基于空间插值理论的隧道洞口气温计算方法  

Calculation Method of Tunnel Portal Temperature Based on Spatial Interpolation Theory

作　　者：罗彦斌[1,2] 陈建勋[1,2] 王梦恕[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]长安大学桥梁与隧道陕西省重点实验室,陕西西安710064

出　　处：《中国铁道科学》2010年第3期42-46,共5页China Railway Science

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)

摘　　要：基于空间插值理论中的Kriging法,提出利用气象观测数据确定隧道洞口气温的计算方法。选取隧道洞口附近气象观测站的气温观测数据,通过回归分析得到特征温度,并根据海平面高度进行修正得到气温测量值;利用最小二乘法,通过半变异函数拟合值得到各气温测量值的权重值;将气温测量值和其权重值代入Kriging法的估计公式计算,将计算值根据隧道洞口的海拔高度进行修正,得到隧道洞口的年平均气温和年气温振幅。以某寒区隧道为例,选取距离隧道洞口最近的5个气象观测站的观测数据,应用上述方法计算,得到隧道洞口的年平均气温为8.35℃、年气温振幅为17.67℃。与实测数据对比可知,两者相对误差小于10%,说明采用该计算方法可以方便、准确地计算隧道洞口处的气温。Based on the Kriging method in the spatial interpolation theory,the calculation method using the meteorological observation data to calculate the temperature of the tunnel portal was presented.The temperature observation data of the weather stations near the tunnel portal were chosen.The characteristic temperatures were obtained by regression analysis and were further amended according to the height of sea level to get the temperature measured values.Making use of the least square method,the weight value of each temperature measured value was obtained through the fitted value of the semi-variant function.The temperature measured value and its weight value were calculated in the estimation formula of the Kriging method.The calculated values were amended according to the altitude of the tunnel portal to obtain the annual average temperature and the annual temperature amplitude of the tunnel portal.Taking a tunnel in cold region for example,the observation data of five weather stations near the tunnel portal were chosen and calculated by the above method.The annual average temperature and the annual temperature amplitude were obtained as 8.35 and 17.67 ℃ respectively.The results show that the relative errors between the measured data and the calculated data are less than 10% by comparison,which indicates that the method can easily and accurately calculate the temperature of the tunnel portal.

关 键 词：寒区隧道 洞口气温 气象资料 空间插值理论 Kriging插值法 

分 类 号：U456.33[建筑科学—桥梁与隧道工程] TU445[交通运输工程—道路与铁道工程]