季节性冰冻地区路基温度场分布规律  

Temperature distribution characteristic of subgrade in seasonally frozen regions

作　　者：谭忆秋[1] 徐慧宁[1] 周纯秀[2] 张魁 陈凤晨 

机构地区：[1]哈尔滨工业大学交通科学与工程学院,哈尔滨150090 [2]大连海事大学交通与物流工程学院,辽宁大连116026 [3]广东华路交通科技有限公司,广州510800 [4]中国民航机场建设集团公司,北京100601

出　　处：《哈尔滨工业大学学报》2011年第8期98-102,共5页Journal of Harbin Institute of Technology

基　　金：国家十一五科技支撑计划重点项目(2006BAJ18B05-04)

摘　　要：为准确掌握路基结构温度场的分布特点和变化规律,以季节性冰冻地区典型道路结构路基温度场一年多的跟踪观测数据为基础,开展了季节性冰冻地区路基温度场分布规律的研究,并利用统计回归方法建立了观测点所在区域路基温度场的预估模型.研究显示:路基温度场分布特性以年为周期呈余弦规律变化,不同深度路基的温度变化存在滞后性;热量在路基结构内的传递过程中伴随能量的衰减,且热量沿深度方向呈非线性传递.夏季温度梯度较小,冬季较大.在此基础上,基于观测数据,运用统计分析法,建立了观测点区域路基温度场预估模型,实测值与预测值的对比表明,该预估模型具有较好的精确性与实用性.Based on the field data collected from a medium-scale experimental pavement system,temperature distribution characteristic of subgrade in seasonally frozen regions was studied in detail,and the prediction model for subgrade temperature distribution was proposed with regression analysis.Test data illustrated that：The temperature of subgrade changed with time,and it followed cosine distribution;Energy was stored with the heat transfer in subgrade,and it transferred nonlinear with depth.Based on the collected data,the prediction model for subgrade temperature distribution in this area was proposed.The comparison between measured and predicted temperatures indicated that this model had good applicability and accuracy for this area.

关 键 词：季节性冰冻地区 路基 温度场 分布规律 预估模型 

分 类 号：U416.1[交通运输工程—道路与铁道工程]