Abstract：Research purposes: We matured the protecting of the permafrost in construction of the Qinghai － Tibet railway． We adopt some key technices at heat fense measure to roadbed，for example thermal probes，rubble revetment，and crushed rock embankment and so on． The paper researched the ground temperature of such roadbed new structure of Qinghai － Tibet Railway． Through calculating of the ground temperature we obtain corresponding the maximum thawed depth． Through comparative analysis of the maximum thawed depth， the paper researches the measure’s effect at protecting permafrost and the safety of the railway．
Research conclusions: The paper based on the analysis of the data concludes that the heat fense measure can minish maximum thawed depth under shoulder． The applying of the roadbed new structure can protect permafrost，debase ground temperature and make the roadbed stabilization．
牛东兴,李勇韩,龙武. 青藏铁路多年冻土区路基热防护工程效果分析[J]. 铁道工程学报, 2012, 29(3): 26-29.
NIU Dong － xing，LI Yong，HAN Long － wu. Analysis of Engineering Effect of Heat Safeguard in Permafrost Regions along Qinghai － Tibet Railway. 铁道工程学报, 2012, 29(3): 26-29.
Niu Dongxing，Niu Huaijun． The Discussion on Conveying and Conserving of Railway Subgrade in Permafrost Region of Qinghai － Tibet Plateau ［J］．Journal of Railway Engineering Society， 2008( 1) : 41 －47．
Research Report of Northwest Research Institute CO．LTD． ，of C． R． E． C． Experimental Study of the Thermal Pipe’s Apply in Permafrost Subgrade［R］．Lanzhou: Research Report of Northwest Research Institute CO． LTD． ，of C． R． E． C． February 2007: 9 －13．
Research Report of Northwest Research Institute Co．Ltd of CREC． Roadbed New Structure － Experimental Study of the Riprap Air Cooled Embankment ［R］．Lanzhou: Research Report of Northwest Research Institute Co． Ltd of CREC，2006．
Wu Qingbai，Liang Suyun，Gao Xingwang． Research of Convection Heat Tranfer Between Thermalpile and Air［J］． Journal of Glaciology and Geocryology， 1996( 1) :37 － 41．
2012, Vol. 29 
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