(Solution) - A vertical circular shaft will pass through a water bearing stratum at -(2025 Original AI-Free Solution)

Paper Details

A vertical circular shaft will pass through a water-bearing stratum at a depth of 847 m where the water pressure is estimated to be 1.45 MPa. Finished shaft diameter must be 5.5 m. The pre-shaft stress state is attributable to gravity alone. Rock properties are: Co = 46.6 MPa, To = 4.66 MPa, E = 16.6GPa, ? = 0.25, ? = 24.7kN/m3. What concrete liner thickness is indicated, assuming the maximum allowable concrete liner stress is 24.14 MPa?