摘要
寒区公路隧道一般要受到季节性冻融冻胀作用的影响,因而不可避免地引起一系列的隧道病害问题,不仅影响隧道的正常使用,而且危及结构的长期运营安全性。结合寒区公路隧道气候特点,选择外敷保温材料作为隧道的抗防冻措施;采用相变温度场有限元模型,对不同材料及厚度保温材料性能进行对比分析,并采用现场跟踪测试手段,研究保温层施作后围岩及衬砌的温度场分布,对保温材料的性能进行现场验证,给出了合适的寒区隧道保温层材料及厚度。
Highway tunnel in cold region is generally influenced by freezing-thawing and frost-heave action. Disaster problems of tunnels are unavoidably induced,which will not only affect regular tunnel service,but also endanger long-term safety of tunnel. Based on climate characteristics of high-cold highway tunnel,outer insulating layer is selected as frost-resistant measures;and phase-change temperature field of finite element model is adopted to comparatively analyze the heat-insulating properties of different insulating materials and different thicknesses. In-situ test is used to verify the distribution of temperature field after insulating layer being considered;and performances of different insulating layers are also testified. Suitable insulating materials and corresponding thicknesses are provided for practical engineering.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2007年第S2期4395-4401,共7页
Chinese Journal of Rock Mechanics and Engineering
关键词
隧道工程
寒区公路隧道
保温层厚度
相变
温度场
tunneling engineering
highway tunnel in cold region
insulating layer thickness
phase-change
temperature field
