| 青藏铁路通风路基边界条件研究 |
| |
| 引用本文： | 全晓娟,李宁,苏波,李国玉.青藏铁路通风路基边界条件研究[J].冰川冻土,2004,26(Z1):115-120. |
| |
| 作者姓名： | 全晓娟 李宁 苏波 李国玉 |
| |
| 作者单位： | State Key Laboratory of Frozen Soil Engineering, CAREERI, CAS, Lanzhou Gansu 730000, China,State Key Laboratory of Frozen Soil Engineering, CAREERI, CAS, Lanzhou Gansu 730000, China;Geotechnology Institute of Xi'an University of Technology, Xi'an Shaanxi 710048, China |
| |
| 摘 要： | In permafrost regions, many methods about active cooling embankment are put forward, one of these representations is ventilated embankment, its cooling effect is the result of the air convection in the duct, and this leads to reducing the annual average ground temperature. The present work in this article is to determine the boundary conditions of the ventilated embankment and natural ground in numerical work. There are several effects which influence boundary conditions, they are: radiation, evaporation,phase change, convection and embankment material etc. Radiation and convection are the main effects in those. We mainly consider sun radiation in this article. The added-surface effect in ventilated embankment lowers its temperature, so the temperature on the wall of the ventilated embankment is different from the temperature in atmosphere. There are two methods in determining the surface temperature, experimental method and experiential method. Detailed research is discussed in the article.
|
| 关 键 词： | boundary conditions ventilated embankment radiation added-surface effect surface temperature 青藏铁路 通风路基 边界 条件研究 Railway Ventilated Embankment Boundary Conditions research the article experimental method surface temperature wall different atmosphere effects convection material phase evaporation |
Research on Boundary Conditions in Ventilated Embankment in Qinghai-Tibet Railway |
| |
| QUAN Xiao-juan,LI Ning,SU Bo,LI Guo-yu.Research on Boundary Conditions in Ventilated Embankment in Qinghai-Tibet Railway[J].Journal of Glaciology and Geocryology,2004,26(Z1):115-120. |
| |
| Authors: | QUAN Xiao-juan LI Ning SU Bo LI Guo-yu |
| |
| Abstract: | In permafrost regions, many methods about active cooling embankment are put forward, one of these representations is ventilated embankment, its cooling effect is the result of the air convection in the duct, and this leads to reducing the annual average ground temperature. The present work in this article is to determine the boundary conditions of the ventilated embankment and natural ground in numerical work. There are several effects which influence boundary conditions, they are: radiation, evaporation,phase change, convection and embankment material etc. Radiation and convection are the main effects in those. We mainly consider sun radiation in this article. The added-surface effect in ventilated embankment lowers its temperature, so the temperature on the wall of the ventilated embankment is different from the temperature in atmosphere. There are two methods in determining the surface temperature, experimental method and experiential method. Detailed research is discussed in the article. |
| |
| Keywords: | boundary conditions ventilated embankment radiation added-surface effect surface temperature |
| 本文献已被 万方数据 等数据库收录！ |
|
