During rainfall, asphalt pavement structure layers are often not saturated. To study the dynamic response of unsaturated permeable asphalt pavement under moving load, 3-D finite element models for asphalt pavements with coupling of water–air–force were built based on unsaturated seepage theory. The vertical stress, the transverse stress, and the pore-water pressure, the vertical displacement responses of the asphalt pavement under moving loads were investigated. In addition, the results were compared and analyzed with that of the saturated permeable asphalt pavement. The results showed that the maximum transverse stress of the unsaturated asphalt pavement was about 200 kPa, while the saturated asphalt pavement was about 300 kPa. It is showed that the discharge of water has a great effect on avoiding cracks in the pavement. The maximum pore-water pressure of the unsaturated asphalt pavement is 56.67 kPa, and that of the saturated asphalt pavement decreases by 40.70 % in the same condition. The change of displacement in the area near the upper layer is more remarkable, and the maximum displacement of the saturated asphalt pavement is less than that of the unsaturated asphalt pavement. The vertical stress, transverse stress and pore-water pressure of the unsaturated asphalt pavement are smaller than saturated asphalt pavement. The asphalt pavement is prone to structural damage such as fatigue cracking and pit slot by dynamic water scouring when it is saturated condition. Therefore, the drainage inside the pavement is very important for the service life of the asphalt pavement. It ensures the asphalt pavement is unsaturated during rainfall. In future road construction, more permeable pavements should be considered. Keywords: Unsaturated seepage, Water–air–force coupling, Vertical stress, Transverse stress, Pore-water pressure


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Dynamic response characteristics of permeable asphalt pavement based on unsaturated seepage


    Beteiligte:
    Yazhen Sun (Autor:in) / Rui Guo (Autor:in) / Xiaochen Wang (Autor:in) / Xihong Ning (Autor:in)


    Erscheinungsdatum :

    2019




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Unbekannt




    Runnoff Pollutants Control by Asphalt Permeable Pavement

    Xie, X. / Xu, Y. / Wang, L. | British Library Conference Proceedings | 2009


    Performance of Permeable Asphalt Pavement during Rainfall Infiltration

    Huang, Xiao-Lan / Xiong, Jun | Tema Archiv | 2011



    Random Dynamic Response Analysis of Asphalt Pavement Based on the Vehicle-Pavement Interaction

    Li, Qian ;Liu, Jun Qing ;Liu, Hong | Trans Tech Publications | 2015


    Dynamic Response in ALF Aggregate Base Asphalt Pavement

    Zhuang, C.Y. / Shen, A.Q. / Wang, L. | British Library Conference Proceedings | 2011