摘要
为了揭示隧道温度场的变化规律,以某寒冷地区公路隧道为依托,选择11个测试断面,对隧道拱顶、拱腰、边墙和路面四个部位的温度进行1.5a的长期测试,采用正弦函数回归法,对测试数据进行分析。结果表明:隧道洞内的年气温变化具有周期性,随时间大致呈正弦曲线变化;隧道内纵向气温随着进入隧道距离的增大,年平均温度逐渐下降,年温度振幅也下降,其变化规律呈指数函数曲线变化关系;隧道围岩温度在径向一定范围内,随着径向深度的增加,年平均温度上升,年温度振幅衰减,并且呈指数函数曲线变化关系;防水夹层对隧道保温隔热是有利的。
In order to discove the variation rules of tunnel temperature field, eleven sections of a highway tunnel in cold area were chosen, four positions were confirmed including crown, shoulder, wall and road face, their temperatures were tested in 1. 5 a, and test data were analyzed by using mathematical statistic-sine function regression method. The result shows that the variation rule of yearly temperature in tunnel was periodical, basically accords with sine curve; vertical yearly temperature and shake amplitude decrease gradually with the increase of the distance entering into tunnel, and the changing rule was exponent curve; the relation between yearly temperature and radial depth was also exponent curve with in certain area, radial yearly temperature increases, but temperature shake amplitude decreases; water-proof layer was effective against thermal retardation. 6 tabs, 6 figs, 11 refs.
出处
《交通运输工程学报》
EI
CSCD
北大核心
2008年第2期44-48,共5页
Journal of Traffic and Transportation Engineering
基金
国家西部交通建设科技项目(200731881267)
教育部新世纪优秀人才支持计划项目(NCET-07-0118)
关键词
隧道工程
寒冷地区
温度场
变化规律
正弦函数回归法
保温隔热
tunnel engineering
cold area
temperature filed
changing rules
sine function regression method
thermal retardation
