岩土力学2017，Vol.38Issue(3)：656-662,7.DOI:10.16285/j.rsm.2017.03.006
含水率和干密度对黄土热参数影响的试验研究
Effect of moisture content and dry density on thermal parameters of loess
摘要
Abstract
The thermal parameters of loess are the important indexes in the study of loess disaster and thermal calculation,while the water content and dry density have a certain influence on the parameters.Thermal parameters of loess samples with different dry densities and different moisture contents are tested in normal temperature by using thermal constant analyzer Test Protocol Hot Disk TPS 2500S to explore the variations of thermal parameters of loess which are influenced by moisture contents and dry densities.The study reveals that:with a constant moisture content of the loess samples,the higher the dry density is,the greater the thermal conductivity,the specific heat capacity and the thermal diffusivity are.The thermal conductivity and specific heat capacity of loess samples increase linearly with the increase of moisture contents.When the moisture content is low,the thermal diffusivity increases with the increase of moisture content.When a certain moisture content is reached,the thermal diffusivity decreases with the increase of the moisture content.The thermal diffusivity tends to be stabilized with the continual increase of the moisture content of loess samples.The impact on the thermal parameters by the moisture content of loess is greater than that by the dry density of loess.In thermal engineering calculation,thermal parameters can be dynamically selected in accordance with soil moisture.关键词
黄土/热参数/含水率/干密度/导热系数/比热容/热扩散系数Key words
loess/thermal parameter/moisture content/dry density/thermal conductivity/specific heat capacity/thermal diffusivity分类
建筑与水利引用本文复制引用
叶万军,董西好,杨更社,陈强,彭瑞奇,刘宽..含水率和干密度对黄土热参数影响的试验研究[J].岩土力学,2017,38(3):656-662,7.基金项目
国家自然科学基金项目(No.41672305,No.41172262) （No.41672305,No.41172262）
陕西省青年科技新星项目(No.KJXX-37) （No.KJXX-37）
陕西省重点科技创新团队计划(No.2014KCT-30).This work was supported by Chinese National Natural Science Foundation (41672305,41172262),the Youth Star Project of Science and Technology in Shaanxi Province (KJXX-37) and the Key Technology Innovation Team in Shaanxi Province (2014KCT-30). （No.2014KCT-30）
