Analysis on thermal stability and deformation stability of CMR

doi:10.1016/j.coldregions.2014.10.004

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Analysis on thermal stability and deformation stability of CMR
	Chou, Yaling 1,2; Sheng, Yu 3; Chen, Ji 3; Chen, Xingqiang 1,2
刊名	Cold Regions Science and Technology
	2015-02-01
卷号	110 页码:215-222
关键词	Cracks Deformation Engineering geology Permafrost Railroads Revetments Slope stability Thermodynamic stability Ventilation Chai-Mu Railway Deformation stability Engineering geological condition Engineering measures Permafrost engineering Permafrost environment Settlement deformation Shady-sunny slope
ISSN号	0165232X
DOI	10.1016/j.coldregions.2014.10.004
英文摘要	In permafrost regions, embankment stability has been destroyed with longitudinal cracks primarily caused by transverse asymmetric settlement. And shady-sunny slope effect is a principal factor which might result in embankment asymmetric settlement. Based on field data of some typical sections along the Chai-Mu Railway (simply called CMR) with obvious shady-sunny slopes, which is located on the Qinghai-Tibet Plateau, the ground temperature characteristics and settlement deformation properties of the embankment have been analyzed. This paper has studied how the different engineering measures, including rubble ventilation embankment, thermal pipe revetment embankment, rubble and thermal pipe revetment joint embankment, did influence the shady-sunny slope effect. The results show that: (1) Both thermal pipe revetment embankment and rubble ventilation embankment have perfect effect on cooling the roadbed in permafrost regions. However, for thermal pipe revetment embankment, the sunny-shady phenomenon and asymmetric settlement of embankment have been avoided if thermal pipe has been strengthened in sunny side. For rubble ventilation embankment, the sunny-shady effect has been hardly eliminated even though the rubble has been strengthened in sunny side. Although some composite embankments, such as the rubble and thermal pipe revetment joint embankment, have been successfully applied in the Qinghai-Tibet Railway, it is difficult to completely eliminate the sunny-shady slope problem along the CMR because of the complicated engineering geological conditions and the bad permafrost environments. (2) Along the CMR, in all common embankments - the observed results show that the settlement deformation is within 30. cm that is within the settlement standards of the National II Class Railway. Even the settlement deformation of thermal pipe subgrade and rubble ventilation embankment was able to meet the National I Class Railway standards - 20. cm. (3) On the basis of the above, some corresponding countermeasures and advice are proposed. First, rational use of the synthetic application of engineering measures must be taken. For example, let the structural mechanics measures and temperature controlled measures unify altogether to prevent longitudinal cracks. Second, the specific work conditions and details such as engineering geological condition, permafrost environments as well as other local factors including the slope orientation have to be taken into account in order to put forward rational engineering measures and accurate design parameters. Finally, it is essential to protect and to comprehensively evaluate the permafrost environment, which is the ultimate basis of permafrost engineering. © 2014 Elsevier B.V.
WOS研究方向	Engineering ; Geology
语种	英语
出版者	Elsevier B.V., Netherlands
WOS记录号	WOS:000349727200019
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150409]
专题	土木工程学院
作者单位	1.Northwest Center for Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou, Gansu; 730000, China; 2.Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou, Gansu; 730000, China; 3.State Key Laboratory of Natural Gansu, Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou, Gansu; 730000, China
推荐引用方式 GB/T 7714	Chou, Yaling,Sheng, Yu,Chen, Ji,et al. Analysis on thermal stability and deformation stability of CMR[J]. Cold Regions Science and Technology,2015,110:215-222.
APA	Chou, Yaling,Sheng, Yu,Chen, Ji,&Chen, Xingqiang.(2015).Analysis on thermal stability and deformation stability of CMR.Cold Regions Science and Technology,110,215-222.
MLA	Chou, Yaling,et al."Analysis on thermal stability and deformation stability of CMR".Cold Regions Science and Technology 110(2015):215-222.