青藏公路沥青路面下活动层的热状态分析

Thermal State of Active Layer under Asphalt Pavement of Qinghai-Tibet Highway

在工程活动影响下 ,青藏公路沥青路面下活动层热状态与天然条件有着较大的差别 ,根据沥青路面和天然条件下活动层的热交换 ,活动层热交换都处于热积累过程 ,后者是由于气候变化的结果 ,同时 ,沥青路面下活动层的热交换远大于天然地面 ,在活动层中形成融化夹层。通过沥青路面下水热效应和水平热交换的分析 。

Under the effect of engineering action,thermal state of active layer under asphalt pavement is different from one under natural surface along Qinghai Tibet highway.According to thermal exchange amount of active layer under asphalt pavement and natural surface,thermal exchange is all in the process of thermal accumulation under asphalt pavement and natural surface,the latter is the result of climate warming.At the same time,thermal accumulation under asphalt pavement is far larger than that under natural surface,thaw sandwich is formed in the active layer under asphalt pavement.By analysis of heat effect of asphalt pavement,horizontal heat exchange and water under asphalt pavement,the main factors which influence on thermal state of active layer under asphalt pavement are given.