Experimental study on application effects of thermal pipes along Chai-Mu Railway

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	Experimental study on application effects of thermal pipes along Chai-Mu Railway
	Yaling, Chou 1,2,3; Gongqi, Yang 1,2; Baoan, Li 1,2; Yu, Sheng 3
刊名	Electronic Journal of Geotechnical Engineering
	2014
卷号	19 期号:Z 页码:9623-9635
关键词	Cooling Embankments Exponential functions Frozen soils Permafrost Railroads Slope stability Temperature distribution Thawing Thermodynamic stability Transportation Engineering geological condition Engineering measures Freezing-thawing Negative exponential functions Permafrost environment Sunny-shady effect Thermal pipes Two-phase closed thermosyphon
英文摘要	Thermal pipe is a kind of two-phase closed thermosyphon in use of civil engineering, widely applied not only in large-scale linear engineering, such as highway, railway, but also airport and buildings in permafrost regions. Average annual air temperature, frozen soil type, engineering geological condition, permafrost environments as well as other local factors including sunny-shady slope effect are principal causes which have to be taken into account in order to accurately evaluate the cooling effect of thermal pipe. Through field data of observed cross-sections, the cooling effect of thermal pipe in permafrost regions was analyzed. The result indicates that thermal pipe revetment embankment has perfect effect on cooling the roadbed in permafrost regions. (1)There is a negative exponential function between ground temperature and the distance between thermal pipe and thermometer hole, and the regression equations were shown. Based on the different temperature standards, including the average annual temperature, the highest annual temperature and the lowest annual temperature, the cooling radii of thermal pipe are 2.4m, 0.5m and 4.5m, respectively. (2) In extremely high-temperature unstable permafrost regions and high-temperature unstable permafrost regions, although the typical sections are built on sloping wetlands, the engineering measure that the thermal pipes have stood in two ranks on sunny side and there is a row of pipes on shady side can uplift the artificial permafrost table of the whole embankment, and can reduce the permafrost temperature and the high-temperature permafrost layer. Meanwhile, this engineering measure has removed sunny-shady slope effect and enhanced thermal stability of the embankment. © 2014 ejge.
语种	英语
出版者	E-Journal of Geotechnical Engineering
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/113629]
专题	土木工程学院
作者单位	1.Northwest Center for Disaster Mitigation, Civil Engineering of Ministry of Education, Lanzhou, China; 2.Key Laboratory of Disaster Prevention and Mitigation, Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou, China; 3.State key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, China
推荐引用方式 GB/T 7714	Yaling, Chou,Gongqi, Yang,Baoan, Li,et al. Experimental study on application effects of thermal pipes along Chai-Mu Railway[J]. Electronic Journal of Geotechnical Engineering,2014,19(Z):9623-9635.
APA	Yaling, Chou,Gongqi, Yang,Baoan, Li,&Yu, Sheng.(2014).Experimental study on application effects of thermal pipes along Chai-Mu Railway.Electronic Journal of Geotechnical Engineering,19(Z),9623-9635.
MLA	Yaling, Chou,et al."Experimental study on application effects of thermal pipes along Chai-Mu Railway".Electronic Journal of Geotechnical Engineering 19.Z(2014):9623-9635.