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Analysis of Temperature Field Characteristics in the Jiangluling Tunnel
(1 National Engineering Laboratory for Highway and Tunnel Construction Technology, Chongqing 400067； 2 China Merchants Chongqing Communications Technology Research & Design Institute Co. Ltd., Chongqing 400067； 3 Chengde Petroleum College, Chengde 067000)
Abstract There are few domestic reports and little literature about research on temperature field characteristics of long highway tunnels in the permafrost region, which stands over 4 000 m above sea level in the Tibetan Plateau. Therefore, a one-year field test was carried out for the inside and outside environmental temperature of the tunnel, surrounding rock, and support structure at the exit section of the Jiangluling Tunnel in Qinghai Province on the G214 National Road. Mathematical statistics were used to analyze and study the temperature variation regularity of the surrounding rock and lining structure within the scope in both the radial and longitudinal directions along the tunnel, and the environmental temperature inside and outside the tunnel was simulated and analyzed by a sine function regression method. The results show that: (1) the variation of the interrelationship of the temperature inside and outside the tunnel in permafrost regions is basically consistent with that of the longitudinal temperature distribution of the surrounding rock and lining structure in the tunnel; (2) the ridal an longitudinal temperature fields at measresment sections in tunnel are varing with the variation of the ambient temperature outside the tunnel; and(3) the radial variation range of the surrounding rock temperature of the tunnels in permafrost regions is at a depth of 2.7~3 m, but it is at a depth of 10m in the seasonally frozen regions.
Abstract：
There are few domestic reports and little literature about research on temperature field characteristics of long highway tunnels in the permafrost region, which stands over 4 000 m above sea level in the Tibetan Plateau. Therefore, a one-year field test was carried out for the inside and outside environmental temperature of the tunnel, surrounding rock, and support structure at the exit section of the Jiangluling Tunnel in Qinghai Province on the G214 National Road. Mathematical statistics were used to analyze and study the temperature variation regularity of the surrounding rock and lining structure within the scope in both the radial and longitudinal directions along the tunnel, and the environmental temperature inside and outside the tunnel was simulated and analyzed by a sine function regression method. The results show that: (1) the variation of the interrelationship of the temperature inside and outside the tunnel in permafrost regions is basically consistent with that of the longitudinal temperature distribution of the surrounding rock and lining structure in the tunnel; (2) the ridal an longitudinal temperature fields at measresment sections in tunnel are varing with the variation of the ambient temperature outside the tunnel; and(3) the radial variation range of the surrounding rock temperature of the tunnels in permafrost regions is at a depth of 2.7~3 m, but it is at a depth of 10m in the seasonally frozen regions.
DING Hao-1,
2 ,
LIU Rui-Quan-1 etc
.Analysis of Temperature Field Characteristics in the Jiangluling Tunnel[J] MODERN TUNNELLING TECHNOLOGY, 2015,V52(1): 76-81
2015, Vol. 52 