Wedge Instability Model Improvement of Shield Tunnel Excavation Face under Inclined Surface

<div>The relationship between active pressure and surface inclination angle under different internal friction angles: (a) <i>C</i>/<i>D</i> = 0.5, (b) <i>C</i>/<i>D</i> = 1, and (c) <i>C</i>/<i>D</i> = 2.</div>

Advances in Civil Engineering

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Figure 9

Figure 9: Wedge Instability Model Improvement of Shield Tunnel Excavation Face under Inclined Surface 