岩土工程学报2011，Vol.33Issue(12)：1877-1886,10.
土壤热导率的温度效应试验和预测研究
Measurement and prediction of temperature effects of thermal conductivity of soils
摘要
Abstract
Currently,there is an extreme deficiency of complete data of thermal conductivity of soils under high temperature around the world,tests are thus conducted through KD2 Pro on the silty clay loam and fine sand within a wide range of temperatures（5℃～88℃） and water contents.The results indicate that the thermal conductivity under 88℃ is 3 or 4 times as high as that under 5℃ due to the latent heat transfer effect caused by condensation and evaporation of vapor.The critical water content,which depends on texture,exists as thermal conductivity changes with the water content.According to the verification and comparison of de V-1 and Campbell theoretical models from de Vries＇s hypothesis,improvements are needed on some parameters and the applicability of achieving them in the references.However,the modified models can comparatively better predict the change of the thermal conductivity under different temperatures（RMSE30%）.The closer to 40℃,the lower the error.It is suggested that a mass transfer enhancement factor of ζ2.5 should be multiplied under 58℃～88℃ within θAWC～θPWP for silty clay loam.Judged by the complexity of these two models,the more convenient empirical models are expected to be established based on this foundation.关键词
土壤/热导率/温度/预测Key words
soil/thermal conductivity/temperature/prediction分类
建筑与水利引用本文复制引用
刘晨晖,周东,吴恒..土壤热导率的温度效应试验和预测研究[J].岩土工程学报,2011,33(12):1877-1886,10.基金项目
国家自然科学基金项目 （）
广西自然科学基金项目 （）
