1. Abaqus Users Manual, Version 6.7., 2007. Hibbitt, Karlsson, and Sorensen Inc., Pawtucket, Providence, R.I.
2. Bowers, K.H., 1997. An Appraisal of the New Austrian Tunnelling Method in Soil and Weak Rock. PhD Thesis, The University of Leeds, 240pp.
3. Theories of Plasticity and the Failure of Soil Masses;Davis,1968
4. Displacement control in tunnels excavated by the NATM: 3-D numerical simulations;Farias;Tunnelling and Underground Space Technology,2004
5. Effect of different tunnel face advance excavation on the settlement by FEM;Karakus;Tunnelling and Underground Space Technology,2003