[1]靳贻杰,陶 勇,张 婷,等.含盐冻土冻结温度及导热系数试验研究[J].郑州大学学报(工学版),2023,44(04):120-126.[doi:10.13705/j.issn.1671-6833.2022.04.021]
　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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含盐冻土冻结温度及导热系数试验研究()

分享到：

《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:

44

期数:

2023年04期

页码:

120-126

栏目:

出版日期:

2023-06-01

文章信息/Info

Title:

Experimental Study on Freezing Temperature and Thermal Conductivity ofSalty Frozen Soil

作者:

靳贻杰;  陶 勇;  张 婷; 杨 平

南京林业大学 土木工程学院,江苏 南京 210037

Author(s):

JIN Yijie; TAO Yong; ZHANG Ting; YANG Ping

School of Civil Engineering,Nanjing Forestry University ，Nanjing 210037，China

关键词:

含盐冻土; 冻结温度; 导热系数; 含盐量; 初始含水率

Keywords:

salty frozen soil; freezing temperature; thermal conductivity ;  salt content; initial moisture content

分类号:

TU445

DOI:

10.13705/j.issn.1671-6833.2022.04.021

文献标志码:

A

摘要:

为研究粉质黏土含盐量和初始含水率对热物理特性的影响规律,本文通过开展室内温度试验 测得不同含盐率和含水率粉质黏土的冻结温度和导热系数,分析了不同因素对含盐粉质黏土冻结温度 和导热系数的影响。结果表明：NaCl 含盐粉质黏土冻结温度及过冷温度随含盐率增加均呈线性降低， 而 Na2 SO4 含盐粉质黏土均先降低后略增加，两种含盐粉质黏土导热系数均随含盐率的增加而减小;冻 结温度及导热系数均与初始含水率成正相关关系,低于饱和含水率时含水率对冻结温度的影响占主导 作用,超过时含盐量成为主要影响因素,且随着含水率增加两种含盐土导热系数增加速率均变缓。同时 给出了不同条件下冻结温度和导热系数的经验公式,将水-盐-温度变量与冻结温度和导热系数建立起 联系,为含盐土壤分布地区工程建设提供参考。

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.

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