含水量对土体导热系数的影响

李顺群; 吴琼; 张翻; 李丽君

doi:10.13204/j.gyjzG20070106

含水量对土体导热系数的影响

doi: 10.13204/j.gyjzG20070106

天津城建大学土木工程学院, 天津 300384

基金项目:

国家自然科学基金项目（41877251）；天津市重点研发计划科技支撑重点项目（19YFZCSF00820）。

详细信息

作者简介:
李顺群,男,1971年出生,博士,教授,博士生导师。

通讯作者:
吴琼,女,1996年出生,硕士,786251329@qq.com。

计量
- 文章访问数: 76
- HTML全文浏览量: 6
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2020-07-01
- 网络出版日期: 2022-01-11

INFLUENCES OF THE WATER CONTENT ON SOIL THERMAL CONDUCTIVITY COEFFICIENTS

School of Civil Engineering, Tianjin Chengjian University, Tianjin 300384, China

摘要

摘要: 基于试验得到了土骨架的导热系数。结合土颗粒矿物与孔隙水相互作用的微观机理，对孔隙水含量对冻土导热系数的影响进行分析。随着孔隙水含量的增大，土体导热系数变化曲线将出现两个特征点，分别为"土结构控制点"和"土结构离散点"。这两个变化特征点将导热系数变化曲线分为三个阶段：1）土骨架与强结合水结合阶段；2）孔隙水填充土孔隙阶段；3）孔隙水破坏土骨架阶段。在此基础上利用传热物理模型研究土体导热系数在这三个阶段的变化规律，并基于电晶格模型理论得到简便实用的导热系数计算式。
- 含水量 /
- 导热系数 /
- 冻土 /
- 传热物理模型
Abstract: Based on the thermal conductivity coefficients of soil skeletons obtained by experiments and the microscopic mechanism of interaction between soil particles and pore water, the influence of the pore water content on thermal conductivity coefficients of frozen soil was analyzed. With the increase of the pore water content, the two characteristic points would appear in the curve of soil thermal conductivity coefficients, they were called "the soil structure control point" and "the soil structure dispersion point" respectively. The curve of thermal conductivity coefficients could be divided into three phases by the two varible characteristics points:1) the combination phase of soil skeletons and strong binding water; 2) the phase of water-filled pores of soil; 3) the phase of soil skeletons damaged by pore water. On the basis, the change laws of soil thermal conductivity in these three stages were studied by using the physical model of heat transfer, and the simple and practical formula of thermal conductivity coefficients was obtained based on the theory of the electric lattice model.
- water content /
- thermal conductivity coefficient /
- frozen soil /
- physical model of heat transfer

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参考文献(15)

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