Calculation Model and Influencing Factors of Surrounding Rock Loosening Pressure for Tunnel in Fold Zone

<div>Simplified calculation models of surrounding rock loosening pressure for tunnel in the fold zone. (a) Anticline zone tunnel. (b) Oblique zone tunnel.</div>

Advances in Civil Engineering

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Figure 2

Figure 2: Calculation Model and Influencing Factors of Surrounding Rock Loosening Pressure for Tunnel in Fold Zone 