灌溉排水学报2017，Vol.36Issue(6)：69-73,5.DOI:10.13522/j.cnki.ggps.2017.06.013
渠道保温防冻胀中冻土层等效导热系数的计算
Calculating the Effective Thermal Conductivity Coefficient of the Frozen Layerin Thermal-conservative and Freezing-resistant Cannel
摘要
Abstract
Empirical methods commonly used for calculating the effective thermal conductivity coefficient of the frozen layer in thermal-conservative and freezing-resistant cannels could give rise to considerable errors. To over-come this problem, we proposed a fractal-based model in this paper to calculate effective thermal conductivity co-efficient of silty clay in permafrost in the cold region of northern China. We calculated the coefficient C using da-ta obtained from Ha Matong Irrigation District and then applied and tested the model against data obtained from-Hetao Irrigation District in Inner Mongolia, Chong Huer Irrigation District in Sinkiang, and Ha Matong Irrigation District in Heilongjiang. The results showed that the calculated thickness of polyphenyl plate was almost the same as the optimal thickness with an error of just 7.0%, proving the accuracy of the model. We also calculated the effective thermal conductivity coefficient of silt and silty clay in permafrost. The model can be used in re-gions where groundwater table is shallow and there is soil water movement when soils are freezing with pro-longed frost heaves.关键词
渠道防渗/保温防冻胀/分形理论/等效导热系数Key words
anti-seepage channels/heat preservation and frozen prevention/fractal theory/effective thermal con-ductivity coefficient分类
农业科技引用本文复制引用
张宇峰,何武全,赵彦琳..渠道保温防冻胀中冻土层等效导热系数的计算[J].灌溉排水学报,2017,36(6):69-73,5.基金项目
国家"十三五"重点研发计划课题(2016YFC0400203) （2016YFC0400203）
水利部科技推广计划项目(TG1214) （TG1214）
