Modelling of train-induced vibration in subway interactions

ABSTRACT

The investigation of the dynamic response of the tunnels and structures under the acting of train vibrating load is significant for subway tunnels. In this paper, the intersection of Line 4 of Tehran subway with Tohid Tunnel is investigated using numerical modelling. Because these tunnels are excavated in the soil, the model is considered as a continuum condition, and a 3D model generated based on the finite difference method. In this research, the dynamic load of the train is applied at Line 4, and particle velocity on the ground recorded in three vertical sections, in the perpendicular direction to Line 4. The results show that the measured peak ground velocity is 1.75 mm/s more than the allowable value. So, to reduce the vibration level, it is better to use light waggons. If the weight of waggons with the passenger be less than 29.4 tonnes, the level of particle velocity will be less than 2.5 mm/s.

KEYWORDS:

• Train-induced vibration
• 3D numerical modelling
• dynamic loading
• Finite Difference Method (FDM)

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

F. Nezhadshahmohammad

Farshad Nezhadshahmohammad holds a Ph.D. from Sahand University of Technology. He was a visiting student at the University of Alberta, Canada. He is an academic member of the Faculty of Mining Engineering at Urmia University, Iran. He has experience in mine planning and optimization, stability analyzing of tunnels, simulation, and programming.

M. Saeedi

Mehsi Saeedi holds M.Sc degree in Mining Engineering from University of Tehran, Iran. He has 7 years of research, teaching, and consulting experience. He is interesting in dynamic analyzing, underground space simulation.

Y. Pourrahimian

Yashar Pourrahimian is currently an Associate Professor of Mining Engineering at University of Alberta. He holds a Ph.D. from University of Alberta (UofA). He holds a BSc in Mining Engineering from Sahand University of Technology, Iran. He received his M.Sc. degree in Mining Engineering from University of Tehran, Iran. He worked as an academic member in the Faculty of Mining Engineering at Sahand university of Technology. He joined the Department of Civil and Environmental Engineering and School of Mining and Petroleum Engineering at the University of Alberta, Canada in 2013.