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Behavior of the Air Phase within Embankment Due to Rainfall

机译：降雨导致路堤内空气相的行为

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In this study, air pressure behavior within an earth structure was investigated through a full-scale embankment test. The road embankment (2 m height) was constructed on low-permeability soil and measurement devices (tensiometers, air pressure meters, and soil moisture meters) were installed. The embankment was exposed to natural conditions, such as rainfall and evaporation, and vehicle weight was applied. Characteristic behaviors of water and air pressure were observed throughout the 1-year monitoring period. Water pressure increased under rainfall and kept decreasing due to evaporation without rainfall. The infiltrated rainwater flowed toward the slope toe. Consequently, water pressure at top of the slope increased due to rainfall and decreased soon after rainfall stopped; while pressure at the slope toe started decreasing after a period of time. Conversely, air pressure increased under only heavy rain. Moreover, it decreased to a point lower than atmospheric pressure following the heavy rain and recovered after a brief interval.
机译：在这项研究中，通过全面的路堤测试研究了土壤结构内的气压行为。在低渗透性土壤上建造路堤（高2 m），并安装测量设备（张力计，气压计和土壤湿度计）。路堤暴露于自然条件下，例如降雨和蒸发，并施加了车辆重量。在整个1年的监测期内，观察到水和气压的特征行为。在降雨条件下，水压增加，而在没有降雨的情况下，由于蒸发，水压持续下降。渗入的雨水流向坡脚趾。因此，斜坡顶部的水压由于降雨而增加，而在降雨停止后不久下降。一段时间后，坡脚趾处的压力开始下降。相反，只有下大雨，气压才会增加。而且，在大雨之后，它降低到低于大气压的点，并在短暂的间隔后恢复。

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