Abstract：In order to analyze the dynamic stress and settlement charcteristics of the foudation under train load, the dynamic coupling
numerical model of rail-embankment-foudation interaction under train load was established, considering the effect of train speed,
embankment height and base stiffness. The dynamic stress distribution of the foudation and settlement charcteristics of surface under
train load were researched, and the reinforcement effect of different foundation reinforcement forms was discussed. The results show
that the dynamic stress of foundation decreases quickly along the horizontal and vertical direction under train load. The vertical
dynamic stress of foundation and foundation settlement increase as the train speed increases, while decrease with the increase of the
embankment height and base stiffness. The embankment height should not be less than 2 m. The foudation settlement decreases with the
increase of the reinforcement depth and stiffness of the reinforced area. The higher train speed, the more obvious effect; and the
best foundation reinforcement depth is 3 m.
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2017, Vol. 36 
