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《Journal of Glaciology and Geocryology》 2005-01
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3-D Numerical Analyses of Temperature Fields of Ventilated Embankment with Insulated Doors

LIU Zhi-qiang~(1,2), LAI Yuan-ming~(1) (1.State Key Laboratory of Frozen Soil Engineering, CAREERI, CAS, Lanzhou Gansu 730000, China; 2.Lanzhou JiaoTong University, Lanzhou Gansu 730070, China)  
Finite element formulae are derived by Galerkin’s method from the differential equation of three-dimension temperature fields, taking account of phase change. The temperature distributions of ventilated embankments are calculated under the case that the annual mean air temperature in the Tibetan Plateau will increase 2^6 ℃ in the future 50 years and the yearly-average temperature at the native surface will be {-1} ℃. The calculation results for ventilated embankments with and without insulated doors are analyzed and compared. The ventilated embankment with insulated doors can efficiently decrease the temperature in embankment, 0^5~1 ℃ lower than that of ventilated embankment without insulated doors. The zones below 0 ℃ in ventilated embankment with insulated doors are larger than those without doors. It is revealed that an embankment with insulated doors absorbs less heat than that without insulated doors. As a result, it may provide more thermal stability of the embankment, and guarantee the railway safer operation. Finally, an advice to the design department is suggested based on the analyses.
【Fund】: 国家杰出青年科学基金项目(40225001);; 中国科学院“百人计划”资助项目;; 中国科学院知识创新工程重大项目(KZCX1 SW 04);; 中国科学院全国百篇优秀博士论文专项资金项目资助
【CateGory Index】: U213.1;U416.1
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