A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Vibration isolation effect study of in-filled trench barriers to train-induced environmental vibrations
An in-filled trench barrier is usually used to reduce the damages from train-induced environmental vibrations. To find the vibration isolation effect of an in-filled trench barrier, this paper analyses the reflection coefficients and transmission coefficients of the Rayleigh wave at the interface between in-filled trenches and the soil. In our calculation formulas of ground vibrations, a single point and a single frequency excitation, as well as multi-point and multi-frequency excitation, are simultaneously derived in a soil-in-filled-trench system. Using these formulas and a numerical analysis, the effects of an in-filled trench barrier on the environmental vibrations induced by running trains are analyzed. The results show that the reflection coefficients increase, while the transmission coefficients decrease, with the density and elastic modulus of the in-filled material. The vibration isolation effect is clearly better than that without trenches. In a certain width range, the transmission coefficient and vertical acceleration levels decrease with the increase of trench width. The influences of the transmission coefficient and the vibration isolation effects are not clear with the trenches’ depth variation. The vertical vibrations of the ground pick-up point are all smaller than those without in-filled trenches.
Vibration isolation effect study of in-filled trench barriers to train-induced environmental vibrations
An in-filled trench barrier is usually used to reduce the damages from train-induced environmental vibrations. To find the vibration isolation effect of an in-filled trench barrier, this paper analyses the reflection coefficients and transmission coefficients of the Rayleigh wave at the interface between in-filled trenches and the soil. In our calculation formulas of ground vibrations, a single point and a single frequency excitation, as well as multi-point and multi-frequency excitation, are simultaneously derived in a soil-in-filled-trench system. Using these formulas and a numerical analysis, the effects of an in-filled trench barrier on the environmental vibrations induced by running trains are analyzed. The results show that the reflection coefficients increase, while the transmission coefficients decrease, with the density and elastic modulus of the in-filled material. The vibration isolation effect is clearly better than that without trenches. In a certain width range, the transmission coefficient and vertical acceleration levels decrease with the increase of trench width. The influences of the transmission coefficient and the vibration isolation effects are not clear with the trenches’ depth variation. The vertical vibrations of the ground pick-up point are all smaller than those without in-filled trenches.
Vibration isolation effect study of in-filled trench barriers to train-induced environmental vibrations
Yao, Jinbao (author) / Zhao, R. (author) / Zhang, Nan (author) / Yang, Dujuan (author)
2019-10-01
Yao , J , Zhao , R , Zhang , N & Yang , D 2019 , ' Vibration isolation effect study of in-filled trench barriers to train-induced environmental vibrations ' , Soil Dynamics and Earthquake Engineering , vol. 125 , 105741 . https://doi.org/10.1016/j.soildyn.2019.105741
Article (Journal)
Electronic Resource
English
DDC:
624
Study on Metro Environmental Vibration Influence and Vibration Isolation Effect of Isolation Trench
| Springer Verlag | 2017
Active Isolation of Machine Foundations by In-Filled Trench Barriers
| British Library Online Contents | 1996
Active Isolation of Machine Foundations by In-Filled Trench Barriers
| Online Contents | 1996