强蒸发地区路基温度分布特性及其预估模型

发布时间：2018-04-10 01:26

本文选题：砾类土路基　切入点：温度分布特性　出处：《大连理工大学学报》2017年04期

【摘要】：为准确掌握强蒸发地区受路面覆盖效应影响的砾类土路基温度场的时空分布特性和规律,通过全天候温度监测,展开该路基温度场分布特性的研究.研究结果表明,不同深度处的月平均温度总体呈余弦或正弦函数分布,但相位角随路基深度和升降温过程的不同而变化;受路面覆盖效应影响较无路面覆盖效应影响的路基内低温峰值略低而高温峰值略高,但其分布规律基本一致;温度梯度在不同的温度条件以及在不同深度处分布也不尽相同,最大温度梯度在低温季节下的90~150cm深度范围内.在此基础上针对升温过程和降温过程,提出了温度场预估模型,该模型具有较高的相关性,并为强蒸发地区考虑路面覆盖效应影响的路基内部水汽迁移和湿度分布特性研究提供基础.
[Abstract]:In order to accurately understand the temporal and spatial distribution characteristics and laws of temperature field of gravel subgrade affected by pavement cover effect in strong evaporation area, the temperature field distribution characteristics of the roadbed were studied through all-weather temperature monitoring.The results show that the average monthly temperature at different depths is a cosine or sinusoidal function, but the phase angle varies with the depth of the roadbed and the process of rising and cooling.The low temperature peak value is slightly lower and the high temperature peak value is slightly higher than that without pavement coverage effect, but its distribution law is basically the same, and the temperature gradient is also different in different temperature conditions and at different depths.The maximum temperature gradient is within the 90~150cm depth range during the low temperature season.On this basis, a temperature field prediction model is proposed for the temperature rise process and the cooling process. The model has a high correlation.It also provides a basis for the study of water vapor migration and moisture distribution in subgrade considering the effect of pavement coverage in the area of strong evaporation.
【作者单位】：新疆大学建筑工程学院;山西省交通科学研究院黄土地区公路建设与养护技术交通行业重点实验室;
【基金】：国家自然科学基金资助项目(51368058) 黄土地区公路建设与养护技术交通行业重点实验室和山西省重点实验室开放课题资助项目(KLTLR-Y14-10)
【分类号】：U416.1

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