Experimental Study on Freezing Temperature and Thermal Conductivity ofSalty Frozen Soil
[1]JIN Yijie,TAO Yong,ZHANG Ting,et al.Experimental Study on Freezing Temperature and Thermal Conductivity ofSalty Frozen Soil[J].Journal of Zhengzhou University (Engineering Science),2023,44(04):120-126.[doi:10.13705/j.issn.1671-6833.2022.04.021]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
44卷
Number of periods:
2023 04
Page number:
120-126
Column:
Public date:
2023-06-01
- Title:
- Experimental Study on Freezing Temperature and Thermal Conductivity ofSalty Frozen Soil
- Keywords:
- salty frozen soil; freezing temperature; thermal conductivity ; salt content; initial moisture content
- CLC:
- TU445
- DOI:
- 10.13705/j.issn.1671-6833.2022.04.021
- Abstract:
- The purpose of this study was to reveal the effect of salt content and initial water content on the thermalphysical properties of silty clay, the freezing temperature and thermal conductivity of silty clay with distinct salt con-tent and water content were measured by indoor temperature test ， and the effects of distinct factors on freezing tem-perature and thermal conductivity of silty clay with distinct salt content and water content were revealed.The resultsdemonstrated that:The freezing temperature and supercooling temperature of NaCl salty silty clay permafrost dimin-ished linearly with the increase of salt content，while the freezing temperature and supercooling temperature ofNa,S0。salty silty clay permafrost first diminished and then increased slightly，and the thermal conductivity of bothsalty silty clays diminished with the augment of salt content.At the moment of the initial water cut was inferior to thesaturated water cut , there was a positive correlation between initial moisture content and freezing temperature andthermal conductivity , and the moisture rate was the dominant element that could affect the freezing temperature , andafter it surpassed the saturated water cut，the salt content became the dominant element. When the rate of waterclose to the liquid limit，the thermal conductivity of the two saline soils increased tardily. At the same time，theempirical formulas of freezing temperature and thermal conductivity in different conditions were given， and the wa-ter-salt-temperature variables were linked with freezing temperature and thermal conductivity , which could provide areference for engineering construction in salty soil distribution areas.
- References:
-
[1] ALDAEEF A A，RAYHANI M T. Interface shearstrength characteristics of steel piles in frozen clay undervarying exposure temperature[ J]. Soils and Foundations,2019，59(6): 2110-2124.[2]应赛，周凤玺，文桃，等．盐渍土冻结过程中的特征温度研究[J]．岩土工程学报，2021,43( 1):53-61.YING s, ZHOU F x，WEN T ,et al. Characteristic temper-atures of saline soil during freezing[J]. Chinese Journal ofGeotechnical Engineering ，2021， 43( 1):53-61.
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Last Update:
2023-07-01