Abstract
The increasing number of twin-tunnels constructed in river-crossing subway traffic compels the designers to explore its dynamics performance in the excavation progress. The characteristics of particle accelerations of the granular medium in the surroundings are the important factors to reflect the excavation disturbance. In the construction process of the twin-tunnels, the excavation of the second tunnel (named tunnel_2) will be conducted when the first tunnel (named tunnel_1) is stable. In this paper, a three-dimensional scale model of the cross-river twin-tunnels is established utilizing the discrete element method (DEM) with PFC3D, the model aims to investigate the influence of the twin-tunnels construction on the surroundings. The numerical results show that the accelerations of the particles in the surroundings around tunnel_2 are larger than those around tunnel_1 both in horizontal and vertical directions. Kinetic energy transfers as a transverse wave and is dissipated by the friction resistance and the damping effect as the transmission distance increasing in the surroundings.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Mohammad, H.B., Masoud, R.M., Kim, D.S., Yun, W.C.: Effect of underground tunnel on the ground surface acceleration. Tunn. Undergr. Space Technol. 44(1), 10–22 (2014)
Chehade, F.H., Shahrour, I.: Numerical analysis of the interaction between twin-tunnels: influence of the relative position and construction procedure. Tunn. Undergr. Space Technol. 23(1), 210–214 (2008)
Li, X., Yuan, D.: Response of a double-decked metro tunnel to shield driving of twin closely under-crossing tunnels. Tunn. Undergr. Space Technol. 28(1), 18–30 (2012)
Ng, C.W.W., Boonyarak, T., MaÅ¡Ãn, D.: Three-dimensional centrifuge and numerical modeling of the interaction between perpendicularly crossing tunnels. Can. Geotech. J. 50(9), 935–946 (2013)
Xiong, C.: Technical characteristics and innovation of the cross-Yangtze river tunnel of Wuhan subway line No. 2. Railw. Surv. Des. 3, 1–7 (2014). (in Chinese)
Lu, J., Zhang, C., Jian, P.: Meso-structure parameters of discrete element method of sand pebble surrounding rock particles in different dense degrees. In: Proceedings of the 7th International Conference on Discrete Element Methods, vol. 188, pp. 871–879. Springer, Singapore (2016)
Zhang, Z., Zhang, X., Tang, Y., Cui, Y.: Discrete element analysis of a cross-river tunnel under random vibration levels induced by trains operating during the flood season. J. Zhejiang Univ. Sci. A. https://doi.org/10.1631/jzus.a1700002
Min, F., Zhu, W., Lin, C., Guo, X.: Opening the excavation chamber of the large-diameter size slurry shield: a case study in Nanjing Yangtze River Tunnel in China. Tunn. Undergr. Space Technol. 46, 18–27 (2015)
Rocha, M.: The possibility of solving soil mechanics problems by use of models. In: Proceedings of the 4th International Conference on Soil Mechanics and Foundation Engineering, London, England, vol. 1, pp. 83–88 (1957)
Fang, Y., Xu, C., Cui, G., Kenneally, B.: Scale model test of highway tunnel construction underlying mined-out thin coal seam. Tunn. Undergr. Space Technol. 56, 105–116 (2016)
Itasca Consulting Group Inc.: PFC2D, Version 4.0. Itasca, Minneapolis (2008)
Acknowledgement
The project was financially supported by the National Natural Science Foundation of China (No. 51408450) and the Fundamental Research Funds for the Central Universities (WUT: 2017-YB-014; 2017IVB079).
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Zhang, Z., Zhang, X., Wu, L., Zhang, H. (2018). Discrete Element Analysis of the Excavation Disturbance of Cross-River Twin-Tunnels on the Surroundings. In: Zhang, D., Huang, X. (eds) Proceedings of GeoShanghai 2018 International Conference: Tunnelling and Underground Construction. GSIC 2018. Springer, Singapore. https://doi.org/10.1007/978-981-13-0017-2_15
Download citation
DOI: https://doi.org/10.1007/978-981-13-0017-2_15
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-13-0016-5
Online ISBN: 978-981-13-0017-2
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)