沥青路面下冻土热稳定性和热融敏感性的变化

Change of Thermal Stability and Thermal Thawing Sensitivity of Frozen Soil under Asphalt Pavement

多年冻土区修筑沥青路面后 ,引起了路基下多年冻土上限、多年冻土热状态等变化。本文根据提出的多年冻土热稳定性和热融敏感性模型 ,定量地评价多年冻土区修筑沥青路面后冻土热稳定性和热融敏感性的变化。结果显示 ,修筑路基并铺设沥青路面后 ,冻土热稳定性和热融敏感性发生了较大的变化 ,并与多年冻土顶板温度、年平均地温。

After asphalt pavement having been constructed in permafrost regions, permafrost thermal regime and permafrost table under roadbed will undergo a change. Change of permafrost thermal stability and thermal thawing sensitivity are quantitatively evaluated with theoretical model after asphalt pavement constructed. The results indicate that permafrost thermal stability and thermal thawing sensitivity have undergone great change after asphalt pavement constructed, and are better consistent with the change of permafrost table temperature, mean annual ground temperature and seasonally thawed depth.