Many new excavations are planned and constructed near or parallel to existing tunnels. Adjacent excavations may significantly impact the stress and deformation of existing tunnels. To evaluate deformation and the mechanisms of stress transfer, well-instrumented centrifuge model tests are back-analyzed using an advanced nonlinear constitutive model, known as a hypoplasticity model. Three-dimensional stress transfer mechanisms along the tunnel axis are demonstrated by changes in normal stresses in the soil around the tunnel. It is found that, for an existing tunnel located directly beneath the basement, the maximum reduction of earth pressure around the tunnel is about 50% at the crown and 20% at the springline of its initial earth pressure. As a result, the tunnel is vertically elongated and horizontally compressed. A tunnel, located at the side of a basement, is elongated along the connection between the right shoulder and left knee and compressed between the left shoulder and right knee. It is expected that this study will help improve the fundamental understanding of three-dimensional stress transfer during basement excavation around existing tunnels.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
D. Burford, "Heave of tunnels beneath the Shell Center, London, 1959-1986," Geotechnique, 38(1), 135-137 (1988).
K. Y. Lo and J. A. Ramsay, "The effect of construction on existing subway tunnels − a case study from Toronto," Tunn. Undergr. Sp. Tech., 6(3), 287-297 (1991).
M. Dolezalova, "Tunnel complex unloaded by a deep excavation," Comput. Geotech., 28(6), 469-493 (2001).
J. S. Sharma, A. M. Hefny, J. Zhao, and C. W. Chan, "Effect of large excavation on displacement of adjacent MRT tunnels," Tunn. Undergr. Sp. Tech., 16(2), 93-98 (2001).
G. Zheng and S. W. Wei, "Numerical analysis of influence of overlying pit excavation on existing tunnels," J. Cent. South Univ. Technol., 15(s2), 69-75 (2008).
H. L. Liu, P. Li, and J. Y. Liu, "Numerical investigation of underlying tunnel heave during a new tunnel construction," Tunn. Undergr. Sp. Tech., 26(2), 276-283 (2011).
X. Huang, H. F. Schweiger, and H. W. Huang, "Influence of Deep Excavations on Nearby Existing Tunnels," Int. J. Geomech., 13(2), 170-180 (2013).
J. W. Shi, C. W. W. Ng, and Y. H. Chen, "Three-dimensional numerical parametric study of the influence of basement excavation on existing tunnel," Comput. Geotech., 63, 146-158 (2015).
C. W. W. Ng, J. W. Shi, and Y. Hong, "Three-dimensional centrifuge modelling of basement excavation effects on an existing tunnel in dry sand," Can. Geotech. J., 50(8), 874-888 (2013).
C. W. W. Ng, J. W. Shi, D. Masin, H. S. Sun, and G. H. Lei, "Influence of sand density and retaining wall stiffness on three-dimensional responses of tunnel to basement excavation," Can. Geotech. J., 52(11), 1811-1829 (2015).
X. Huang, H. W. Huang, and D. M. Zhang, "Centrifuge modeling of deep excavation over existing tunnels," Geot. Eng., 167(1), 3-18 (2014).
C. W. W. Ng, H. S. Sun, G. H. Lei, J. W. Shi, and D. Masin, "Ability of three different soil constitutive models to predict a tunnel's response to basement excavation," Can. Geotech. J., 52(11), 1685-1698 (2015).
ABAQUS, Inc., ABAQUS User's and Theory Manuals, Version 6.6, Providence Rhode Island, USA (2006).
P. A. Von Wolffersdorff, "A hypoplastic relationship for granular material with a predefined limit state surface," Mech. Cohes-Frict. Mater., 1(3), 251-271 (1996).
A. Niemunis and I. Herle, "Hypoplastic model for cohensionless soils with elastic strain range," Mech. Cohes-Frict. Mater., 2(4), 279-299 (1997).
I. Herle and G. Gudehus, "Determination of parameters of a hypoplastic constitutive model from properties of grain assemblies," Mech. Cohes-Frict. Mater., 4(5), 461-486 (1999).
K. Maeda and K. Miura, "Confining stress dependency of mechanical properties of sands," Soils Found., 39(1), 53-67 (1999).
S. Yamashita, M. Jamiolkowski, and D. C. F. Lo Presti, "Stiffness nonlinearity of three sands," J. Geotech. Geoenviron. Eng., ASCE, 126(10), 929-938 (2000).
Author information
Authors and Affiliations
Additional information
Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 5, p. 7, September-October, 2018.
Rights and permissions
About this article
Cite this article
Sun, H.S., Wang, L.W., Chen, Y.D. et al. Nonlinear Analysis of Tunnel Deformation and Mechanisms of Stress Transfer Caused by Basement Excavation. Soil Mech Found Eng 55, 298–304 (2018). https://doi.org/10.1007/s11204-018-9540-2
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11204-018-9540-2