Analysis reveals how soil anisotropy and tensile strength influence the ultimate support force in shield tunnels, indicating possible improvements in tunneling methods.
Key Points
The ultimate support force decreases with increasing nonhomogeneous coefficient and increases with the anisotropic coefficient.
Case studies validated the model, showing that relative error in support force calculations was only 1.92%, enhancing accuracy.
Soil layers with angles between 10° and 30° exhibited the lowest ultimate support force, identifying critical stability concerns.
Incorporating tensile strength into calculations improves the stability assessment of tunnel working faces substantially.