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Development of Empirical Relations to Predict Ground Vibrations due to Underground Metro Trains

  • Railroad Engineering
  • Published:
KSCE Journal of Civil Engineering Aims and scope

Abstract

The vibration caused due to underground metro trains in densely populated urban areas and its adverse effect on the nearby structures and occupants is a growing concern for the policymakers and government bodies, demanding its rapid and correct assessment. Metro bodies in India use Research Designs and Standards Organisation guidelines similar to Federal Transit Administration guidelines for vibration assessment. However, in the guidelines, there is limited discussion on soil geotechnical properties, tunnel depth and axle load, which considerably affect the magnitude of train-induced ground vibration. This study focuses on developing easily comprehendible empirical relations to predict metro train-induced ground vibrations considering the effect of these parameters. Multiple non-linear regression is used to establish the empirical relations utilising the datasets generated from a two-dimensional train-track-tunnel-soil dynamic interaction (TTTSDI) finite element model. The TTTSDI model is based on the two-step methodology available in the literature and is validated with field measurement results of the Delhi metro sites. The developed empirical relations predicted the ground vibrations with maximum and minimum errors of 2.66% and 0.84%, respectively.

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Abbreviations

\({{\dot a}_v},{{\dot a}_v}\) and a v :

Acceleration, velocity, and displacement vectors of the vehicle system, respectively

ä t, \({{\dot a}_t}\) and a t :

Acceleration, velocity and displacement vectors of the track system, respectively

M t, C t, and K t :

Global mass, damping and stiffness matrix of the track system, respectively

M v, C v, and K v :

Mass, damping and stiffness matrix of the vehicle system, respectively

N :

Number of degrees of freedom of track-tunnel subsystem

P t :

Slab track force vector

P v :

Vehicle force vector

vl :

Vibration level

V rms :

Root mean square velocity

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Acknowledgments

The first author received a doctoral fellowship from the Ministry of Education, Government of India, to carry out the research work and is grateful for the same. The author(s) are thankful to the Delhi Metro Rail Corporation Ltd., New Delhi (India), for sharing the necessary information for this research.

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Correspondence to Anil Kumar.

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Kedia, N.K., Kumar, A. & Singh, Y. Development of Empirical Relations to Predict Ground Vibrations due to Underground Metro Trains. KSCE J Civ Eng 27, 251–260 (2023). https://doi.org/10.1007/s12205-022-0529-z

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  • DOI: https://doi.org/10.1007/s12205-022-0529-z

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