Abstract
Pre-ground improvement is an auxiliary method for mountain tunnels with shallow overburdens in loose sandy grounds. Although pre-ground improvement provides stabilization to the tunnel face and suppresses the settlement of the ground surface, the seismic behavior of the tunnels is not well understood. Previously, the authors performed dynamic centrifugal model experiments and confirmed the basic seismic behavior of shallow overburden tunnels with pre-ground improvement. However, the experiments did not reproduce the tunnel construction process; in other words, the stress release from the ground due to the tunnel excavation was not considered. In this study, therefore, reproduction analyses of the centrifugal model experiments were performed using a two-dimensional elasto-plastic finite element method, and the applicability of the numerical method was examined. Furthermore, analyses reproducing the stress release from the ground were also conducted using the same numerical method. From the results, it was confirmed that the experiments were simulated accordingly by using the proposed numerical method. Moreover, it was found that, in terms of the seismic behavior of shallow overburden tunnels with pre-ground improvement, the numerical results and the experimental results showed the same tendencies whether or not the stress release from the ground due to the tunnel excavation was considered.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Similar content being viewed by others
References
Cui, Y., Kishida, K., Kimura, M.: Numerical study on the effect of pre-ground improvement method on control of ground subsidence occurring in shallow overburden NATM tunnels. In: Proceedings of the 7th China-Japan Geotechnical Symposium, 16–18 March, Sanya, China, pp. 31–37 (2018)
Japan Road Association: Specifications for Highway Bridges Part 5 Seismic Design (2012)
Kishida, K., Cui, Y., Nonomura, M., Iura, T., Kimura, M.: Discussion on the mechanism of ground improvement method at the excavation of shallow overburden tunnel in difficult ground. Underground Space 1(2), 94–107 (2016)
Nakai, T., Hinokio, M.: A Simple elastoplastic model for normally and over consolidated soils with unified material parameters. Soils Found. 44(2), 53–70 (2004)
Sawamura, Y., Kishida, K., Kimura, M.: Centrifuge Model Test and FEM Analysis of Dynamic Interactive Behavior between Embankments and Installed Culverts in Multiarch Culvert Embankments. Int. J. Geomech. 15(3), 04014050 (2015)
Sawamura, Y., Konishi, K., Kishida, K., Kimura, M.: Centrifuge model tests on shallow overburden tunnels with pre-ground improvement to clarify seismic behavior. In: Proceedings of ITA-AITES WORLD TUNNEL CONGRESS, 3–9 May, Naples, Italy, pp. 1528–1537 (2019)
Ye, B., Ye, G.L., Zhang, F., Yashima, A.: Experiment and numerical simulation of repeated liquefaction-consolidation of sand. Soils Found. 47(3), 547–558 (2007)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2021 The Author(s), under exclusive license to Springer Nature Switzerland AG
About this paper
Cite this paper
Sawamura, Y., Konishi, K., Cui, Y., Kishida, K., Kimura, M. (2021). Numerical Simulations of Centrifugal Experiments on Seismic Behavior of Shallow Overburden Tunnels with Pre-ground Improvement. In: Barla, M., Di Donna, A., Sterpi, D. (eds) Challenges and Innovations in Geomechanics. IACMAG 2021. Lecture Notes in Civil Engineering, vol 126. Springer, Cham. https://doi.org/10.1007/978-3-030-64518-2_49
Download citation
DOI: https://doi.org/10.1007/978-3-030-64518-2_49
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-64517-5
Online ISBN: 978-3-030-64518-2
eBook Packages: EngineeringEngineering (R0)