对青藏铁路部分路段通风路基温度场的数值分析

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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.

Key words： Qinghai-Tibet railway frozen soil three-dimensional temperature numerical analysis enthalpy

Received: 18 January 2014

PACS:

U231. 1

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	LIU ZHi-qing
	LAI Yuan-ming

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LIU ZHi-qing,LAI Yuan-ming. NUMERICAL ANALYSIS OF TEMPERATURE FIELD IN SECTIONS OF VENTILATION SUBGRADE ON QINGHAI-TIBET RALWAY LINE[J]. Journal of Railway Engineering Society, 2004, 21(1): 39-43.

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http://tdgcxb.crec.cn/EN/ OR http://tdgcxb.crec.cn/EN/Y2004/V21/I1/39

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