Mathematical Problems in Engineering / 2016 / Article / Fig 5

Research Article

Upper Bound Solution of Safety Factor for Shallow Tunnels Face Using a Nonlinear Failure Criterion and Shear Strength Reduction Technique

Figure 5

Effect of and on the FOS for blow-out failure mechanism ( = 800 kPa, = 20 kN/m3, = 90 kPa, = 247.3 kPa, = 1~3, = 1.0~2.0).
(a)
(b)

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