对青藏铁路部分路段通风路基温度场的数值分析

刘志强; 赖远明

PDF(285 KB)

铁道工程学报 ›› 2004, Vol. 21 ›› Issue (1) : 39-43.

路网研究

对青藏铁路部分路段通风路基温度场的数值分析

刘志强1，赖远明2

作者信息 +

NUMERICAL ANALYSIS OF TEMPERATURE FIELD IN SECTIONS OF VENTILATION SUBGRADE ON QINGHAI-TIBET RALWAY LINE

LIU ZHi-qing1, LAI Yuan-ming2

Author information +

文章历史 +

摘要

青藏铁路穿越部分冻土路段，为保护冻土的热稳定性，部分路段采用了通风路基。本文焓法处理带相变的瞬态温度场问题，推导了其有限元格式。对青藏铁路中年平均气温在-4.3℃，地表年平均温度-1℃的路段应用通风路基，未来50年，在气温上升2.6 ℃的条件下，对通风路基的三维温度场进行了数值计算。并和普通的填土路基温度场进行了对比分析。认为在青藏铁路部分路段应用通风路基以增强其热稳定性是有效的。

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.

导出引用

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[J]. Journal of Railway Engineering Society, 2004, 21(1): 39-43

中图分类号： U231. 1

参考文献

[1] Tamma. Kumar K. and Namburu, Raju R.，1990. Recent Advances, Trends and New Perspectives Via Enthalpy-Based Finite Element Formulations far Applications to Solidification Problems, International Journal for Numerical Methods in Engineering. Vol. 30,pp.803-820.

[2] Bonacina. C.，Comini, G.，Fasano, et al.，1973. Numerical solution of phase-change problems. International Journal of Heat and Mass Transfer 16.

[3] LAI Yuanming, Zhang Luxin, Zhang Shujuan, 2003. Cooling effect of ripped-stone embankments on Qinghai-Tibet railway under climatic warming s Chinese Science Bulletin (SCI)，No. 3,Vol. 48.

[4] LAI Yunming，2002. Nonlinear Analuses for the stress and temperature fields of special embankments. A post-doctor research report， Southeast University.

[5] Qin，D. H.，The Comprehensive Evaluating Report on the Environment Evolvement in West China，Beijing: Science Press，2002,57-58.

[6] Zhang Xufu, Lai Yuanming, Yu Wenbing， Zhang Shujuan，2002. Nonliner analysis for the three-dimensional temperature fields in cold region tunnels. Cold Region Science and Technology 35，207-219.