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开放表面透壁通风管路堤碎石的降温机理分析

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Keywords: 道路工程,路堤碎石,室内模拟试验,透壁通风管,开放表面,降温机理

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Abstract:

?为揭示青藏高原冻土区采用的透壁通风管增强开放边界路堤碎石的降温机理,对埋设水平透壁通风管的100cm×60cm×100cm碎石试样进行了室内试验。结果表明:透壁通风管开放路堤碎石存在4种传热过程,即通风管的管壁与管内流动空气的对流换热,外界大气通过路堤碎石开放边界与其内部孔隙空气循环引起的强迫对流换热,管内流动空气通过管壁的透气小孔与附近碎石层内的孔隙空气循环引起的强迫对流换热及路堤表面的热传导换热;当通风期间进入透壁通风管内的空气温度低于通风管周围碎石区域的温度时,路堤碎石通过开放边界及管壁透气小孔使外界冷空气与路堤碎石层内孔隙空气形成的循环运动能增强路堤碎石冬季冷空气引起的降温效果。

References

[1]  CHENG Guo-dong,SUN Zhi-zhong,NIU Fu-jun.Application of the Roadbed Cooling Approach in Qinghai-Tibet Railway Engineering[J].Cold Regions Science and Technology,2008,53(3):241-258.
[2]  MA Wei,FENG Guang-li,WU Qing-bai,et al.Analyses of Temperature Fields Under the Embankment with Crushed-rock Structures Along the Qinghai-Tibet Railway[J].Cold Regions Science and Tech-nology,2008,53(3):259-270.
[3]  LAI Yuan-ming,GUO Hong-xin,DONG Yuan-hong.Laboratory Investigation on the Cooling Effect of the Embankment with L-shaped Thermosyphon and Crushed-rock Revetment in Permafrost Regions[J].Cold Regions Science and Technology,2009,58(3):143-150.
[4]  WU Qing-bai,CHENG Hong-bin,JIANG Guan-li.Cooling Mechanism of Embankment with Block Stone Interlayer in Qinghai-Tibet Railway[J].Science in China Series E:Technological Sciences,2007,50(3):319-328.
[5]  SUN Bin-xiang,YANG Li-jun,XU Xue-zu.Onset and Evaluation on Winter-time Natural Convection Cooling Effectiveness of Crushed-rock Highway Embankment[J].Cold Regions Science and Technology,2007,48(3):218-231.
[6]  LI Guo-yu,LI Ning,KANG Jia-mei.Preliminary Study on Cooling Effect Mechanisms of Qinghai-Tibet Railway Embankment with Open Crushed-stone Side Slope in Permafrost Regions[J].Cold Regions Science and Technology,2006,45(3):193-201.
[7]  GOERING D J.Passively Cooled Railway Embankments for Use in Permafrost Areas[J].Journal of Cold Regions Engineering,2003,17(3):119-133.
[8]  李 宁,苏 波,全晓娟,等.冻土通风管路基的温度场分析与设计原则探讨[J].土木工程学报,2005,38(2):81-86.
[9]  NIU Fu-jun,CHENG Guo-dong,XIA Hui-min,et al.Field Experiment Study on Effects of Duct-ventilated Railway Embankment on Protecting the Underlying Permafrost[J].Cold Regions Science and Technol-ogy,2006,45(3):178-192.
[10]  YU Qi-hao,NIU Fu-jun,PAN Xi-cai,et al.Investigation of Embankment with Temperature-controlled Ventilation Along the Qinghai-Tibet Railway[J].Cold Regions Science and Technology,2008,53(2):193-199.
[11]  HU Ming-jian,WANG Ren,GE Xiu-run,et al.An Experimental Study on Cooling Effect of the Perfor-ated Ventilation Pipes on Qinghai Tibet Railway Roadbed[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(24):4195-4199.
[12]  LIU Qi,SUN Bin-xiang,XU Xue-zu,et al.Investigation of Laboratory Tests on Cooling Effect of Embankments with Perforated Ventilation Pipes[J].Chinese Journal of Geotechnical Engineering,2006,28(9):1153-1158.
