Application of Improved Single-Hole Superposition Theory in Nonequal Cross-Section Tunnel Intersection

<div> Stress variation of surrounding rock under different tunnel diameters differences. (a) Once the hole diameter; (b) twice the hole diameter; (c) 3 times the hole diameter; (d) 4 times the hole diameter.</div>

Advances in Civil Engineering

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Figure 8

Figure 8: Application of Improved Single-Hole Superposition Theory in Nonequal Cross-Section Tunnel Intersection 