沥青路面下多年冻土上限变化计算的探讨  

The Calculation Depth of the Permafrost Table under Asphalt Pavement

作　　者：米海珍[1] 吴青柏[1] 马治学 

机构地区：[1]中国科学院兰州冰川冻土研究所

出　　处：《冰川冻土》1998年第2期116-119,共4页Journal of Glaciology and Geocryology

基　　金：国家自然科学青年基金

摘　　要：以相变热传导理论为基础，利用实测路面温度资料计算了多年冻土路基中冻土上限的变化趋势，认为上限的稳定是一个时间相当长的过程．人为上限在目前条件下仍在下降，从现在的１２ｃｍ／ａ下降至５０ａ后的５ｃｍ／ａ，届时上限深度将达到９４ｍ（从路面起计算）．The change of the permafrost table under asphalt parement is calculated based on heat transfer with phase change using the observation data. It is found that even if a highway has been built for more than ten years, the table is still changing. The thaw velocity changes from 12 cm/a at present to 5 cm/a after 50 years. Finally the permafrost table depth will be 9 4 meters. The permafrost table will take a long period to approximate its stability.

关 键 词：沥青路面 多年冻土 上限变化 冻土 路基 

分 类 号：U217[交通运输工程—道路与铁道工程] P642.14[天文地球—工程地质学]