Tunnelling-induced vibration : a case study of shield machine interaction with diaphragm walls

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Wang, Shuying and Hu, Qinxin and Qu, Tongming and Liu, Aolin and Zhu, Hanbiao (2024) Tunnelling-induced vibration : a case study of shield machine interaction with diaphragm walls. Geotechnical and Geological Engineering. ISSN 0960-3182 (In Press) (https://doi.org/10.1007/s10706-024-03029-3)

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Abstract

This paper presents a case where shields were tunnelling in the diaphragm walls of a subway station. Attention focuses on the influence of vibration induced by shield tunnelling through subway station structures. The influence of ground conditions and tunnelling parameters on the self-vibration of the shield was analyzed to investigate how vibrations were generated by shield performance. The structure vibrations are presented to investigate the propagation law from shield to station structures and estimate the safety of structures. For self-vibration of the shield, the ground stiffness is highly correlated to the effective amplitude, and the difference in amplitude acceleration could reflect the orientation of ground layers. The ground homogeneity affected the amplitude, frequency, and mutations. The torque and rotational speed had a better correlation with vibration compared to thrust force and advance speed, suggesting that lowering the rotational speed is the most efficient way to reduce the effects of vibration. For structural vibration, the attenuation was significant when vibration propagated from the shield to the subway station structures. Although station structures were subjected to repeated load-unload cycles during tunnelling, the vibration was not destructive for station structures. Finally, some excellent opportunities for the application of vibration are discussed.

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