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

<div>The schematic of improved 3D wedge limit equilibrium model: (a) force analysis of the prism above the wedge and (b) force analysis of instability model.</div>

Advances in Civil Engineering

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Figure 3

Figure 3: Wedge Instability Model Improvement of Shield Tunnel Excavation Face under Inclined Surface 