›› 2014, Vol. 35 ›› Issue (1): 134-142.

• Geotechnical Engineering • Previous Articles     Next Articles

Elastoplastic solution of axisymmetric circular tunnel based on power-hardening model

HOU Gong-yu1，LI Jing-jing1，YANG Yue1, 2，WANG Ya-xiao1，LIANG Yong-hui1，LI Qing-wei1   

  1. 1. School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, China; 2. Heilongjiang College of Technology, Harbin 150027, China
  • Received:2012-11-14 Online:2014-01-10 Published:2014-01-14

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Abstract: A suitable yield criterion is the key to elastoplastic solution of axisymmetric circular tunnel. Many scholars observed corresponding solutions based on criteria of Mohr-Coulomb、Drucker-Prager and Hoek-Brown. The paper establishes power- hardening model, power hardening-perfectly plastic model based on Drucker-Prager failure criterion of axisymmetric circular tunnel; and acquires the elastoplastic solutions, taking strain-hardening effect into account during the calculation to meet the needs of practical engineering. For a project example, the paper compares the results of power hardening-perfectly plastic model based on Mohr-Coulomb failure criterion and Drucker-Prager failure criterion, and power-hardening model respectively. The influence of power-hardening index n on elastoplastic solutions of surrounding rock is analyzed. The study results show that the effect of strain-hardening is of great impact on the stability of surrounding rock, and it is of more practical value to adopt power-hardening model for the rock of great strain-hardening effect.

Key words: rock mechanics, elastoplastic solution, strain-hardening of surrounding rock, power-hardening model

CLC Number: 

  • TU 452
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