Research on active vibration isolation of concrete piles in foundation
In order to explore the influence of the parameter changes of piles on the near-field active vibration isolation after the concrete row piles were installed in the foundation,a three-dimensional finite element model consistent with the test site was established in the finite element software,and the finite element model was verified by calculation and analysis.The calculation results were verified and full-size finite element model was established with reference to the TB 10621-2014 Code for design of high-speed railway,and the specific influence of the parameter changes of row piles on the vibration isolation effect under the action of the train load was analyzed.The analysis results show that the effect of the pile length parameter on the vibration isolation effect is obvious.As the parameter increases,the vibration isolation effect is more ideal.When the pile length parameter is 10.5,the ratio will continue to increase,and the vibration isolation effect will not improve significantly.The larger the parameter is,the less ideal the vibration isolation effect is,and the smaller pile spacing can achieve the ideal vibration isolation effect.The burial depth parameter has a significant impact on the vibration isolation effect,the larger the parameter,the less ideal the vibration isolation effect.When the parameter is 3.5,the vibration isolation effect will be unsatisfactory,and a shallower burial depth can obtain a better vibration isolation effect.
row of concrete pilesactive vibration isolationfinite elementtrain load
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