Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 41301071 |
| 多年冻土区工程路面附面层形成的物理机制 | |
| 张中琼 | |
| 主持机构 | 中国科学院寒区旱区环境与工程研究所 |
| 开始日期 | 2014 |
| 结束日期 | 2016 |
| 资助经费 | 290000(CNY) |
| 项目类别 | 青年科学基金项目 |
| 资助机构 | CN-NSFC（国家自然科学基金） |
| 语种 | 中文 |
| 国家 | 中国 |
| 英文简介 | A discontinuous layer about changes of temperature and humidity is present between the atmosphere and permafrost, and it is termed the boundary layer. Physical processes in this layer affect the analysis of the thermal stability of embankment and accurate prediction of permafrost. The physical processes within the layer are different for different engineering pavements, and the difference is relatively large. Therefore, the common form of engineering pavement in permafrost regions (asphalt and gravel pavement) is chosen to carry out the in situ measurement of the boundary layer's physical characteristics. The continuous monitoring data in terms of meteorology, radiation, hydro-thermal field will be obtained. On this basis, the quantitative criteria of the boundary layer's thickness will be determined by the boundary layer theory and the magnitude of ground temperature changes. Later, the engineering road boundary layer's thickness will also be calculated; surface temperature offset and the time of the ground temperature lagging behind the pavement temperature will be counted. The relationship between the ground and air temperature will be established by simple harmonic theory. Variation of atmospheric stratification caused by temperature changes will be analyzed. Radiation and energy balance characteristics of engineering pavement are calculated using the aerodynamic method to illustrate the heat storage's differences of the two engineering pavements. Shallow ground temperature changes and moisture cumulative process caused by moisture-vapor migration will be analyzed, and the hydro-thermal change process of boundary layer is discussed. Finally, the physical mechanisms and their differences of engineering boundary layer formed will be elaborated. |
| 中文关键词 | 工程与环境相互作用 ; 多年冻土 ; 工程路面 ; 附面层 |
| 来源机构 | 中国科学院西北生态环境资源研究院 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/346607 |
| 推荐引用方式 GB/T 7714 | 张中琼.多年冻土区工程路面附面层形成的物理机制.2014. |
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