AN OPEN ACCESS JOURNAL
 JJCE Submission Home


Numerical Investigation Of The Temperature Field Of Freeze-proof Separate Lining In A Cold - Region Tunnel

Submitted2015-08-06
Last Update2015-10-10
TitleNumerical Investigation Of The Temperature Field Of Freeze-proof Separate Lining In A Cold - Region Tunnel
Author(s)Author #1
Author title:
Name: J.X. Lai
Org: Assistant Professor, Shaanxi Provincial Major Laboratory for Highways, Bridges and Tunnels, Chang�an University, Xi�an 710064 China
Country:
Email: 373159626@qq.com

Author #2
Author title:
Name: H.B. Fan
Org: PhD candidate, School of Highway, Chang�an University, Xi�an 710064 China
Country:
Email:

Author #3
Author title:
Name: W.W. Dong
Org: Postgraduate, School of Highway, Chang�an University, Xi�an 710064 China
Country:
Email:

Author #4
Author title:
Name: Q. Liu
Org: Postgraduate, School of Highway, Chang�an University, Xi�an 710064 China
Country:
Email:

Other Author(s)
Contact AuthorAuthor #1
Alt Email: 373159626@qq.com
Telephone:
KeywordsTunnels in cold regions, Separate lining, ANSYS, Temperature field, Ventilation temperature, Insulating layer
AbstractTo analyze the temperature field of freeze-proof separate lining in cold-region tunnels, based on a tunnel on national highway number 307, the numerical model was established by the finite element software ANSYS, combined with the heat transfer theory using a cylindrical coordinate system. The change law of temperature field of the separate lining was investigated when the ventilation temperatures were -5℃, -10℃ and -15℃. The heat insulation effect of separate lining was also analyzed when the diameters of holes in the insulating layer were 5 mm, 10 mm and 15 mm, respectively. The results show that the temperature of lining and rock masses decreases gradually with the decrease of ventilation temperature and that the maximum temperature difference occurs in a closed air layer; considering that the temperature is still above 0℃. When the ventilation temperature is -15℃, the separate lining structure can protect the tunnel from freezing damage. The temperature field of the lining changes significantly if the diameters of holes in the insulating layer are large; the temperature of rock masses is -8.5℃ when the diameter is 15 mm, and the structure of the tunnel may suffer freezing damage. The tightness of the insulation layer has significant influence on the heat insulation effect of separate lining.
Paperview paper 3122.pdf (296KB)

http://www.just.edu.jo