🚇 EPB Tunnel Face Pressure: Screw Conveyor Balance and Surface Settlement Trough (2D)

Cross-section of an earth pressure balance tunnel boring machine in soft ground with a water table. Set the cover depth, the soil strength, the water level, the chamber pressure set point, the advance rate and the screw conveyor error, and see the active, at-rest and blow-out pressures at the face, the chamber pressure settling under a proportional controller and the Gaussian settlement trough that a pressure deficit leaves at the surface. Mohr-Coulomb limits, the trough volume, the chamber balance and the stress profile are checked numerically, with four in-page numerical checks.