Triggering and evolution of winter-time natural convection cooling effect in fractured-rock revetment embankments of the Qinghai-Tibet Railway are investigated by means of an air-flow function.

• 导出适用于变渗透率多孔介质的无量纲控制方程,并针对青藏铁路工程建设,分析了碎石护坡路堤冬季自然对流降温效应的产生和演化过程。