Research Article
Limit Analysis of Collapse Mechanisms for Tunnel Roofs Subjected to Pore Water Pressure: A Numerical Approach
Figure 5
Effect of material parameter A of Hoek–Brown criterion on collapse mechanisms. The parameters are B = 5/6, σc = 3 × 104 kPa, σt = σc/100 = 300 kPa, − ht = 16.68 m, r = 3.75 m, C = 50 m, and γsat = 28.33 kN/m3.