Geomechanics and Engineering

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A new approach for the cylindrical cavity expansion problem incorporating deformation dependent of intermediate principal stress

  • Received : 2016.02.21
  • Accepted : 2016.11.10
  • Published : 2017.03.30
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Abstract

The problem of cylindrical cavity expansion incorporating deformation dependent of intermediate principal stress in rock or soil mass is investigated in the paper. Assumptions that the initial axial total strain is a non-zero constant and the axial plastic strain is not zero are defined to obtain the numerical solution of strain which incorporates deformation-dependent intermediate principal stress. The numerical solution of plastic strains are achieved by the 3-D plastic potential functions based on the M-C and generalized H-B failure criteria, respectively. The intermediate principal stress is derived with the Hook's law and plastic strains. Solution of limited expansion pressure, stress and strain during cylindrical cavity expanding are given and the corresponding calculation approaches are also presented, which the axial stress and strain are incorporated. Validation of the proposed approach is conducted by the published results.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

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