2D numerical investigations of twin tunnel interaction

Abstract. The development of transportation in large cities requires the construction of twin tunnels located at shallow depth. As far as twin tunnels excavated in parallel are concerned, most of the cases reported in literature focused on considering the effect of the ground condition, tunnel size, depth, surface loads, the relative position between two tunnels, and construction process on the structural lining forces. However, the effect of the segment joints was not taken into account. Numerical investigation performed in this study using the FLAC 3D finite difference element program made it possible to include considerable influences of the segment joints and tunnel distance on the structural lining forces induced in twin tunnels. The structural lining forces induced in the first tunnel through various phases are considerably affected by the second tunnel construction process. Their values induced in a segmental lining are always lower than those obtained in a continuous lining. However, the influence of joint distribution in the second tunnel on the structural forces induced in the first tunnel is insignificant. The critical influence distance between two tunnels is about two tunnel diameters.

[1]  Günther Meschke,et al.  A 3D finite element simulation model for TBM tunnelling in soft ground , 2004 .

[2]  J. M. Rodríguez,et al.  Prediction and analysis of subsidence induced by shield tunnelling in the Madrid Metro extension , 2002 .

[3]  A. M. Hefny,et al.  An investigation into the behaviour of jointed tunnel lining , 2006 .

[4]  Charles Wang Wai Ng,et al.  Three-dimensional numerical investigations of new Austrian tunnelling method (NATM) twin tunnel interactions , 2004 .

[5]  Irini Djeran-Maigre,et al.  Three-dimensional numerical simulation for mechanized tunnelling in soft ground: the influence of the joint pattern , 2014 .

[6]  A M Hefny,et al.  Parametric studies on the interaction between existing and new bored tunnels , 2004 .

[7]  Saied M. F. Hossaini,et al.  Relationship between twin tunnels distance and surface subsidence in soft ground of Tabriz Metro - Iran , 2012 .

[8]  Irini Djeran-Maigre,et al.  2D numerical investigation of segmental tunnel lining behavior , 2013 .

[9]  Irini Djeran-Maigre,et al.  2D Tunnel Numerical Investigation: The Influence of the Simplified Excavation Method on Tunnel Behaviour , 2014, Geotechnical and Geological Engineering.

[10]  Irini Djeran-Maigre,et al.  3D Modelling for Mechanized Tunnelling in Soft Ground-Influence of the Constitutive Model , 2013 .

[11]  Mostafa Sharifzadeh,et al.  Interaction of twin tunnels and shallow foundation at Zand underpass, Shiraz metro, Iran , 2011 .

[12]  Antonio Aguado,et al.  Packer behavior under simple and coupled stresses , 2012 .

[13]  Murat Karakus.  Appraising the methods accounting for 3D tunnelling effects in 2D plane strain FE analysis , 2007 .

[14]  Christian Thienert,et al.  Segment design under consideration of the material used to fill the annular gap / Tübbingbemessung unter Berücksichtigung der Eigenschaften des Ringspaltmaterials , 2011 .

[15]  Daniel Dias,et al.  Impact of constitutive models on the numerical analysis of underground constructions , 2008 .

[16]  Supot Teachavorasinskun,et al.  Influence of segmental joints on tunnel lining , 2010 .

[17]  Daniel Dias,et al.  Probabilistic analyses of tunneling-induced ground movements , 2013 .

[18]  A. Guenot,et al.  Analysis of convergence behind the face of a tunnel : Tunnelling 82, proceedings of the 3rd international symposium, Brighton, 7–11 June 1982, P197–204. Publ London: IMM, 1982 , 1983 .

[19]  Pierpaolo Oreste.  Analysis of structural interaction in tunnels using the covergence–confinement approach , 2003 .

[20]  A Bezuijen,et al.  Grout pressures around a tunnel lining, influence of grout consolidation and loading on lining , 2004 .

[21]  S. C. Möller,et al.  On numerical simulation of tunnel installation , 2008 .

[22]  Isam Shahrour,et al.  Numerical analysis of the interaction between twin-tunnels: Influence of the relative position and construction procedure , 2008 .

[23]  R. K. Rowe,et al.  A method of estimating surface settlement above tunnels constructed in soft ground , 1983 .