摘要
以青藏铁路五道梁片石路基为研究实例,分析了片石层的工作原理,并与一般路基不同位置处的地温进行了比较,认为片石路基有利于保护冻土地温.在考虑空气对流作用的前提下,对五道梁片石路基进行了地温预测,结果表明,在预测前30年还能有效地保护冻土,而50年后其人为上限出现下凹形态.
The principle of the cooling effect of the ballast embankment is introduced in this paper, and the temperatures at different positions of the ballast embankment are compared with those of the ordinary embankment. It is found that the thermal field of ballast embankment is comparatively stable in Wudaoliang area. Considering the effect of air convection, the temperature of Wudaoliang 50 years is forecasted, which indicates that the thermal field can be protected effectively in years, but Artificial permafrost table will sink in next 50 years. the next e first 30 years, but Artificial permafrost table will sink in next 50 years.
出处
《北京交通大学学报》
EI
CAS
CSCD
北大核心
2008年第4期98-102,共5页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
北京交通大学人才基金资助项目(2007RC089)
关键词
路基
青藏铁路
片石路基
强迫对流
致冷效果
embankments
Qinghai-Tibet railway
ballast embankment
forced convection
cooling effect
