›› 2007, Vol. 28 ›› Issue (S1): 327-332.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Analytical elastoplastic solutions to supporting rock masses of circular tunnels under asymmetric load

SUN Jin-shan, LU Wen-bo   

  1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
  • Received:2007-05-30 Online:2007-10-25 Published:2014-03-28

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Abstract: Considering the behaviors of strength reduction and volume dilatancy of rock materials, the approximate analytical solutions to calculating the extent of the plastic zone, stress field and displacement field in rock masses of circular tunnels are proposed. The elastic-softening-residual plastic triple linear stress-strain model and the Mohr-Coulumb failure criterion are involved. The analytical solutions are valid when the plastic zone is comparatively large and the lateral pressure coefficients 1≤λ<3. These solutions are very close to the results calculated by the finite element method, which can be used for the simple elastoplastic analysis of the circular openings instead of the finite element method.

Key words: circular tunnel, asymmetrical load, strain softening, dilatancy, elastoplastic analysis

CLC Number: 

  • TU 452
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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