:
A
Abstract:
In order to promote the application of the artificial freezing technology in the underground engineerings of city, a set of testing devices were developed to do frozen swollen experiment and thaw settlement experiment of artificial permafrost. According to three kinds of soil in Nanjing region, thaw settlement experiments were done at the selfdeveloped testing devices. The experiments results showed that the thaw settlement of soil occured only when the soil water content above the boundary water content. The thaw-settlement coefficient increased with the water content augment. Regarding to non-saturated soil,there existed a critical dry density between thaw-settlement coefficient and dry density changes. The critical dry density corresponded to the thaw-settlement coefficient in the smallest soil body. As there is the water source supply, thaw-settlement coefficient increases along with the temperature increment. When the water source doesnt supply, thaw-settlement coefficient reduces along with the temperature increment. Mealy sand is not the frozen swollen sensitive soil if it was compared with silt clay and mealy clay.

References

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Last Update: 2013-05-20