›› 2006, Vol. 27 ›› Issue (12): 2105-2110.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Theoretical analysis of cylindrical cavity expansion based on extended SMP criterion

LUAN Mao-tian 1, 2, LI Bo1, 2, 3   

  1. 1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China; 2. School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China; 3. College of Water Resources, Shenyang Agricultural University, Shenyang 110161, China
  • Received:2005-01-26 Online:2006-12-11 Published:2013-12-09

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Abstract: In order to incorporate the strain-softening and shear dilatation behavior of geomaterials in the analysis, a strain-softening stress-strain model with stress-dropping and a simplified model of ?v-?1 and ?1-?3 are adopted. Based on the extended spatial mobilization plane (SMP) theory, the governing equations of axisymmetric problem in the plane strain condition, the partial differential equations for the boundary-value problem of cavity expansion in cohesive soils are established; and the closed-form solutions of stresses, strains, displacements in the elastic and plastic regions are obtained. Consequently, the maximum radius of plastic region and ultimate cavity pressure are solved for cylindrical cavity expansion. Based on numerical results, the strain-softening rate and the effects of soil dilatancy on expansion of cylindrical cavity are examined. Also a comparative study is made for the present solution and current solution based on Mohr-Coulomb criterion in order to display the effect of intermediate principal stress. The results indicate that soil strain-softening and shear dilatancy as well as the intermediate stress have considerable effect on both ultimate cavity pressure and maximum radius of plastic region in the cylindrical cavity expansion.

Key words: shear dilatancy, strain softening, extended spatial mobilization plane criterion (SMP), expansion of cylindrical cavity, elastoplastic analysis

CLC Number: 

  • TU 43
  • 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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