7Davis E H, Gunn M J, Mairetc R J. The stability of shallow tunnel and underground openings in cohesive material[J]. Geotechnique, 1980, 30(4):397-416.
8Duncan J M. State of the art : limit equilibrium and finite-element analysis of slopes[J].Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 1996, 122(7): 577-596.
9Zienkiewicz O C, Humpheson C, Lewise R W. Associated and non-associated Visco-plasticity in soil mechanics [J].Geotechnical Engineering, ASCE, 1975, 25(4): 671-689.
10Loganathan N, Poulos H G. Analytical prediction for tunnelling-induced ground movements in clay [J]. Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 124(9):846-856.
