6Chen W F. Limit analysis and soil mechanics[M]. New York: Elsevier Scientific Publishing Company, 1975.
7Soubra A H, Regenass P. Three-dimensional passive earth pressures by kinematical approach[J]. Journal of Geotechanical and Geoenvironmental Engineering, 2001, 126(11): 969-978.
8Donald I, Chen Z Y. Slope stability analysis by the upper bound approach: fundamentals and methods[J]. Canadian Geotechnical Journal, 1997, 34(6): 853-851.
9Wang Y J, Yin J H, Chen Z Y. Calculation of bearing capacity of a strip footing using an upper bound method[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 2001, 25(8): 841-851.
10Atkinson J H, Potts D M. Stability of shallow tunnel in cohesionless soil[J]. Geotechnique, 1977, 27(2): 203-215.
