路面覆盖效应下路基温度场影响因素及分布规律的研究

Study on Factors Affecting Temperature Field of Subgrade under Pavement Coverage Effect and Its Distribution Law

为准确掌握路面覆盖效应下路基温度场的分布特性及变化规律,分析了强蒸发地区的路基温度场影响因素,以强蒸发地区路基温度场一年多的跟踪观测数据为基础,开展了强蒸发地区路面覆盖效应下路基温度场分布规律的研究。结果表明:路基不同深度温度变化存在相对滞后性;大气温度对路基温度场影响深度≤90 cm,且在该深度范围内呈非线性传递;路面覆盖效应导致温度在路面底部聚集。

To understand the distribution features and the change law of temperature field of subgrade under pavement coverage effect, this paper analyzed the factors affecting the temperature field of subgrade in the regions of strong evaporation and, on the basis of the observations there for more than one year, explored the distribution law of this temperature field. The result shows that there exists relative lag in temperature variation at different depth of subgrade; the effect of air temperature on the temperature field of subgrade is not more than 90 era, and transferred nonlinearly in the range of this depth; the pavement coverage effect will lead to aggregation of temperature at the bottom of the pavement.