Study on Vibration Isolation Effect of Concrete Row Piles in Substratum of Rail Transit
In order to study the vibration isolation effect of concrete row piles under the track traffic loads,the wheel-rail-foundation coupling model is established.Through the analysis of the track vertical irregularity power spectrum,an irregular track model is established and the train operation process on the irregular track is simulated.Based on the control variable method,the influence of the geometrical parameters variation of the concrete row piles on the vibration isolation effect is studied.The research results show that the concrete row piles have a certain vibration isolation effect,and the vibration isolation effect can change with the change of the geometrical parameters of the row piles.With the increase of pile length,the vibration isolation effect of subgrade slope and foundation depth is enhanced.With the increase of burying depth and pile spacing,the vibration isolation effect of concrete row piles decreases.The smaller the buried depth of the concrete row piles is,the better the vibration isolation effect is.The closer the concrete row pile is,the better the vibration isolation effect is.The effect of vibration strengthening appears in the interface of soil layer,so,attention should be paid to the effect of soil layer interface in practical construction.
vibration and waverail transitcoupling modelan irregular trackconcrete row pileseffect of vibration isolation
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