Abstract
The response of existing tunnel due to overlying excavation was studied using 2D FEM (Finite element method). Three typical locations of tunnel with respect to excavation, namely at the central line under the excavation bottom, directly under the base of diaphragm wall and outside of diaphragm, were considered. The variation of tunnel response with the change of location of tunnel was analyzed. The stress path of soil surrounding tunnel during the process of excavation was compared. Numerical analysis results indicate that the underlying tunnels at different locations under the excavation will experience convergence and divergence due to overlying excavation. Moreover, the tunnel located below base of diaphragm wall will experience distortion. The deformation is mainly due to the uneven changes of ground contact pressure on tunnel linings. Both the vertical and horizontal displacement of the tunnel decrease with the increase of the tunnel embedded depth beneath the formation of excavation.
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References
BURFORD D. Heave of tunnels beneath the Shell Center, London, 1959–1986[J]. Geotechnique, 1988, 38(1): 135–137.
LO K Y, RAMSAY J A. The effect of construction on existing subway tunnels—a case study from Toronto[J]. Tunnels and Deep Space, 1991, 6(3): 287–297.
DOLEZALOVA M. Tunnel complex unloaded by a deep excavation[J]. Computers and Geotechnics, 2001, 28(3): 469–493.
SHARMA J A, HEFNY A M, ZHAO J, CHAN C W. Effect of large excavation on deformation of adjacent MRT tunnels[J]. Tunnelling and Underground Space Technology, 2001, 16: 93–98.
HU Z F, YUE Z Q, ZHOU J, THAM L G. Design and construction of a deep excavation in soft soils adjacent to the Shanghai Metro tunnels[J]. Canadian Geotechnical Journal, 2003, 40(5): 933–948.
JIA Jian. Study of controlling measures on the deflection of metro tunnels due to overlying excavation[J]. Underground Construction and Ground Movement, ASCE, 2006, 26(s): 158–163.
MAO Chao-hui, LIU Guo-bin. Measures of preventing the in use tunnel disaster caused by overhead excavation[J]. Journal of Zhejiang University of Technology, 2005, 33(5): 534–537. (in Chinese).
YANG Ting, WANG Xin-lian, XU Qiong-he, WANG Yi. Analysis and design aiming at control of upwarping deformation of existed tunnel under new tunnel’s excavation[J]. Rock and Soil Mechanics, 2005, 26: 187–192. (in Chinese).
WISSER C, AUGARDE C E, BURD H J. Numerical modeling of compensation grouting above shallow tunnels[J]. Int J Numer Anal Meth Geomech, 2005, 29: 443–471.
KASPER T, MESCHKE G. A numerical study of the effect of soil and grout material properties and cover depth in shield tunneling[J]. Computers and Geotechnics, 2006, 33: 234–247.
KARKI R. Effects of deep excavations on circular tunnels in fine-grained soils[D]. Canada: University of Saskatchewan, 2006.
Hibbitt, Karlsson, Sorensen Inc. ABAQUS User’s Manual, version 6.5[M]. 2004.
FUNATSU T, HOSHINO T, SAWAE H, SHIMIZU N. Numerical analysis to better understand the mechanism of the effects of ground supports and reinforcements on the stability of tunnels using the distinct element method[J]. Tunnelling and Underground Space Technology, 2008, 23(5): 508–521.
LIAO S M, GAO L Q, ZHU H H. Soft ground movement under small disturbance of shield driving[J]. Geotechnical Special Publication, 2006, 150: 62–69.
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Foundation item: Project (07FDZDSF01200) supported by Tianjin Science and Technology Innovation Special Funds
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Zheng, G., Wei, Sw. Numerical analyses of influence of overlying pit excavation on existing tunnels. J. Cent. South Univ. Technol. 15 (Suppl 2), 69–75 (2008). https://doi.org/10.1007/s11771-008-0438-4
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DOI: https://doi.org/10.1007/s11771-008-0438-4