Public health impacts from subway noise: Case study Hong Kong

Xu, Stephany Y.; Jiang, Changyong; Huang, Li-Xi

doi:10.1121/1.5101747

Cited by 7 publications

(2 citation statements)

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“…Subway vibration is a kind of wave, which could transmit from tunnel structure and surrounding strata to building construction. Therefore, the vibration insulation system is generally divided into three parts [9,20]: changing wheel-rail contact characteristics [18,21,22], cutting off or reducing vibration transmission [23] and passive isolation measure for objects [24][25][26][27][28][29]. As mentioned above, it is observed that the most prominent and visible attenuation of vibration is from the track to the ballast bed ( Figure 5 and Figure 7), so the reducing vibration source excitation intensity is the most effective vibration isolation method.…”

Section: Vibration Isolation Designmentioning

confidence: 99%

Field Measurement and Research on Environmental Vibration due to Subway Systems: A Case Study in Eastern China

et al. 2019

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With the rapid development of subway systems, the negative environmental impacts of vibration induced by subways has gradually become a research hotspot. For the purpose of developing predictive models of vibration and designing effective vibration mitigation systems, continuous field dynamic measurements were conducted simultaneously in a subway tunnel, ground, and building in eastern China, the most prosperous region in China. The characteristics of vibration transmission and attenuation induced by subway were analyzed by statistical analysis of large amounts of measurement data. The results showed that most prominent and visible attenuation of vibration is from the track to the ballast bed in the tunnel, where the ground-borne vibration would quickly decrease exponentially with distance. The results also showed that the measured attenuation value of indoor vibration was approximate 0.76 dB on average between each floor. Moreover, the decay ratio of the vibration increased with the increase in the frequency range. Based on these findings, construction gauge of 20-25 m outside of the tunnel is recommended. In addition, reducing the vibration source excitation intensity is the most effective vibration isolation method, especially by track structural transformation. Sustainability 2019, 11, 6835 2 of 12The subway vibration effect on the surrounding environment is not only related to the tunnel structure, stratigraphic characteristics, and building structure, but also to the track and train [9]. Therefore, unlike vibration induced by other sources, such as airplanes, ground traffic or industrial machinery, vibration induced by subway has certain distinctive characteristics, such as low frequency, persistence, and longevity. Thus, more theoretic analysis and field measurements of the vibration induced by subway are also needed to determine causes, characteristics, and its effects.Among the various research methods, the numerical simulation is widely used to predict the environmental influence of vibration induced by subway [10]. Unfortunately, all the simplifying assumptions used in numerical models of ground vibration induced by subway could result in maximum errors of ±10 dB in predictions [11]. Although field measurement involves a lot of data collection and analysis, it is the most direct and reliable method in studying subway vibration propagation. Field measurement is also the only way of verifying the accuracy of other methods, especially when it comes to locally applicable ones [12][13][14].Although there have been many studies on subway vibration worldwide [8], further field measurement studies, specific to vehicle-track excitation source and vibration propagation, are still required. In this study, in order to ascertain the characteristics of vibration transmission and attenuation induced by subway, and to predict the environmental influence of subway train-induced vibration on ground and inside over-track buildings, the continuous dynamic measurement was conducted simultaneously in the subway tunnel, grou...

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Section: Vibration Isolation Designmentioning

confidence: 99%

Field Measurement and Research on Environmental Vibration due to Subway Systems: A Case Study in Eastern China

et al. 2019

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“…This study described the railway noise level in Hong Kong by analyzing the features of potential sources and presenting technical recommendations to public companies and the railway to evaluate. The overall noise data of the nine city-wide railway lines was presented and compared with other railway lines from around the world [2]. Many achievements concerning the interior noise problem of trains have been made theoretically and numerically.…”

Section: Introductionmentioning

confidence: 99%

Noise pollution contours in metro stations (case study of Tehran metro)

Forouhid¹,

Ilkah²,

Mahmoudi³

2021

J. meas. eng.

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To encourage the society to choose the public transportation system, it should comfort and satisfy people. Noise pollution in urban transportation systems is a risk that can endanger passenger health and affect their use of public transportation. Hence, this study investigates the effect of noise pollution on users' satisfaction of Tehran Metro line 7 using a sound level meter to measure noise pollution in four stations, namely Sanat Square, Tarbiat Modarres University, Shahid Navvab Safavi, and Rudaki. The data was analyzed using noise measurement, and noise pollution is compared at four stations with noise contour maps.

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