Temperature distribution characteristic of subgrade in seasonally frozen regions

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.