Tunnel temperature fields analysis under the couple effect of convection-conduction in cold regions

Temperature is an important factor in designing and maintaining tunnels, especially in cold regions. We present three-dimensional numerical simulations of tunnel temperature fields at different temperature conditions. We study the tunnel temperature field in two different conditions with relatively low and high ambient temperatures representing winter and summer of northeast China. We specifically study how these temperature conditions affect tunnel temperature and its migration to surrounding rocks. We show how placing an insulation layer could affect the temperature distribution within and around tunnels. Our results show that the temperature field without using an insulation layer is closer to the air temperature in the tunnel, and that the insulation layer has shielding effects and could plays an important role in preventing temperature migration to surrounding rocks. We further analyzed how thermal conductivity and thickness of insulation layer control the temperature distribution. The thermal conductivity and thickness of insulation layer only affect the temperature of the surrounding rocks which are located at distances below ~20 m from the lining.

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Approximate analytical solution for temperature fields in cold regions circular tunnels

Cold Regions Science and Technology ◽

10.1016/s0165-232x(01)00050-7 ◽

2002 ◽

Vol 34 (1) ◽

pp. 43-49 ◽

Cited By ~ 28

Author(s):

Lai Yuanming ◽

Liu Songyu ◽

Wu Ziwang ◽

Yu Wenbing

Keyword(s):

Analytical Solution ◽

Approximate Analytical Solution ◽

Temperature Fields ◽

Cold Regions

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Numerical analysis for random temperature fields of embankment in cold regions

Science in China Series D Earth Sciences ◽

10.1007/s11430-007-2043-z ◽

2007 ◽

Vol 50 (3) ◽

pp. 404-410 ◽

Cited By ~ 13

Author(s):

ZhiQiang Liu ◽

Lai YuanMing ◽

MingYi Zhang ◽

XueFu Zhang

Keyword(s):

Numerical Analysis ◽

Temperature Fields ◽

Cold Regions

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Random temperature fields of embankment in cold regions

Cold Regions Science and Technology ◽

10.1016/j.coldregions.2006.02.001 ◽

2006 ◽

Vol 45 (2) ◽

pp. 76-82 ◽

Cited By ~ 12

Author(s):

Zhiqiang Liu ◽

Yuanming Lai ◽

Xuefu Zhang ◽

Mingyi Zhang

Keyword(s):

Temperature Fields ◽

Cold Regions

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EFFECT OF CLIMATIC WARMING ON THE TEMPERATURE FIELDS OF EMBANKMENTS IN COLD REGIONS AND A COUNTERMEASURE

Numerical Heat Transfer Part A Applications ◽

10.1081/10407780390244407 ◽

2004 ◽

Vol 45 (2) ◽

pp. 191-210 ◽

Cited By ~ 11

Author(s):

Lai Yuanming ◽

Zhang Shujuan ◽

Mi Long

Keyword(s):

Temperature Fields ◽

Climatic Warming ◽

Cold Regions

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The growth of mica polytypes as studied by conventional and high-resolution TEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100074690 ◽

1983 ◽

Vol 41 ◽

pp. 174-177

Author(s):

A. Baronnet ◽

M. Amouric

Keyword(s):

Water Pressure ◽

Point Of View ◽

Temperature Fields ◽

Natural Occurrence ◽

Growth Mechanisms ◽

Long Period ◽

High Resolution Tem ◽

Layer Stacking ◽

Experimental Works ◽

Potential Use

The origin of mica polytypes has long been a challenging problem for crystal- lographers, mineralogists and petrologists. From the petrological point of view, interest in this field arose from the potential use of layer stacking data to furnish further informations about equilibrium and/or kinetic conditions prevailing during the crystallization of the widespread mica-bearing rocks. From the compilation of previous experimental works dealing with the occurrence domains of the various mica "polymorphs" (1Mr, 1M, 2M1, 2M2 and 3T) within water-pressure vs temperature fields, it became clear that most of these modifications should be considered as metastable for a fixed mica species. Furthermore, the natural occurrence of long-period (or complex) polytypes could not be accounted for by phase considerations. This highlighted the need of a more detailed kinetic approach of the problem and, in particular, of the role growth mechanisms of basal faces could play in this crystallographic phenomenon.

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