[13]  YANG Li-jun,SUN Bin-xiang,WANG Wei,et al.Natural Ventilation Characteristics of Ventilation Pipe in Ventilated Embankment in Permafrost Regions[J].China Journal of Highway and Transport,2008,21(4):25-29.
[14]  DONG Yuan-hong,LAI Yuan-ming,LI Jing-bo,et al.Laboratory Investigation on the Cooling Effect of Crushed-rock Interlayer Embankment with Venti-lated Ducts in Permafrost Regions[J].Cold Regions Science and Technology,2010,61(2/3):136-142.
[15]  MA Wei,SHI Cong-hui,WU Qing-bai,et al.Moni-toring Study on Technology of the Cooling Roadbed in Permafrost Region of Qinghai-Tibet Plateau[J].Cold Regions Science and Technology,2006,44(1):1-11.
[16]  LAI Yuan-ming,MA Wei-dong,ZHANG Ming-yi,et al.Experimental Investigation on Influence of Boundary Conditions on Cooling Effect and Mech-anism of Crushed-rock Layers[J].Cold Regions Science and Technology,2006,45(2):114-121.
[17]  WU Qing-bai,LU Zi-jian,ZHANG Ting-jun,et al.Analysis of Cooling Effect of Crushed Rock-based Embankment of the Qinghai-Xizang Railway[J].Cold Regions Science and Technology,2008,53(3):271-282.
[18]  SUN Bin-xiang,XU Xue-zu,LAI Yuan-ming,et al.Evaluation of Fractured Rock Layer Heights in Ballast Railway Embankment Based on Cooling Effect of Natural Convection in Cold Regions[J].Cold Regions Science and Technology,2005,42(2):120-144.
[19]  ZHANG Ming-yi,LAI Yuan-ming,YU Wen-bing,et al.Experimental Study on Influence of Particle Size on Cooling Effect of Crushed-rock Layer Under Closed and Open Tops[J].Cold Regions Science and Technology,2007,48(3):232-238.
[20]  XU J F,GOERING D J.Experimental Validation of Passive Permafrost Cooling Systems[J].Cold Regions Science and Technology,2008,53(3):283-297.
[21]  JORGENSEN A S,DORE G,VOYER E,et al.Optimization of the Characteristics of Two Heat Removal Techniques for Permafrost Protection[J].Cold Regions Science and Technology,2008,53(2):179-192.
[22]  LI Ning,SU Bo,QUAN Xiao-juan,et al.Approach on Temperature Field Analysis and Design Principle of Bed for Ventilating Pipeline in Frozen Soil[J].China Civil Engineering Journal,2005,38(2):81-86.
[23]  NIU Fu-jun,LIU Xing-fu,MA Wei,et al.Monitoring Study on the Boundary Thermal Conditions of Duct-ventilated Embankment in Permafrost Regions[J].Cold Regions Science and Technology,2008,53(3):305-316.
[24]  胡明鉴,汪 稔,葛修润,等.透壁通风管对青藏铁路路基的冷却效果试验初探[J].岩石力学与工程学报,2004,23(24):4195-4199.
[25]  刘 琦,孙斌祥,徐学祖,等.透壁通风管路堤降温效应的室内试验研究[J].岩土工程学报,2006,28(9):1153-1158.
[26]  杨丽君,孙斌祥,王 伟,等.寒区路堤通风管的自然通风能力研究[J].中国公路学报,2008,21(4):25-29.
[27]  DONG Yuan-hong,LAI Yuan-ming,XU Xiang-tian,et al.Using Perforated Ventilation Ducts to Enhance the Cooling Effect of Crushed-rock Interlayer on Embankments in Permafrost Regions[J].Cold Regions Science and Technology,2010,62(1):76-82.

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