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基于多孔介质非饱和渗流理论与降雨入渗理论,利用有限元方法对沥青路面结构在降雨条件下沥青路面结构渗流场的变化规律进行了研究。结果表明:降雨入渗过程将会导致沥青路面结构内部饱和度和孔隙水压力出现显著的变化,在降雨初期,饱和度随着降雨的历时延续而显著提高,随后饱和度会有所下降,然后逐渐趋向稳定,并且由上至下,各面层逐步达到完全饱和状态;孔隙水压力也随着时间的增加而逐步提高,由初始状态下的基质吸力变化为正的水压力。
Based on the unsaturated seepage theory of porous media and the theory of rainfall infiltration, the variation regularity of the seepage field of asphalt pavement structure under the condition of rainfall is studied by the finite element method. The results show that the rainfall infiltration process will lead to a significant change in the internal saturation and pore water pressure of asphalt pavement structure. In the early stage of rainfall, the saturation increases significantly with the lapse of rainfall duration, then the saturation will decrease, and then Gradually become stable, and from top to bottom, the surface gradually reached full saturation; pore water pressure also increased with time gradually increased from the initial state of the substrate suction changes to positive water pressure.