Control of Metro Train-Induced Vibrations in a Laboratory Using Periodic Piles

Abstract

Laboratories with sensitive instruments need a low-vibration environment. It is a challenge to control the train-induced vibration impact on these instruments when a newly planned metro line is adjacent to a laboratory building. An alternative method of mitigating train-induced ground vibrations involves installing measures along the transmission path. Recent research has highlighted the potential of periodic pile barriers with specifically designed band gaps for controlling environmental vibrations. This study performed in-situ measurements of ambient vibrations inside and outside a laboratory containing various types of sensitive instruments and located adjacent to a newly designed metro line. The vibration transfer function of the laboratory was then obtained. To help design and optimize the band gaps of periodic piles, a novel band gap performance evaluation function was proposed. Finally, numerical analysis was conducted to validate the mitigation effect of the designed periodic piles. The results showed that the band gap performance evaluation function can be used to optimize the mitigation effect of periodic piles. The proposed periodic piles clearly attenuated vibrations between 52.4 and 74.3 Hz, especially those at 63 Hz. A comparison of general vibration criteria (VC) curves revealed that vibration attenuation of one level can be obtained by the designed periodic piles.

Field Test and Numerical Study of Train-Induced Vibration of Over-Track Buildings Above Metro Depot

“…Li et al [21] proposed OTPA and SVD formulas to predict the vibration of building. Ma et al [22] studied the vibration influence of this function on optimizing periodic piles using band gap performance evaluation function. The above research proposes a variety of solutions for the vibration problem caused by train, but the target over-track buildings of the research are relatively simple.…”

Allowable Limit of Human Annoyance Towards Ground-Borne Vibration Velocity Induced by Rail Traffic: A Review

“…Due to the potentially disastrous effects on the comfort of the local population, the long-term preservation of historic structures, and the operation of precision devices, the topics relating to traininduced vibrations are getting increased attention [8]. Additionally, as part of environmental quality control, the problems associated with train-induced vibrations must be addressed with the rise in overall living standards.…”

Method for Controlling Full-Frequency Band Environment Vibration by Coordinating Metro Vibration Sources and Propagation Paths

“…New metro lines are sometimes inevitably built close to highly vibration-sensitive areas owing to the rapid development of urban railway transits [1][2][3][4][5]. Therefore, traininduced vibrations have received increasing attention because of their negative impact on the long-term protection of historical buildings [6,7], the operation of precision instruments [8][9][10] and the residents living in the buildings over the metro depots [11][12][13][14], which are still urgent issues that need to be addressed today. In addition, how to predict train-induced environmental vibration more efficiently and accurately has also been a focus of attention in recent years [15,16], for example, considering various types of irregularities [17], establishing analytical prediction models [18] and introducing neural networks [19].…”

“…Wang et al [44] conducted a detailed study on the blocking effect of periodic in-filled pipes on low-frequency (1-10 Hz) vibration. Ma et al [10,45] investigated the vibration reduction effect of periodic pile barriers with specially designed bandgaps. They found that vibration waves of specific frequencies could be prevented from propagating in the formation by designing the bandgaps of the periodic piles.…”