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| STUDY ON THE GROUND TEMPERATURE CHARACTERISTIC OF THE PLATEAV PERMAFROST UNDERLYING THE QINGHAI-TIBET RAILWAY EMBANKMENT |
| LI Zhong1, WANG Qi 2, SI Jian-feng1 |
| 1 School of Civil Engineering, Shijiazhuang Railway Institute; 2 Shijiazhuang Institute of Railway Technology |
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Abstract Research purpose: this paper analysed the ground temperature of the plateau permafrost underlying the Qinghai-Tibet railway embankment and analysed on its the thawing feature.
Research method: this paper is based on the measure dates for three years which have been taken from eight measure holes lain in the indicated that there are four features of the plateau permafrost.
Research conclusion: the paper are four points: the first the average ground temperature of the plateau permafrost underlying the railway embankment is much higher than that under the natural ground. The second is the thawing-layer forming at 0.5m-3.5m from the ground surface that controls the change of the plateau permafrost underlying the railway embankment. The third the decline of the upper limit of the plateau permafrost underlying the railway embankment would be stopped slowly as the heat existed in the railway embankment gradually lift. The last is obviously difference features in the ground temperature between the slope exposed to the sun and the shady slope.
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Received: 30 April 2005
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[1]徐学祖，王家澄，张立新.冻土物理学[M].北京:科学出版社， 2001.
[2] Olon. N. E, Synthentic insulation in arctic roadway embank- ments. Proceedings of the Third International Cold Region En- gineering Specialty Conference [J].Canadian Society of Civil En- gineering, 1984, (2):739-752.
[3]黄小铭.青藏高原多年冻土区铁路路堤临界高度的确定[A]. 第二届全国冻土学术会议论文集[C].兰州:甘肃人民出版 社，1996.
[4]吴紫汪，程国栋，朱林楠等.冻土路基工程[M].兰州:兰州大 学出版社，1988.
[5]何平，程国栋.饱和正冻土中的水、热、力场耦合模型[J].冰川 冻土，2000 , (2) :135-137.
[6]李萍，徐学祖.冻结缘何冻胀模型的研究现状与进展[J].冰 川冻土，2000, (3) :90-94.
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2005, Vol. 22 
