由于线路纵向坡度限制,青藏铁路在某些越岭地段,不可避免会出现路堤高度小于所在地区路基临界高度的低路堤。针对唐古拉山南麓冻土区的特殊环境条件,对该类低路堤不同的工程补强措施进行了比较和试验研究。结果表明,大功率下的热棒+保温板的工程措施效果最好。 Due to the longitudinal gradient of the line, the Qinghai-Tibet Railway will inevitably have low embankments with embankment height less than the critical height of subgrade in its area in some cross-section of Qinghai-Tibet Railway. According to the special environmental conditions of the tundra in the south of Tanggula, different engineering reinforcement measures of this kind of low embankment are compared and tested. The results show that the hot rod under high power + insulation board works best.