摘要
为了得到高地温铁路隧道最佳隔热层方案,首先对比分析不同隔热层敷设方式的优缺点,接着通过模糊评价法选取高地温隧道中最优隔热材料,最后通过数值模拟的方法确定高地温铁路隧道中隔热层的设置参数。研究结果表明:隔热材料宜选用硅酸盐质复合绝热卷毡或干法硅酸铝纤维板;隔热层敷设方式宜采用夹心式;隔热层导热系数越小越好,根据所选的隔热材料确定;隔热层厚度宜取5~10 cm。
This paper focuses on the optimization of heat insulation layer of the high ground temperature railwaytunnel.Firstly,the advantages and disadvantages of different laying modes of heat insulation layer were compared.Then,the optimum heat insulation materials in the high ground temperature tunnel were selected on the basis ofthe fuzzy evaluation method.Finally,the parameters of thermal insulation layer in the high ground temperaturerailway tunnel were determined by the numerical simulation method.The results show that it is more appropriateto choose silicate composite insulation blanket or aluminum silicate fibre board fabricated by dry method as theheat insulating method.The heat insulation layer should be used in the sandwich laying mode.The heat insulationlayer is better if its thermal conductivity is smaller,and the thermal conductivity coefficient is determinedaccording to the selected heat insulation material.The thickness of heat insulation layer should be5-10cm.
作者
吴根强
王志杰
WU Genqiang;WANG Zhijie(Zhejiang Provincial Institute of Communications Planning, Design & Research, Hangzhou 310006, China;Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China)
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2017年第8期1715-1727,共13页
Journal of Railway Science and Engineering
基金
中央高校基本科研业务费专项资金资助项目(SWJTU11ZT33)
教育部创新团队发展计划资助项目(IRT0955)
铁道部科技研究开发计划重大课题(2009.GD20-B)
交通运输部西部科技项目(2013318J13340)
关键词
铁路隧道
高地温
隔热层
模糊评价法
railway tunnel
high geo-temperature
heat insulation layer
fuzzy evaluation method
