铁道标准设计2019，Vol.63Issue(1)：34-39,6.DOI:10.13238/j.issn.1004-2954.201802280005
机械式制冷热管对多年冻土的制冷效果研究
Research on Cooling Effect of Mechanical Cooling Thermosyphon in Permafrost
摘要
Abstract
Subgrade protection technologies in permafrost regions are the focus of long-term researches for frozen soil scientists. The cooling effects of the new mechanical coolingthermosyphon ( NMCT) and the ordinary two-phase closed thermosyphon ( TPCT) are compared and analyzed based on field tests. The results show that: (1) The NMCT can make up for the deficiencies of the ordinary TPCT during warm seasons and take away the caloric from the active layer. In addition, it can increase the cold storage capacity and effectively protect the permafrost in both the warm and cold seasons. (2) In the cold and warm seasons, the temperature of the NMCT is lower than the that of the ordinary TPCT by 2. 77 to 0. 39 ℃ and 1. 22 to 0. 13 ℃ respectively in active layers; 3. 24 to 0. 52 ℃and 0. 55 to 0. 12 ℃ in permafrost layers. The annual average temperature of the NMCT is lower than the annual average temperature of the ordinary TPCT by 0. 74 ℃ in both active layers and permafrost layers. (3) The accumulated temperature of the NMCT is 1. 4 times to 2. 1 times in the warm seasons and1. 4 times to 1. 8 times in the cold seasons as much as that of the ordinary TPCT, and the former is1. 9 times the latter in a whole year. The research results can provide theoretical basis for the application of the NMCT technology in permafrost thermal stability maintenance.关键词
多年冻土/机械式制冷热管/热管/制冷效果/地温/冻土上限/现场试验Key words
Permafrost/Mechanical cooling thermosyphon/Two-phase closed thermosyphon/Cooling effect/Soil temperature/Permafrost table/Field test分类
建筑与水利引用本文复制引用
赵永虎,崔雍,米维军,韩龙武,熊治文..机械式制冷热管对多年冻土的制冷效果研究[J].铁道标准设计,2019,63(1):34-39,6.基金项目
中国中铁股份有限公司科技开发计划(2015-重大-3,2013-重大-25) （2015-重大-3,2013-重大-25）
