Three-Dimensional Analytical Model for Coupled Track-Tunnel-Soil System in a Multilayered Half-Space
Publication: Journal of Engineering Mechanics
Volume 146, Issue 2
Abstract
An analytical model is presented in this paper to predict the three-dimensional dynamic response of a circular tunnel in an elastic multilayered half-space. By applying the transfer matrix method and wave transformation, the circular tunnel was coupled with the soil via the continuity condition of the tunnel–soil interface. The coupled tunnel-soil model could simulate the asymmetric dynamic responses induced by the load at an arbitrary angle. The track system was subsequently coupled to the tunnel-soil model by means of three-line support. After being validated via comparison with existing models in two special cases, the present model was applied to calculate the soil vibrations from a large-diameter double-line tunnel in a three-layered half-space. The results showed that the insertion gains for vertical and horizontal displacements between the single- and double-line loading cases are and , respectively, depending on the position of the observation point and frequency. The vibration levels generated by the double-line load were smaller than those generated by the single-line load at specific load frequencies.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request.
Acknowledgments
This project is supported by Projects of International Cooperation and Exchanges NSFC under Grant No. 51761135109, and the National Key R&D Program of China under Grant No. 2017YFB1201204.
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Published In
Journal of Engineering Mechanics
Volume 146 • Issue 2 • February 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Mar 19, 2018
Accepted: Jun 19, 2019
Published online: Nov 30, 2019
Published in print: Feb 1, 2020
Discussion open until: Apr 30, 2020
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