A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Ground vibrations induced by the passage of double-line trains in underground tunnels
Abstract Subway systems consist of double lines to transport passengers in the outbound and inbound directions. The existing prediction models for subway-induced vibrations ignored the superimposed effect caused by the successive passage of double-line trains. This study develops a computationally efficient method to simulate ground vibrations during the simultaneous passage of double-line trains in underground tunnels. An analytical model is applied to calculate the transfer function of a track-tunnel-ground system in a multi-layered half-space. Two alternative designs of tunnels in a double-line subway system are considered, which are a double-track tunnel and twin single-track tunnels. By introducing the relation between two different moving frames of reference, a fully coupled solution for the train-track-tunnel-ground system that considers the dynamic interaction between the double-line trains is proposed. The numerical results indicate that the simultaneous passage of double-line trains induces a significant superimposed effect of ground vibrations. The superimposed effect can increase the vertical velocity in the one-third octave spectrum by up to 5 dB, and the running RMS value by up to 40% under the same track roughness. The ground vibrations from one double-track tunnel are more than 30% higher than those from two single-track tunnels due to the passage of the single-line train and double-line trains.
Highlights An efficient method is proposed to calculate vibrations during the simultaneous passage of double-line trains in tunnels. A solution for a train-track-tunnel-ground system that considers interaction between double-line trains is proposed. The superimposed effect of ground vibrations induced by the simultaneous passage of double-line trains is investigated. Ground vibrations from one double-track tunnel and two single-track tunnels under different train loads are compared.
Ground vibrations induced by the passage of double-line trains in underground tunnels
Abstract Subway systems consist of double lines to transport passengers in the outbound and inbound directions. The existing prediction models for subway-induced vibrations ignored the superimposed effect caused by the successive passage of double-line trains. This study develops a computationally efficient method to simulate ground vibrations during the simultaneous passage of double-line trains in underground tunnels. An analytical model is applied to calculate the transfer function of a track-tunnel-ground system in a multi-layered half-space. Two alternative designs of tunnels in a double-line subway system are considered, which are a double-track tunnel and twin single-track tunnels. By introducing the relation between two different moving frames of reference, a fully coupled solution for the train-track-tunnel-ground system that considers the dynamic interaction between the double-line trains is proposed. The numerical results indicate that the simultaneous passage of double-line trains induces a significant superimposed effect of ground vibrations. The superimposed effect can increase the vertical velocity in the one-third octave spectrum by up to 5 dB, and the running RMS value by up to 40% under the same track roughness. The ground vibrations from one double-track tunnel are more than 30% higher than those from two single-track tunnels due to the passage of the single-line train and double-line trains.
Highlights An efficient method is proposed to calculate vibrations during the simultaneous passage of double-line trains in tunnels. A solution for a train-track-tunnel-ground system that considers interaction between double-line trains is proposed. The superimposed effect of ground vibrations induced by the simultaneous passage of double-line trains is investigated. Ground vibrations from one double-track tunnel and two single-track tunnels under different train loads are compared.
Ground vibrations induced by the passage of double-line trains in underground tunnels
He, Chao (author) / Zhou, Shunhua (author)
2022-12-12
Article (Journal)
Electronic Resource
English
A Review of Researches on Ground-Borne Vibrations Due to Moving Trains via Underground Tunnels
| Online Contents | 2006
A Review of Researches on Ground-Borne Vibrations Due to Moving Trains via Underground Tunnels
| SAGE Publications | 2006
Ground vibration due to trains in underground railway tunnels
| British Library Conference Proceedings | 1999
A review on modelling ground vibrations generated by underground trains
| Taylor & Francis Verlag | 2019
Propagation of ground vibrations induced by moving trains
| British Library Conference Proceedings | 2005