基于正交试验的寒区隧道温度场影响因素敏感度研究  

Sensitivity Analysis of Influencing Parameters on Tunnel Temperature Field by Orthogonal Test Technique

作　　者：周小涵[1,2] 曾艳华[1] 范磊[3] 周晓军[1] 阮亮红 魏英杰[4] 

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,四川成都610031 [2]中铁大桥勘测设计院集团有限公司,湖北武汉430050 [3]中铁二院工程集团有限责任公司土建一院隧道所,四川成都610031 [4]成都建筑工程集团总公司,四川成都610014

出　　处：《湖南大学学报（自然科学版）》2016年第11期154-160,共7页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51278426)~~

摘　　要：影响寒区隧道温度场的因素众多,建立基于有限差分的隧道非稳态传热计算模型,以实际寒区铁路隧道南山隧道为例,采用正交试验法分别以隧道衬砌内部节点平均温度、隧道某断面衬砌温度和隧道洞口纵向冻结长度为指标对影响隧道温度场的各因素进行敏感度研究.结果表明:不同指标下各因素敏感度排列有局部差异;总体来讲,隧道埋深、洞内风向、隧道断面大小、洞内风速、入口风温、围岩导热系数、隧道埋深是影响隧道温度场的主要因素,围岩比热容、围岩密度是影响隧道温度场的次要因素.在寒区隧道抗防冻设计中,除去围岩比热容、围岩密度、围岩导热系数、入口风温等不可更改因素,对隧道温度场影响较大的隧道埋深、洞内风向、洞内风速、隧道断面大小、隧道埋深等隧道设计参数必须合理设置.Many factors affect the tunnel temperature field in cold region. An unsteady heat transfer calculation model was established based on finite difference method. Taking the Nan Shan railway tunnel in cold region as an example, the othogonal test method, which takes the average temperature of tunnel lining internal nodes, lining temperature of a certain section, and longitudinal frozen length of tunnel entrance as index, respectively, is applied to carry out sensitivity study of the influencing factors on tunnel temperature field. The results show that there are some local differences in the ranging of sensitivity of each factor under different indexs. Overall, the tunnel depth, wind direction in tunnel, tunnel section size, wind speed in tunnel, wind temperature of entrance, and thermal conductivity coefficient of surrounding rock are the main factors affecting the tunnel temperature field, while the surrounding rock density and specific heat of surrounding rock are the secondary factors affecting tunnel temperature field. In the anti- freezing design of the tunnel in cold region, except the unchanged factors such as the surrounding rock density, surrounding rock specific heat, surrounding rock heat transfer coefficient, thermal conductivity of surrounding rock, and wind temperature of tunnel entrance, sufficient attention should be paid on the design parameters that affect significantly the tunnel temperature field including the tunnel depth, wind di- rection in tunnel, wind speed in tunnel, and tunnel section size.

关 键 词：寒区铁路隧道 温度场 正交试验 敏感度分析 

分 类 号：TU91[建筑科学—建筑理论]