NUMERICAL ANALYSIS OF TEMPERATURE FIELD IN SECTIONS OF VENTILATION SUBGRADE ON QINGHAI-TIBET RALWAY LINE
LIU ZHi-qing1, LAI Yuan-ming2
1.Xeric Environment in Cold Zone and Engineering Research Institute of the Chinese Academy of Science, State Key Frozen Soil Lab; 2.Mechanics Research Institute of Civil Engineering School of Lanzhou Jiaotong University
Abstract：Some segments of Qinghai-Tibet railway are used the ventilated embankment to ensure the thermal stability for it pass through cold region. The finite element formulate was derived from the differential equation of three-dimension temperature fields taking into phase change by enthalpy-based methods and calculate the temperature distribution of the ventilated embankment under the case that the annual mean air temperature in Qinghai-Tibetan Plateau will be warm up by 2.6℃in the future 54 years and the air yearly-average temperature is about -2. 3℃ or the yearly-average temperature at the native surface is about -1℃.And compare the traditional embankment to the ventilated embankment under the same situation mention above, the ventilated embankment structure can ensure the thermal stability of embankment.
刘志强，赖远明. 对青藏铁路部分路段通风路基温度场的数值分析[J]. 铁道工程学报, 2004, 21(1): 39-43.
LIU ZHi-qing, LAI Yuan-ming. NUMERICAL ANALYSIS OF TEMPERATURE FIELD IN SECTIONS OF VENTILATION SUBGRADE ON QINGHAI-TIBET RALWAY LINE. Journal of Railway Engineering Society, 2004, 21(1): 39-43.
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