Abstract
Tunnels are important underground structures which require due attention at all stages of their construction process. This task involves huge expenditure and time. Hence, other factors which may affect the functioning of the tunnel in the long run must also be incorporated in the studies. With the growing demand of space for developing various facilities, the best possible way to economize the underground space is being looked after. The purpose of this paper is to study the tunnel behaviour addressing both issues of space and impact loading, i.e. twin circular tunnels running parallel to each other are analyzed under impact loading. Synthetic rock material is prepared in the laboratory and its engineering properties are determined. These properties are used to develop FEM model of the twin tunnel using ABAQUS to study stress and displacements induced in the rock model due to incidence of impact load. The point of load application has a major effect on the deformations in the tunnels. This effect is studied by considering two cases of point of load application on the top surface: (i) at the midpoint between the tunnels, and (ii) at the centre of one of the tunnels. Extent of damage suffered by the tunnels due to combined effect of rock strength, magnitude and application of impact load and overburden depth is quantified.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Similar content being viewed by others
References
Abaqus/Explicit User’s Manual, version 6.13. Dassault Systemes Simulia Corporation, Providence (2011)
Hoek, E., Brown, E.T.: Underground Excavations in Rock. CRC Press (1980)
Mishra, S., Rao, K.S., Gupta, N.K., Kumar, A.: Damage to shallow tunnels in different geomaterials under static and dynamic loading. Thin-Walled Struct. 126, 138–149 (2018)
Mishra, S.: Physical and Numerical Modeling of Circular Tunnels Under Impact and Blast Loads. Doctoral Dissertation, IIT Delhi (2019)
Huang, F., Zhu, H., Xu, Q., Cai, Y., Zhuang, X.: The effect of weak interlayer on the failure pattern of rock mass around tunnel–scaled model tests and numerical analysis. Tunn. Undergr. Space Technol. 35, 207–218 (2013)
Yang, S.Q., Yin, P.F., Zhang, Y.C., Chen, M., Zhou, X.P., Jing, H.W., Zhang, Q.Y.: Failure behavior and crack evolution mechanism of a non-persistent jointed rock mass containing a circular hole. Int. J. Rock Mech. Min. Sci. 114, 101–121 (2019)
Zhou, L., et al.: The influence of impacting orientations on the failure modes of cracked tunnel. Int. J. Imp. Eng. 125, 134–142 (2019)
Chu, B.L., Hsu, S.C., Chang, Y.L., Lin, Y.S.: Mechanical behavior of a twin-tunnel in multi-layered formations. Tunn. Undergr. Space Technol. 22(3), 351–362 (2007)
Li, H., Chen, W., Hao, H.: Influence of drop weight geometry and interlayer on impact behavior of RC beams (2018)
Chen, S.L., Lee, S.C., Gui, M.W.: Effects of rock pillar width on the excavation behavior of parallel tunnels. Tunn. Undergr. Space Technol. 24(2), 148–154 (2009)
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(2), 210–214 (2008)
Indian Standard Code IS 9143: 1979 Method for the Determination of Unconfined Compressive Strength of Rock Materials. Bureau of Indian Standards, New Delhi, India
Indian Standard Code IS 9221: Method for the Determination of Modulus of Elasticity and Poisson's Ratio of Rock Materials in Uniaxial Compression. Bureau of Indian Standards, New Delhi, India
Indian Standard Code IS 13047: 1991 Method for Determination of Strength of Rock Materials in Triaxial Compression. Bureau of Indian Standards, New Delhi, India
Indian Standard Code IS 13030: 1991 Method of Test for Laboratory Determination of Water Content, Porosity, Density and Related Properties of Rock Material. Bureau of Indian Standards, New Delhi, India
Wang, X., Shi, J.: Validation of Johnson-Cook plasticity and damage model using impact experiment. Int. J. Impact Eng. 60, 67–75 (2013)
Zhang, R., Xiao, Y., Zhao, M., Zhao, H.: Stability of dual circular tunnels in a rock mass subjected to surcharge loading. Comput. Geotech. 108, 257–268 (2019)
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 Singapore Pte Ltd.
About this paper
Cite this paper
Sinha, S., Mishra, S., Rao, K.S., Chakraborty, T. (2021). Analysis of Twin Circular Tunnels Subjected to Impact Loads. In: Patel, S., Solanki, C.H., Reddy, K.R., Shukla, S.K. (eds) Proceedings of the Indian Geotechnical Conference 2019. Lecture Notes in Civil Engineering, vol 137. Springer, Singapore. https://doi.org/10.1007/978-981-33-6466-0_63
Download citation
DOI: https://doi.org/10.1007/978-981-33-6466-0_63
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-33-6465-3
Online ISBN: 978-981-33-6466-0
eBook Packages: EngineeringEngineering (R0)